SB 137W - Revised Time Between Overhaul (TBO
Contents
1. 16 17 18 hour life limit on hub a 6000 hours or 60 calendar months whichever occurs first for those C1103 and C1104 propellers identified by serial number in the Airworthiness Limitations Section section 11 of the MPC1100 X or section 8 of the CMM1101 X and installed on 1500 shp aircraft 16 800 hour life limit on blades 5000 hours or 72 calendar months whichever occurs first Only for L106FA 0 blades used in the 4HFR34C653 propeller assemblies or blades that have been installed on Jetstream Series 3200 aircraft or history unknown a Blades without change letter A must be retired from service before December 1 2001 or upon reaching 2400 flight hours after August 1 2000 or 16 000 hours time since new whichever occurs first b Blades with change letter A are life limited to 16 000 hours Fixed pitch propellers 2000 hours or 72 calendar months which ever occurs first Additionally the propeller mounting bolt torque should be checked at least once per year Propeller mounting bolts must be magnetic particle inspected per ASTM E 1444 or liquid penetrant inspected per ASTM E 1417or replaced at every overhaul Propeller mounting bolts must be replaced whenever the propeller is involved in a blade strike as defined in Service Bulletin 176 X 1A170E JHA XXXX propellers only installed on Aircraft Operating as Pilot Schools per 14 CFR Part 141 must be inspected per Service Bulletin 240 X every 1000 hours or2. 72 calendar months which ever occurs All Propeller Governors 1800 hours or 60 calendar months whichever occurs first All Propeller Accumulators 1800 hours or 60 calendar months whichever occurs first
3. SERVICE BULLETIN 137W May 15 2002 TO FAAApproved Propeller Repair Stations Aircraft Manufacturers and Owners SUBJECT Revised Time Between Overhaul TBO Specifications MODELS AFFECTED _ AllPropellers Governors and Accumulators SERVICE MANUALS AFFECTED 701115 710930 720415 730720 761001 780401 780630 790901 810301 810915 860201 880415 890119 MPC1100 X CMM1100 X Service Bulletin 137W replaces Service Bulletin 137U dated February 15 2002 Service Bulletin 137V was not released to the field This update clarifies that life limit requirements for L106FA 0 blades used in the 4HFR34C653 propeller is specific to propeller assemblies or blades that have been installed on Jetstream Series 3200 aircraft or history unknown incorpo rates new inspection limits on 1A170E JHA fixed pitch propellers and adds the C238 models Vertical lines in margin indicate changes APPROVAL FAA approval has been obtained on technical data in this publication that affects product type design TO OBTAIN SATISFACTORY RESULTS PROCEDURES SPECIFIED IN THIS SERVICE INFORMATION MUST BE ACCOMPLISHED IN ACCORDANCE WITH ACCEPTED METHODS AND PREVAILING GOVERNMENT REGULATIONS MCCAULEY PROPELLER SYSTEMS CANNOT BE RESPONSIBLE FOR THE QUALITY OF THE WORK PERFORMED IN ACCOMPLISHING THIS SERVICE INFORMATION McCauley Propeller Systems 3535 McCauley Drive Vandalia Ohio 45377 USA Service Bulletin 137W Page 2 of 13 The following pages show McCauley s
4. ccordance with the governor service manual Service Bulletin 137W Page 6 of 13 TABLE PROPELLER MODELS NOTE The propeller model designation is impression stamped on the propeller hub Change letters are frequently stamped at the end of the model designation e g 2A34C50 BM These letters indicate engineering changes and or previous overhaul modifications In this table unless specific change letters are shown the overhaul frequency note applies to all propellers of that model regardless of change letters Use the highest letter stamped after hub model number to determine frequency of overhaul Example Propeller model 2A36C66 ALMOR R is the highest letter TBO note 3 applies Propeller model 2A36C66 AEF F is the highest letter TBO note 1 applies MODEL SEE OVERHAUL MODEL SEE OVERHAUL DESIGNATION FREQUENCY NOTE DESIGNATION FREQUENCY NOTE Service Bulletin 137W Page 7 of 13 D2AF34C61 less than O D2AF34C65 less than O Service Bulletin 137W Page 8 of 13 arcane 2A34C201 less than C 2A37C223 C or higher 2A34C201 C or higher B2D37C224 ese Service Bulletin 137W D2AF34C305 less than B D2AF34C305 B or higher D2AF34C306 D2AF34C307 D2AF34C308 D2AF34C310 D2AF34C312 D2AF34C314 D2AF34C315 D2AF34C317 D2AF34C318 D2AF34C320 D3A34C401 D3A34C402 D3A34C403 D3A34C404 B3D34C405 3A32C406 less than D 3A32C406 D or higher B3D32C407 D3A32C408 D3A32C409
