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Owners Manual Schweizer 269C Hook Kit 120-081-00
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1. OR syst s4s cOM I www 7 ONBOARDSY i p i core 7 i i NISTON or THIS MAI HE LATES SASK CHE Cargo Hook Kit For Schweizer 269C Part Number 200 244 00 Owner s Manual Owner s Manual Number 120 081 00 Revision 5 October 18 2007 Z CONBOARD SYSTEMS I N TERNATIONAL 13915 NW 3 Court Vancouver Washington 98685 USA Phone 360 546 3072 Fax 360 546 3073 Toll Free 800 275 0883 www OnboardSystems com This page intentionally left blank RECORD OF REVISIONS Revision Date Page s Reason for Revision 6 16 01 Section 4 Removed overhaul instructions from Section 4 and moved information to the new Service Manual 122 001 00 oo 2 2 3 5 Replaced hook picture to show new cover and S N RFMS pg 5 plate P N 215 154 00 09 05 06 3 1 Updated cargo hook kit maintenance information Section 4 02 13 07 1 1 2 2 amp Changed Cargo Hook P N 528 010 00 to 528 010 04 4 1 ref service bulletin 159 017 00 10 18 07 TOC Added explanation of warnings cautions and notes to Section 1 Section 1 Updated warnings cautions and notes 2 4 throughout document Section 3 Register Your Products for Automatic Notifications Onboard Systems offers a free notification service via fax or email for product alerts and documentation updates By registering your Onboard Systems products at our website we will be able to contact you if a service bullet
2. latched position A load release can be initiated by three different methods Normal release is achieved by pilot actuation of the push button switch in the cockpit When the push button switch is pressed it energizes the DC solenoid in the Cargo Hook and the solenoid opens the latch in the internal mechanism In an emergency release can be achieved by operating a mechanical release lever A manual release cable attached to the lever operates the internal mechanism of the Cargo Hook to unlatch the load beam The load can also be released by the actuation of a lever located on the side of the cargo hook 1 3 This page intentionally left blank Section 2 Installation Instructions These procedures are provided for the benefit of experienced aircraft maintenance facilities capable of carrying out the procedures They must not be attempted by those lacking the necessary expertise Cargo Hook Removal Remove the Schweizer supplied Cargo Hook from the aircraft by disconnecting the electrical release cable from the belly mounted bulk head type connector Disconnect the manual release cable from the cargo hook Remove the NAS1305 26D bolt AN310 5 nut and cotter pin used to attach the Cargo Hook to the suspension system mounting brackets Remove the cargo hook from the mounting brackets Also at this time remove the NAS1304 24 upper bolt NAS43HT4 81 spacer and MS21042 4 nut from the suspension system mounting brackets Cargo Hook Insta
3. a w FAA approved Rotorcraft Flight manual Supplement RFMS NO 120 081 00 dated June 30 1999 or later approved revision All other limitations in FAA STC STCSRO00711SE Prior to installation of this modification the installer must determine that the interrelationship between this modification and any other previously installed modification will introduce no adverse effect upon the airworthiness of the product The installation of this modification by third persons is subject to written permission of the approval holder This certificate shall remain valid unless otherwise surrendered or revoked For the European Aviation Safety Agency Date of Issue 9 July 2007 th Massi Cerfification Manager R gtorcraft Balloons Airships STC EASA IM R S 01287 Onboard Systems International 5 4 Certification FAA APPROVED ROTORCRAFT FLIGHT MANUAL SUPPLEMENT Schweizer 269C FAA Approval Special Certification Branch Seattle Aircraft Certification Office Date June 30 1999 Revised 7 Z br Jor Rotorcraft Flight Document Number Z CONBOARD Manual Supplement 120 081 00 SYSTEMS Cargo Hook INTRODUCTION This supplement must be attached to the appropriate approved Schweizer Rotorcraft Flight Manual when an Onboard Systems 200 244 00 Cargo Hook Kit is installed in accordance with Supplemental Type Certificate STC NO SROO711SE The information contained herein supplements or supersedes the basic manual only in t
