maintenance manual lh 350 flight helmet
Contents
1. The Safety Company CONFIDENTIAL INDUSTRY MAINTENANCE MANUAL LH 350 FLIGHT HELMET Ref 180722 PP0200175 ind00 1 18 The Safety Company CONFIDENTIAL INDUSTRY Table of Contents Topic Page Table of Contents 2 19 WARNING 3 19 DESCRIPTION OF HELMET 4 19 GUARANTEE 5 19 PREAMBLE 6 19 CHINSTRAP 7 9 CLOTHING 8 19 OUTER VISOR 9 19 INNER VISOR 10 19 NVG HARD COVER 11 19 THE INNER IMPACT CAP 12 and 13 19 NECK PAD 14 19 ACCESS TO ELECTRONIC CARD 15 19 ELECTRONIC CARD 16 19 INSPECTION VERIFICATION 17 19 AND MAINTENANCE REQUIREMENTS MANDATORY INSPECTION 18 19 AND REPLACEMENT CRITERIA Ref 180722 PP0200175 ind00 2 18 The Safety Company CONFIDENTIAL INDUSTRY Thank you for placing your trust in MSA products Please read these instructions carefully before using your helmet Failure to observe these instructions could reduce the amount of protection your helmet provides Your helmet will only provide maximum protection if all of the MSA components are used with it Furthermore any change made to your helmet or failure to use one of the original helmet components will imply improper use of the equipment and will discharge MSA of any liability In an ongoing effort to improve its products MSA hereby reserves the right to alter them at no notice To guarantee sufficient protection the helmet must be adapted and adjusted to the wearer s head size Your helmet is designed such that the pressure built up when it2. Flat blade screwdriver Threadlocking low strength LOCTITE 222 or equivalent Ref 180722 PP0200175 ind00 6 18 The Safety Company CONFIDENTIAL INDUSTRY 1 Chinstrap Tools 20 and 15 TORX keys 7 mm combination wrench and flat blade screwdriver Dismantling duration 1 minute Mounting duration 2 minutes Open the chinstrap 7 mm combination wrench Inside detail 15 TORX key Inside detail 4 points chinstrap disassembly Left and right chinstrap dismantle 1 front fixation points unscrew the outer screw with the 20 key TORX while maintaining inner helmet nut with 7 mm combination wrench remove the nut cap with the screw driver before 2 rear fixation points unscrew the inner helmet screw with the 15 TORX key Proceed in the reverse order to reassemble Warning Apply Threadlocking low strength on the inner TORX screw back fixation point before mounting When removing the chin cup check that the buckle is correctly positioned the opened side of the buckle towards the outside of the helmet Ref 180722 PP0200175 ind00 7 18 The Safety Company CONFIDENTIAL INDUSTRY 2 Clothing Tools none Dismantling duration 20 seconds Mounting duration 45 seconds LH 350 helmet includes 2 comfort parts and spacers e 1 adjustable comfortable T shaped spacer with 4 mm 8mm and 12mm thick foam e Comfort neck spacer with 4 mm 8mm and 12mm thick foams e Self gripp
3. fixed inside the shell by Velcro spacers The chinstrap is made of a synthetic fire proof fibre strap with a clipping buckle A leather chinstrap covers the strap to ensure user s comfort at the chin A helmet protective bag Serial Number Helmet Log Card and Modification Record Every MSA flight helmet is supplied with a helmet log card recording the manufacturing and model details of the helmet in addition to recording modifications and Level 3 repairs to the helmet Each helmet is individually serial numbered to ensure correct identification of the helmet and a correct record of the service life history of the helmet Ref 180722 PP0200175 ind00 4 18 The Safety Company CONFIDENTIAL INDUSTRY All of our models accessories and spare parts are meticulously inspected before leaving the factory MSA helmets and their options are guaranteed for one year from the date of purchase Guarantee provides for parts and labor repair or replacement of the helmet and components arising from any mechanical or electrical failure or defect which may occur during normal operating conditions as described in the helmet Instruction Manual supplied with each helmet Ref 180722 PP0200175 ind00 5 18 The Safety Company CONFIDENTIAL INDUSTRY Important for any repair install the helmet at least on the helmet protecting bag Necessary tools 20 15 and 10 TORX key mm combination wrench 2 mm hexagonal screw driver
4. is knocked is absorbed by the partial destruction or damage to the outer and inner cap even if such damage is not immediately apparent we recommend replacing any helmet which has taken a considerable impact The user s attention is also drawn to the dangers of modifying or removing any of the original components of the helmet apart from any modification or removal recommended by the helmet manufacturer Under no circumstances should helmets be adapted for attachment of accessories by any means not recommended by the helmet manufacturer Do not apply any paint solvents adhesives or self adhesive labels other than those recommended by the helmet manufacturer s instructions Checks should be made following any apparent impact carried out by our maintenance department or a specialist The MSA LH 350 flying helmet is designed only for helicopter pilots and crew members It ensures a maximum comfort and protection Available in three sizes to fit head measuring between 52 cm to 64 cm It incorporates two visors and could receive a wide range of communication systems and Night Vision Goggles supports available to order Please contact us for details Each helmet is individually serial numbered to ensure correct identification of the helmet and a correct record of the service life history of the helmet Ref 180722 PP0200175 ind00 3 18 The Safety Company CONFIDENTIAL INDUSTRY The LH350 helmet shell is made of e Aone piece she