5. is 1400 hours the propeller should be overhauled at the same time as the engine This is appropriate as long as neither TBO limit is exceeded TBO specifications are based on normal aircraft with normal and continuous usage Flight time and calendar limit must not be the only factors considered in determining when a propel ler governor or accumulator needs to be overhauled Factors such as operating conditions or environment often demand that a propeller governor or accumulator be overhauled prior to TBO Eventhough a propeller governor or accumulator may be operating normally and have a good external appearance when the TBO flight time or calendar limit is reached operation beyond the specified TBO limits is not permitted CAUTION Please review applicable FAA Airworthiness Directives or McCauley Service Bulletins These may require compliance prior to TBO Service Bulletin 137W Page 3 of 13 Long Term Storage of Controllable Pitch Propellers The following is applicable to new and overhauled propellers prior to entering service engine installation or at any time propeller is removed from service Storage time is determined from date of manufacture overhaul or removal from aircraft A Storage must be in a clean and dry environment preferably in the original shipping carton and above ground level to minimize exposure to dirt and moisture B If storage period exceeds two 2 years before entering service or re
6. less than D D3A32C409 D or higher D3A36C410 D3A32C411 B3D32C412 Page 9 of 13 ee o n o cwn S ee ee o p e recemo e j meon o p ee O re j emen ee ae eee T ee ee a a T E Ce _ E Toe TE Service Bulletin 137W Page 10 of 13 3AF34C502 4HFR34C653 15 3AF34C503 4HFR34C661 8 3AF32C504 4HFR34C662 8 3AF32C505 4HFR34C663 12 3AF32C507 4HFR34C665 11 Service Bulletin 137W Page 11 of 13 BSJFR36C1101 CS5JFR36C1102 BSJFR36C1103 CS5JFR36C1104 SHFR34C1105 Fixed Pitch Propellers Propeller Governors Propeller Accumulators Service Bulletin 137W Page 12 of 13 OVERHAUL FREQUENCY NOTES 1 1200 hours or 60 calendar months whichever occurs first except a AllC1 C14 C18 C28 C29 C31 C32 C33 and C45 propellers with plain no prefix or suffix blade serial numbers 00000 thru 21297 the overhaul frequency is 1000 hours or 60 calendar months whichever occurs first b All2A36C23 D2ZAF34C30 D3AF32C35 2AF34C55 3AF32C75 3A32C76 and 2A36C82 propellers with hub serial number 71XXXX and higher the overhaul frequency is 1500 hours or 60 calendar months whichever occurs first 2 1000 hours or 60 calendar months whichever occurs first except a All2D34C9 propellers with hub serial number 71XXXX and higher the overhaul frequency is 1500 hours or 60 calendar months whichever occurs first 3 1500 hours or 60 calendar months whichever occurs first except a Agricultural ai
7. mandatory specified time between overhaul for propel lers governors and accumulators Specifications are based on hours of operation and calen dar time whichever occurs first The starting point for the calendar limit is the date of first installation on an engine not from date of manufacture or overhaul Date of manufacture overhaul or removal from service is applicable when determining long term storage inspec tions NOTE Calendar month is the period of time from the first day of a month to the last day of the month When the term calendar month is used compliance can be achieved at any time during the month up to and including the last day of the month For Ex ample a propeller with a 60 calendar month inspection interval is inspected and approved upon any given day of the month This propeller will become due for inspection upon the last day of the same month 60 months later All deviations from published TBOs must be approved by your local Regulatory Authority with a recommendation from McCauley If the propeller governor or accumulator is in storage in excess of two years additional in spections are required Once installed on an aircraft the propeller governor or accumulator calendar limit is not interrupted by subsequent removal and or storage Propeller governor and accumulator overhaul should as much as practical coincide with engine overhaul For example in a case where propeller TBO is 1500 hours and engine TBO
8. o replace all rubber seals and gaskets Total disassembly such as disassembling the flyweight assembly is not required unless evidence of corrosion warrants further disassembly WARNING COMPLETELY RELEASE ALL AIR OR NITROGEN PRESSURE BEFORE ANY DISASSEMBLY OF ACCUMULATOR REMOVAL OF RETAINING RINGS WITH AIR PRESSURE INSIDE THE CYLINDER WILL RESULT IN EXPLOSIVE BLOW OUT OF PARTS WITH DANGER OF SERIOUS IN JURY 2 Inspect parts for damage and corrosion repair replace parts as necessary a Critical inspection areas for governors are D of drive gear O D of the pilot spool and toes of flyweight Work must be accomplished only by a FAA approved governor repair station or international equivalent in accordance with the governor service manual Service Bulletin 137W Page 5 of 13 b Critical inspection area for accumulators is inside of cylinder for corrosion Work must be accomplished only by a FAA approved governor repair station or interna tional equivalent in accordance with the governor service manual 3 Test run the governor ona governor test bench to verify correct operation and check for leakage This must be accomplished only by a FAA approved governor repair station or international equivalent in accordance with the governor service manual 4 Pressure check accumulator to verify correct operation and check for leakage This must be accomplished only by a FAA approved governor repair station or international equivalent in a