4. braided eyes will work around the end of the load beam and fall free If cable or rope is used they should be first attached to a correctly sized primary ring Only the primary ring should be in contact with the cargo hook load beam See examples below Figure 3 5 Un Commanded Release Due to Cable or Rope Type Straps Cable or rope type line flips over the Load Beam The flip over often Occurs with long line operations during landings and take offs Load Ring moves inward and bears against the keeper The Keeper rotates allowing the Ring to slip off Operation Instructions 3 7 This page intentionally left blank Section 4 Maintenance Refer to Service Manual 122 001 00 for detailed maintenance information for the Cargo Hook Inspection The inspection of the Cargo Hook Kit shall be in accordance with the table below Table 4 1 Inspection Number Cargo Hook Bushing below at cargo hook overhaul interval 290 548 00 Visually check for excessive wear Inspect to the requirements of this manual see Adapter below at cargo hook overhaul interval Bushing 270 093 00 1 Check for security of attachment Most system problems will be the result of Electrical damaged wires and connectors damaged wires Keep the cables clean and Release Replace if damaged ensure that they are not chafing Replace if the Wire insulation or shield is damaged Harness All Inspect for cracks excessive wear and Repla
5. landings and take offs Load Ring moves inward and bears against the keeper The Keeper is forced to rotate allowing the Ring to slip off 3 4 Operation Instructions Load Hang Up Due to Too Small of a Load Ring or Multiple Load Rings Load rings that are too small or multiple load rings will hang on the load beam when the load is released Only correctly sized load rings must be used See examples below Figure 3 3 Load Hang Up Due to Too Small a Load Ring or Multiple Load Rings Jammed Ring Sling ee Load Hang Up Due to Multiple Rings on Load Beam Jammed Rings Sling Loa Operation Instructions 3 5 Un Commanded Release Due to Nylon Type Straps Nylon type straps or similar material must not be used directly on the cargo hook load beam as they have a tendency to creep under the keeper and fall free If nylon straps must be used they should be first attached to a correctly sized primary ring Only the primary ring should be in contact with the cargo hook load beam See examples below Figure 3 4 Un Commanded Release Due to Nylon Type Straps Nylon type strap on the Load Beam As the load swings the strap fibers work their way under the keeper The strap works its way off of the load beam 3 6 Operation Instructions Un Commanded Release Due to Cable or Rope Type Straps Cable or rope type straps must not be used directly on the cargo hook load beam Their
6. m m m Inspection Inspect the kit items for evidence of damage corrosion and security of lock wire and fasteners If damage is evident do not use the items until they are repaired 1 2 General Information Specifications Table 1 1 Cargo Hook Specifications Force required for mechanical 8 lb Max 400 travel release at 3 500 Ib Minimum release load Electrical requirements 22 28 VDC 9 amps 3 pounds 1 36 kg Mating electrical connector PCO6A8 2S SR Theory of Operation General Information The primary elements of the Cargo Hook are the load beam the internal mechanism and a DC solenoid The load beam supports the load and is latched through the internal mechanism The DC solenoid and an external manual release cable provide the means for unlatching the load beam The load beam is normally returned to its closed position after release of the load by a spring in the internal mechanism In the closed position a latch engages the load beam and latches it in this position The load is attached to the load beam by passing the cargo sling ring into the throat of the load beam past a spring loaded keeper which secures the load To release the load the latch is disengaged from the load beam With the latch disengaged the weight of the load causes the load beam to swing to its open position and the cargo sling slides off the load beam A spring in the internal mechanism then drives the load beam back to its closed and