5. DUSTRY Pull the rear side of the inner impact cap to release the inner cap of the shell Then pull the front part of the inner cap Proceed in the reverse order to reassemble Warning for neck pad mounting see 7 Ref 180722 PP0200175 ind00 13 18 The Safety Company CONFIDENTIAL INDUSTRY 7 Neck pad mounting Tools 2 mm ALEN screw driver Mounting duration 1 minutes Outside the shell partly unscrew the 4 screws with 2 mm ALEN screw driver Inside the shell insert the 2 clamps of the neck pad in the electronic card support seating Outside the shell screw the 4 screws with 2 mm ALEN screw driver Ref 180722 PP0200175 ind00 14 18 The Safety Company CONFIDENTIAL INDUSTRY 8 Access to the electronic card Tools 2 mm ALEN screw driver 15 TORX key Dismantling duration 3 minutes Mounting duration 4 minutes Unscrew the 4 screws with 2 mm ALEN screw driver Remove the cover to have access to the electronic card Unplug the cable plug on the card Remove the cable for a complete access to the electronic card Unscrew the cable maintain screw with the 15 TORX key Proceed in the reverse order to reassemble Ref 180722 PP0200175 ind00 15 18 The Safety Company CONFIDENTIAL INDUSTRY 9 Electronic card Tools flat blade screwdriver Dismantling duration 1 minute Mounting duration 2 minutes see 8 for access to electronic card Unplug the 3 J
6. ST plugs Left earphone Hight earphone Microphone T d xis i MEER m ALLET m Ol MIVEALI A 4 mim P L EI r 4 Pull out the card with the flat screw driver as shown Proceed in the reverse order to reassemble Ref 180722 PP0200175 ind00 16 18 The Safety Company CONFIDENTIAL INDUSTRY 10 Inspection Verification and Maintenance Requirements The MSA range of flight helmets is designed as a modular solution to meet the requirements of helicopters pilots and crew members The helmet is designed to require minimal maintenance intervention and recommended servicing or repair is on an ON CONDITION BASIS Accordingly a full periodic service program is not recommended or required in support of the LH350 flight helmets Listed below is a recommended schedule of servicing which may be adopted by users of the LH350 flight helmet MSA do not recommend a program of servicing which involves complete disassembly of the helmet on a periodic basis The helmet is designed and engineered to enter and remain in operational service until such time as corrective maintenance is required for unserviceabilities of the helmet shell visor system or communications package Inspection Verification and Maintenance Matrix Basic Controls Before each flight Cleanness and working of the visors Attendance of the comfort pads Chinstrap status working and fixation points Functional check of communications Yes es Y H
7. act and rendered unusable or destroyed Mandatory Inspection Requirement Unconfirmed Impact Where damage consistent with helmet impact is displayed The helmet is to be inspected for the following Indentation cracking or deformation of the composite fibers shell and hard cover Damage to the composite shell construction including cut or Mandatory frayed fibers Inspection if Removal of outer protective coating resulting in the Impact degradation of the gel coating exposure of composite fibers Suspected Dislodgement or deformation of the impact cap Damage to the visor adjustment and rotation mechanisms Damage to the chinstrap webbing buckle assembly and fixation points Inspection to be recorded on helmet log card If damage consistent with an impact is confirmed Mandatory Replacement is required User amp Operational Maintenance Responsibility All helmet users and operational maintenance units are responsible for reporting known or suspected impact incidents and damage to helmet shells Operational maintenance units are responsible for ensuring the required inspection criteria are met in assessing the continued serviceability of the helmet Failure to withdraw a damaged helmet shell from operational use will relieve MSA from any liability in the event of helmet failure Ref 180722 PP0200175 ind00 18 18