9. rcraft installations the overhaul frequency is 1200 hours or 60 calendar months whichever occurs first 4 2000 hours or 72 calendar months whichever occurs first a Agricultural aircraft installations the overhaul frequency is 1200 hours or 60 calendar months whichever occurs first b Aerobatic installations the overhaul frequency is 1000 hours or 72 calendar months whichever occurs first 5 2400 hours or 72 calendar months whichever occurs first 6 3000 hours or 72 calendar months whichever occurs first 7 3500 hours or 72 calendar months whichever occurs first 8 5000 hours or 72 calendar months whichever occurs first 9 4000 hours or 72 calendar months whichever occurs first 10 5000 hours or 60 calendar months whichever occurs first 11 5000 hours or 60 calendar months whichever occurs first 10 000 hour life limit on blades and hub 12 5000 hours or 72 calendar months whichever occurs first 16 000 hour life limit on blades 13 4000 hours or 60 calendar months whichever occurs first 16 800 hour life limit on blades a 6000 hours or 60 calendar months whichever occurs first for those propellers with serial num bers higher than 931333 and those propellers serial number 931333 and lower modified per McCauley Service Letter 1993 12 16 800 hour life limit on blades Service Bulletin 137W Page 13 of 13 14 5000 hours or 60 calendar months whichever occurs first 14 500 hour life limit on blades 26 500 15
10. the appropriate propeller service manual Make logbook entry of compliance with Service Bulletin 137 X Service Bulletin 137W Page 4 of 13 Long Term Storage of Governors and Accumulators The following is applicable to new and overhauled governors or accumulators prior to entering service engine installation or at any time governor or accumulator is removed from service Storage time is determined from date of manufacture or overhaul or removal from aircraft A Storage must be in a clean and dry environment preferably in the original shipping carton and above ground level to minimize exposure to dirt and moisture B If storage period exceeds two 2 years before entering service or returning to service perform the following inspection 1 Inspectexternally for damage and corrosion 2 Test run the governor on a governor test bench to verify correct operation and check for leakage This must be accomplished only by a FAA approved governor repair station or international equivalent in accordance with the governor service manual 3 Pressure check accumulator to verify correct operation and check for leakage This must be accomplished only by a FAA approved governor repair station or international equivalent in accordance with the governor service manual C If storage period exceeds five 5 years before entering service or returning to service perform the following inspection and parts replacement 1 Disassemble as necessary t
11. turning to service perform the following inspection 1 For all propeller models inspect externally for damage and corrosion Inspection may be accomplished by an A amp P mechanic or international equilvalent Make logbook entry of compliance with Service Bulletin 137 X Fornon oil filled propeller models remove propeller cylinder inspect for internal corro sion and signs of deterioration and repair as necessary This must be accomplished only by aFAA approved propeller repair station or international equivalent in accor dance with the appropriate propeller service manual Make logbook entry of compli ance with Service Bulletin 137 X C Forall propeller models If storage period exceeds five 5 years before entering service or returning to service perform the following inspection and parts replacement 1 Disassemble as necessary to replace all rubber seals and lubricants Total disassem bly such as removing ferrules from blades is not required unless evidence of corrosion warrants further disassembly This must be accomplished only by a FAA approved propeller repair station or international equivalent in accordance with the appropriate propeller service manual Make logbook entry of compliance with Service Bulletin 137 X Inspect parts for damage and corrosion repair replace parts as necessary Work must be accomplished only by a FAA approved propeller repair station or international equivalent in accordance with
Download Pdf Manuals
Related Search