7. Phone 360 546 3072 Maintenance Section 5 Certification STC Tnit States of Ameria Pepartment of Cransportation Feeral Aviation Administration Supplemental Type Certificate Number SR00711SE This certificate issued to Onboard Systems 13915 NW 3rd Court Vancouver WA 98685 certifies that the change in the type design for the following product with the limitations and conditions therefor as specified hereon meets the airworthiness reguirements of Part 6 of the Civil Ait Regulations Qriginal Product Type Certificate Number 4H12 Make Schweizer Model 269C Desorption of the Type Design Change Fabrication of Onboard Systems Model 200 244 00 cargo hook kit in accordance with FAA approved Onboard Systems Master Drawing List No 155 045 00 dated May 6 1999 or later FAA approved revision and installation of this replacement cargo hook in accordance with FAA approved Onboard Systems Owner s Manual No 120 081 00 dated May 3 1999 or later FAA approved revision Inspect this cargo hook kit in accordance with Section 4 of Onboard Systems Owner s Manual No 120 081 00 dated May 3 1999 or later FAA approved revision Lnitations and Conditions Approval of this change in type design applies only to those Schweizer 269C which were previously equipped with an FAA approved installation of Schweizer cargo hook kit P N 269A4971 27 This approval should not be extended to other rotorcraft of these models on which other previously approv
8. This procedure may vary in different countries Make the appropriate aircraft log book entry Paper Work Installation Instructions 2 5 This page intentionally left blank Section 3 Operation Instructions Operating Procedures Operation Instructions Prior to each job perform the following 1 Ensure that the Cargo Hook has been properly installed and that the manual and electrical release cables do not limit the movement of the hook Be completely familiar with this manual particularly the Cargo Hook rigging section Be completely familiar with all Schweizer cargo hook operating instructions Activate the electrical system and press the release button to ensure the cargo hook electrical release is operating correctly The mechanism should operate smoothly and the Cargo Hook must relatch after release If the hook does not relatch do not use the unit until the difficulty is resolved The release solenoid is intended to be energized only intermittently Depressing the electrical release button continuously in excess of 20 sec will cause the release solenoid to overheat possibly causing permanent damage Activate the release lever assembly located on the cyclic stick to test the cargo hook manual release mechanism The mechanism should operate smoothly and the Cargo Hook must relatch after release If the hook does not relatch do not use the unit until the difficulty is resolved See the Cargo Hook Service M
9. ae The swaged joint fails and allows the inner cable to activate the hook s mechanical release mechanism and the hook opens Installation Instructions Installation Check Out After installation of the Cargo Hook perform the following functional checks 1 Swing the installed Cargo Hook Ensure that the manual release cable assembly and the electrical release cable have enough slack to allow full swing of the suspension assembly without straining or damaging the cables The cables must not be the stops that prevent the Cargo Hook from swinging freely in all directions 2 Apply 10 20 pounds to the cargo hook load beam and squeeze the lever operated cargo hook mechanical release the cargo hook should release 3 Close the cargo hook release circuit breaker and position the battery switch to the ON position Apply 10 20 pounds to the cargo hook load beam and depress the cargo hook electrical release button the cargo hook should release 4 See the Schweizer service instructions for your specific helicopter model for additional installation instructions Component Weights The weight of the cargo hook components are listed in Table 2 1 Table 2 1 Component Weight Item Weight Ibs kgs Cargo Hook 3 0 1 36 Electrical Release Cable 0 5 23 Remove the Flight Manual Supplement from the back of this manual and place it into the Rotorcraft Flight Manual In the US fill in FAA form 337 for the initial installation