8. ard cover fixation points Yes Fixation points of electronic box Y Yes Periodic Controls Tightening and working of inner and outer visors communication system anti cable tear out system State of the visors and fixation system State of the pads State of comfort ear set State of the chin strap and working of the locking system State of the shell single impact use Cleaning as specified in User Manual Major Spare Parts Replacement Forecast Replacement Every Interval Inner visor 5 years Outer visor TSHAPED SPACER NECK PAD SPACER Comfort ear seal a Chinstrap Inner cap Shell Note Inspection criteria based on a standard 200 hours annual usage period Ref 180722 PP0200175 ind00 17 18 The Safety Company CONFIDENTIAL INDUSTRY 11 Mandatory Inspection amp Replacement Criteria This section details the mandatory actions and inspections required when a helmet suffers a confirmed impact incident OR when routine maintenance reveals damage consistent with an impact incident Mandatory actions and inspection requirements are detailed in the matrix listed below Mandatory Inspection amp Replacement Criteria Matrix ACTION TO BE TAKEN Impact The helmet shell is designed for single impact use ONLY e The helmet shell and protective integrity is considered CONFIRMED compromised following a confirmed impact IMPACT The helmet shell is to be removed from service immediately following a confirmed imp
9. ing spacers for ear cup adjustment La Those elements are fixed inside the helmet by self gripping tapes When changing the foam in the T shaped spacer and in the comfort neck spacer insure that the chosen foams are well positioned Check the presence of the trapezoid insert with the comfort neck spacer 4mm thickness foam no hole amm thickness foam 1 hole Ref 180722 PP0200175 ind00 8 18 The Safety Company CONFIDENTIAL INDUSTRY 3 Outer visor Tools none Dismantling duration 2 minutes Mounting duration 2 minutes Unscrew the 2 captive screws on the right and left sides Raised the hard cover by rotating back side the hinge Proceed in the reverse order to reassemble Warning When replacing the hard cover ensure that the lug is securely in place beneath the base See below ocrew up the captive screws on the right and left sides lug Opened position Closed position Ref 180722 PP0200175 ind00 9 18 The Safety Company CONFIDENTIAL INDUSTRY 4 Inner visor Tools none Dismantling duration 2 minutes Mounting duration 2 minutes Lower the inner visor Unscrew the 2 captive screws on the right and left sides Raised the hard cover by rotating back side the hinge 1 Open the left and right base covers by rotating upwards do not unscrew anything 2 Disengage the visor interfaces from their axis of rotation visor interface Proceed in the reve
10. ll in high performance composite fibers The shell covers a large head protection zone e An expanded polystyrene inner padding for impact absorption It is covered with a velvet lining for the user s comfort e Custom fit pads are used to fit the helmet to the users headform The outside coating is flame retardant The inner lining is made up of two comfort spacers the T shaped spacer and the neck spacer each of these spacer can be personalized with different foam in 3 thickness 4mm 8mm and 12mm which make it possible to obtain a perfect fit for the user s head form The lining elements are made up of different thickness foam inserts covered in a patented wicking material to draw moisture away from the users skin in hot and humid climates and ensure the user s comfort These two comfort spacers are attached inside the shell by Velcro strips Adaptation to the user s head form is made by choosing the foam thickness inside each spacer Two protective visors manufactured are fitted to the LH350 e Both visors are mounted on the outside of the helmet shell and fully protected by the hard cover e Both visors can be adjusted to suit the users requirements The acoustic protection system is made up of e Two injection molded thermoplastic earcups with a recess to accommodate the communication earphones e Two earseals for comfort ergonomically shaped e Specific acoustic foam These earcups ensure correct acoustic protection and are
11. rse order to reassemble Warning When replacing the hard cover in closed position ensure that the lug is securely in place beneath the base y lug Opened position Closed position ocrew up the captive screws on the right and left sides Ref 180722 PP0200175 ind00 10 18 The Safety Company CONFIDENTIAL INDUSTRY 5 NVG hard cover Tools 2 mm ALEN screw driver Dismantling duration 2 minutes Mounting duration 3 minutes Unscrew the 2 captive screws on the right and left sides Unscrew the 2 ALEN screws on the hinge Proceed in the reverse order to reassemble Warning When replacing the hard cover ensure that the lug is securely in place beneath the base See below lug DEA I Opened position Closed position ocrew up the captive screws on the right and left sides Ref 180722 PP0200175 ind00 11 18 The Safety Company CONFIDENTIAL INDUSTRY 6 The inner impact cap Tools 15 TORX key Dismantling duration 5 minutes Mounting duration 8 minutes To dismantle the inner cap remove all the comfort parts T spacer neck spacer remove the two ear cups dismantle the chinstrap see chap 2 Remove the neck pad Remove the stud Remove the inner left and right inner padding Remove the blocking pieces on each side of the shell Inner detail 15 TORX key Ref 180722 PP0200175 ind00 12 18 The Safety Company CONFIDENTIAL IN
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