10. anual 122 001 00 and the aircraft s service instructions that cover the original Cargo Hook installation for additional instructions 3 1 Cargo Hook Rigging 3 2 Extreme care must be exercised in rigging a load to the Cargo Hook If the load ring is too big it may work its way around the end of the load beam and be supported for a time on the keeper and then fall free If the load ring is too small it may jam itself against the load beam during an attempted release The following illustrations show recommended configurations and potential difficulties that must be avoided The examples shown are not intended to represent all problem possibilities It is the responsibility of the operator to assure the hook will function properly with the rigging Operation Instructions Cargo Hook Rigging continued Figure 3 1 Examples of Correct and Incorrect Cargo Hook Rigging Correct Rigging Incorrect Rigging Multiple Rings on Primary Ring Operation Instructions 3 3 Un Commanded Release Due to Too Large of a Load Ring Load rings that are too large will cause an un commanded release The ring will flip over the end of the load beam and flip the keeper up and then fall free Only correctly sized load rings must be used See examples below Figure 3 2 Un Commanded Release Due to Too Large of a Load Ring Load Ring flips over the Load Beam and gyrates The flip over often occurs with long line operations during
11. ce fasteners at cargo hook overhaul fasteners security or attachment If worn interval excessively or cracked replace part Refer to Service Manual 122 001 00 for overhaul interval for the Cargo Hook Bushing Overhaul Inspect the bushing and bearing surfaces for wear and corrosion Pitting corrosion or excessive wear is cause for rejection Maximum permissible bushing clearance is 010 on diameter Maintenance 4 1 Instructions for Returning Equipment to the Factory If an Onboard Systems product must be returned to the factory for any reason including returns service repairs overhaul etc obtain an RMA number before shipping your return NOTICE An RMA number is required for all equipment returns e To obtain an RMA please use one of the listed methods Contact Technical Support by phone or e mail Techhelp OnboardSystems com Generate an RMA number at our website http Awww onboardsystems com rma php e After you have obtained the RMA number please be sure to 4 2 Package the component carefully to ensure safe transit Write the RMA number on the outside of the box or on the mailing label Include the RMA number and reason for the return on your purchase or work order Include your name address phone and fax number and email as applicable Return the components freight cartage insurance and customs prepaid to Onboard Systems 13915 NW 3rd Court Vancouver Washington 98685 USA
12. d directly on the cargo hook load beam Their braided eyes will work around the end of the load beam and fall free If cable or rope is used they should first be attached to a correctly sized primary ring Only the primary ring should be in contact with the cargo hook load beam See examples below Figure 5 Un commanded release due to cable or rope type straps Cable or rope type line flips over the Load Beam The flip over often occurs with long line operations during landings and take offs Load Ring moves inward and bears against the keeper The Keeper rotates allowing the Ring to slip off Z2 Rotorcraft Flight Ho CONBOARD Manual Supplement 120 081 00 SYSTEMS Page INTERNATIONAL Cargo Hook
13. ed modifications are incorporated unless it is determined by the installer that the relationship between this change and any of those other previously approved modifications including changes in type design will introduce no adverse effect upon the airworthiness of that rotorcraft Modified rotorcraft must be operated in accordance with an FAA approved copy of Onboard Rotorcraft Flight Manual Supplement RFMS No 120 081 00 dated June 30 1999 or later FAA approved revision A copy of this Certificate and FAA approved RFMS must be maintained as part of the permanent records of the modified rotorcraft If the holder agrees to permit another person to use this certificate to alter the product the holder shall give the other person written evidence of that permission This certificate and the supporting data which is the basis for approval shall remain in efect until sur rendered suspenied revoked ov a termination dale is otherwise established by the Administrator of the Date of applications May 11 1999 Date of issuance June 30 1999 Title Any alteration of this certificate is punishable by a fine of not exceeding 1 000 or imprisonment not exceeding 3 years or both This certificate may be transferred in accordance with FAR 21 47 FAA Form 8110 2 10 68 Canadian STC 5 2 _ Subject __Familiarization of STCs SR00711SE SH829NW and SH69S5NW Canadian Approval was granted on September 17 1999 by familiarization
14. for a time on the keeper and then fall free If the load ring is too small it may jam itself against the load beam during an attempted release The following illustrations show recommended configurations and potential difficulties that must be avoided WARNING The examples shown are not intended to represent all problem possibilities It is the responsibility of the operator to assure the hook will function properly with the rigging Figure 1 Examples of correct and incorrect cargo hook rigging Corect Rigging T OB rimary Ring I D Secondary Ring or Shackle Incorrect Rigging Multiple Rings on Primary Ring Z2 Rotorcraft Flight Ho CONBOARD Manual Supplement 120 081 00 SYSTEMS Page INTERNATIONAL Cargo Hook gt Ill PROCEDURES continued Un Commanded Release Due to Too Large of a Load Ring WARNING Load rings that are too large will cause an un commanded release The ring will flip over the end of the load beam and flip the keeper up and then fall free Only correctly sized load rings must be used See examples below Figure 2 Un commanded release due to load rings that are too large Load Ring flips over the Load Beam and gyrates The flip over often occurs with long line operations during landings and take offs Load Ring moves inward and bears against the keeper The Keeper is forced to rotate allowing the Ring to slip off Z2 Rotorcraft Flight Ho CONBOARD Manual Supplemen
15. hose areas listed herein For limitations procedures and performance information not contained in this supplement consult the basic Rotorcraft Flight Manual I LIMITATIONS The basic Flight Manual remains applicable When an Onboard Systems 200 244 00 Cargo Hook Kit is installed the following placard applies e Mounted on bottom of Cargo Hook WARNING USE LOAD RING WITH 1 5 7 INCH NOMINAL INTERNAL DIMENSION ONLY OTHER Ze RINGS ies Il PERFORMANCE The basic Flight Manual remains applicable HI PROCEDURES Before each Cargo Hook use perform the following procedures If the procedures are not successful do not use the equipment until the problem has been corrected Inspect all mounting fasteners to ensure that they are tight Visually inspect the electrical connector for loose or damaged pins and sockets Operate the keeper manually and check that it snaps back to its normal position on the load beam Inspect the case and covers for cracks and damage Inspect the load beam for gouges and cracks Cycle the manual release mechanisms to ensure proper operation Cycle the electrical release mechanisms to ensure proper operation Z2 Rotorcraft Flight Ho CONBOARD Manual Supplement 120 081 00 SYSTEMS Ill PROCEDURES continued Cargo Hook Rigging Extreme care must be exercised in rigging a load to the Cargo Hook If the load ring is too big it may work its way around the end of the load beam and be supported
16. in is issued or if the documentation is updated You can choose to receive notices on an immediate weekly or monthly schedule via fax email or both methods There is no charge for this service Please visit our website at www onboardsystems com notify php to get started This page intentionally left blank CONTENTS Section 1 Section 2 Section 3 Section 4 Section 5 General Information Introduction 1 1 Warnings Cautions and Notes 1 1 Bill of Materials 1 2 Inspection 1 2 Specifications 1 3 Theory of Operation 1 3 Installation Instructions Cargo Hook Removal 2 1 Cargo Hook Installation 2 1 Secure the Release Cables 2 4 Installation Check Out 2 5 Component Weights 2 5 Paper Work 2 5 Operation Instructions Operating Procedures 3 1 Cargo Hook Rigging 3 2 Cargo Hook Rigging Illustrations 3 3 Maintenance Inspection 4 1 Instructions for Returning a System to the Factory 4 2 Certification STC 5 1 Canadian STC 5 2 EASA STC 5 3 Rotorcraft Flight Manual Supplement CONTENTS continued ii Figures Tables 2 1 2 2 2 3 2 4 2 5 2 6 3 1 3 2 3 3 3 4 3 5 1 1 2 1 4 1 Travel Limit Bumper Installation 2 1 Attach Hardware Installation 2 2 Bumper Pads 2 2 Manual Release Cable Rig 2 3 Un commanded Release From Incorrectly Secured Cable 2 4 Installation Overview 2 4 Examples of Correct and Incorrect Cargo Hook Rigging 3 3 Un commanded Release Due to Large L
17. llation Installation Instructions Verify that the part number of the cargo hook removed is a Breeze Eastern 2A20B P N 17149 4 If it is not do not attempt to use the new cargo hook unless compatibility is determined Inspect the suspension system mounting brackets and attaching hardware to insure that all components are in serviceable condition Install the new Cargo Hook to the existing Schweizer suspension system mounting brackets using the hardware supplied with the new hook as illustrated in Figure 2 1 The cargo hook load beam is to point aft 2 1 Cargo Hook Installation continued Figure 2 1 Attach Hardware Installation 510 115 00 510 320 00 COTTER PIN NUT MS24665 136 ag hy ee SN310 5 290 548 00 BUSHING aT A Pa VIEW A A 528 010 00 a CARGO HOOK 510 239 00 510 318 00 WASHER NAS1149F0532P BOLT NAS6604 27 opce 510 319 00 517 029 00 BOLT SPACER NAS43HT4 98 NAS6605D29 510 100 00 WASHER AN960 416L 510 227 00 528 010 04 a CARGO HOOK 2 2 Installation Instructions Cargo Hook Installation continued Connect the manual release cable to the Cargo Hook by first removing the cargo hook manual release cover Locate the swaged end of the manual release cable assembly the other end is the cable adjuster Thread the swaged end of the manual release cable all the
18. o 1702 2003 and issued to Onboard Systems International 13915 NW 3rd Court 98685 Vancouver Washington USA certifies that the change in the type design for the product listed below with the limitations and conditions specified meets the applicable type certification basis and environmental protection requirements when operated within the conditions and limitations specified below Original Product Type Certificate number FAA TCDS 4H12 Manufacturer Schweizer Model Schweizer 269 C Original STC Number FAA STC SROO711SE Description of Design Change Validation of FAA STCSR00711SE amended January 13 2003 or later approved versions Certification 5 3 EASA STC continued European Aviation Safety Agency Associated Technical Documentation Fabrication of Onboard Systems Model 200 244 00 cargo hook kit i a w FAA approved onboard system MDL No 155 045 00 dated 3 May 1999 or later approved revision Installation of this replacement cargo hook i a w FAA approved Onboard System owner s manual No 120 081 00 dated 3 May 1999 or later approved revision Inspection of this cargo hook i a w Section 4 of Onboard System owner s manual No 120 081 00 dated 3 May 1999 or later approved revision Limitations and Conditions Approval of this STC apply only to those Schweizer 269C which were previously equipped with FAA approved installation of Schweizer cargo hook kit P N 269A4971 27 Modified rotorcraft must be operated i
19. oad Ring 3 4 Load Hang Up Too Small or Multiple Load Rings 3 5 Un Commanded Release Due to Nylon Straps 3 6 Un Commanded Release Due to Cable or Rope Straps 3 7 Specifications 1 2 Component Weight 2 5 Inspection 4 1 Section 1 General Information Introduction The 200 244 00 Schweizer 269C Cargo Hook Kit is approved for installation with the following Schweizer Cargo Hook Kits 269A4971 27 Warnings Cautions and Notes The following definitions apply to Warnings Cautions and Notes used in this manual Means that if this information is not observed serious injury death or immediate loss of flight safety could occur Means that there is a risk of injury or degradation in performance of equipment if this information is not observed NOTE Draws the reader s attention to information which may not be directly related to safety but which is important or unusual General Information 1 1 Bill of Materials The following items are included with the Cargo Hook Kit if shortages are found contact the company from whom the system was purchased Part Number Description Quantity 528 010 04 Cargo Hook 290 33 1 00 Release Fitting 290 364 00 Bushing 510 318 00 Bolt 517 029 00 Spacer 510 100 00 Washer 510 227 00 Nut 510 319 00 Bolt 290 548 00 Adapter Bushing 510 239 00 Washer 510 320 00 Nut 510 115 00 Cotter Pin 270 093 00 Electrical Release Wire Harness 120 08 1 00 Owners Manual ND i e m m
20. of FAA STC SR00711SE Refer to the following letter iwi Transport Transports Canada Canada Aviation Aviation i ification B Aircraft Certification Branch Your file Votre r f rence 620 800 Burrard Street 99 190S 423 503 Vancouver BC V6Z 248 Our file Notre r f rence September 17 1999 Onboard Systems 11212 NW Saint Helens Road Portland OR 97231 USA Attention Mr Mark Lemmon Dear Mr Lemmon This is in response to your letters dated April 8 1999 and July 12 1999 making application for Canadian approval of the subject STCs Hitherto Transport Canada policy has been a process of familiarizing FAA STCs and issuing corresponding Canadian documents However following new policy now being implemented for certain categories of FAA STCs some will be accepted entirely on the basis of the FAA document and entered on a national index This letter is your verification of the acceptance of the subject STCs by Transport Canada Should you require additional information with regards to this matter or clarification please do not hesitate to contact Mr Henry Wong at 604 666 5597 Yours truly Regional Engineer Aircraft Certification for Minister of Transport c c Mr Ali Bahrami Manager Seattle ACO Canada i Certification EASA STC European Aviation Safety Agency SUPPLEMENTAL TYPE CERTIFICATE EASA IM R S 01287 This certificate established in accordance with Regulations EC No 1592 2002 and EC N
21. t 120 081 00 SYSTEMS Ill PROCEDURES continued Load Hang Up Due to Too Small of a Load Ring or Multiple Load Rings WARNING Load rings that are too small or multiple load rings will hang on the load beam when the load is released Only correctly sized load rings must be used See examples below Figure 3 Load hang up due to load rings that are too small or using multiple load rings Jammed Ring Load Hang Up Due to Multiple Rings on Load Beam lt Rotorcraft Flight Hi CONBOARD Manual Supplement 120 081 00 SYSTEMS Page INTERNATIONAL Cargo Hook a Ill PROCEDURES continued Un Commanded Release Due to Nylon Type Straps WARNING Nylon type straps or similar material must not be used directly on the cargo hook load beam as they have a tendency to creep under the keeper and fall free If nylon straps must be used they should first be attached to a correctly sized primary ring Only the primary ring should be in contact with the cargo hook load beam See examples below Figure 4 Un commanded release due to nylon type straps Nylon type strap on the Load Beam As the load swings the strap fibers work their way under the keeper The strap works its way Off of the load beam Rotorcraft Flight Document Number lt gt CONBOARD Manual Supplement 120 081 00 SYSTEMS Ill PROCEDURES continued Un Commanded Release Due to Cable or Rope Type Straps WARNING Cable or rope type straps must not be use
22. way into the hook and tighten against the hook Place the cable ball end fitting into the hook manual release fork fitting as illustrated in Figure 2 2 Figure 2 2 Manual Release Cable Rig Manual Release Cable Swaged End Fork Fitting L Ball End Fitting Connect the Cargo Hook electrical release cable harness connector to the cargo hook and the belly mounted bulk head receptacle and safety wire the connector Listed below is the pin out for the cargo hook and the bulkhead connector Cargo Hook Connector Bulkhead Connector Pe rower a foro 2 3 Installation Instructions Secure the Release Cables 2 4 Un commanded cargo hook release will happen if the manual and electrical release cables are improperly restrained The cables must not be the stops that prevent the Cargo Hook from swinging freely in all directions If the Cargo Hook loads cause the hook to strain against the manual release cable the swaged end of the cable may separate allowing the inner cable to activate the cargo hook manual release mechanism The result is an un commanded release Ensure that no combination of cyclic stick or Cargo Hook position is restrained by the manual or electrical release cables Figure 2 3 Un commanded Release From Incorrectly Secured Cable Hook rotates and strains against the manual release conduit The strain on the conduit exceeds the pull off force between the swaged fitting and the conduit
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