# Allison 501-D13 - Type: Engine model (FAA registry) - Registry code: 03055 - Manufacturer (registry): ALLISON - Model: 501-D13 - Engine type: Turbo-prop - Power: 3,750 hp - Data sheet: [TCDS E-282](https://openairdocs.org/tcds/E-282) (OpenAirDocs) - Holder: Rolls-Royce Corporation - Installed in: 0 registered aircraft - Page: https://openairdocs.org/engine/allison-501-d13 Model codes come from the FAA registry's reference file. ## ADs that may apply (OpenAirDocs) Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [AD 2006-25-12](https://openairdocs.org/ad/2006-25-12): Removal from service of certain turbine rotor components · Rolls-Royce 501-D13, 501-D13A, 501-D13D and 6 more. Effective Jan 23, 2007 - [AD 86-17-06](https://openairdocs.org/ad/86-17-06): Thrust Sensitive Switch Assembly · Rolls-Royce 501-D13, 501-D13A, 501-D13D and 1 more. Effective Sep 15, 1986 - [AD 81-03-02](https://openairdocs.org/ad/81-03-02): 1st Stage Turbine Wheel · Rolls-Royce 501-D13, 501-D13A, 501-D13D and 2 more. Effective Jan 28, 1981 - [AD 80-14-13](https://openairdocs.org/ad/80-14-13): 1st Stage Turbine Wheels · Rolls-Royce 501-D13, 501-D13A, 501-D13D and 2 more. Effective Jul 10, 1980 - [AD 79-25-03](https://openairdocs.org/ad/79-25-03): Second, Third, And Fourth Stage Turbine Wheels · Rolls-Royce 501-D13, 501-D13A, 501-D13D and 2 more. Effective Dec 13, 1979 - [AD 78-09-09](https://openairdocs.org/ad/78-09-09): Third Or Fourth Stage Turbine Wheel · Rolls-Royce 501-D13, 501-D13A, 501-D13D and 2 more. Effective May 12, 1978 - [AD 75-22-05](https://openairdocs.org/ad/75-22-05): Second Stage Turbine Wheels · Rolls-Royce 501-D13, 501-D13A, 501-D13D and 2 more. Effective Oct 23, 1975 - [AD 75-17-32](https://openairdocs.org/ad/75-17-32): Second Stage Turbine Wheels · Rolls-Royce 501-D13, 501-D13A, 501-D13D and 2 more. Effective Aug 14, 1975 - [AD 69-21-03](https://openairdocs.org/ad/69-21-03): First Stage Compressor Wheels · Rolls-Royce 501-D13, 501-D13A, 501-D13D and 6 more. Effective Oct 21, 1969 - [AD 60-21-01](https://openairdocs.org/ad/60-21-01): Torquemeter Housing · Rolls-Royce 501-D13, 501-D13A, 501-D13D and 2 more. Effective Nov 9, 1960 - [AD 59-21-03](https://openairdocs.org/ad/59-21-03): Compressor Blade · Rolls-Royce 501-D13 and 501-D13A - [AD 59-18-01](https://openairdocs.org/ad/59-18-01): Low Speed Ground Idle · Rolls-Royce 501-D13 and 501-D13A - [AD 59-13-01](https://openairdocs.org/ad/59-13-01): Propeller Shaft Roller Bearing · Rolls-Royce 501-D13 and 501-D13A Historical (superseded or no longer in force): - [AD 2003-07-02](https://openairdocs.org/ad/2003-07-02) (historical): Turbine rotor components · 501-D13, 501-D13A, 501-D13D and 6 more. Effective May 7, 2003 ## Registered aircraft None registered with this engine model now. ## NTSB investigations None matched to aircraft with this engine model. ## FAA accident and incident reports None matched to aircraft with this engine model. ## Service difficulty reports (195, newest 50) As reported by operators and repair stations, by the model named in the report. - [SDR VGCA20231009001](https://openairdocs.org/sdr/VGCA20231009001), Oct 9, 2023: CLAMP. BROKEN. RH ENGINE ZONE 1 FIRE INDICATION AND LH ENGINE ZONE 2 FIRE INDICATION. FOUND RH TAILPIPE DISCONNECTED CAUSING RH ZONE 1 FIRE INDICATION. LH ZONE 2 FIRE INDICATI - [SDR VGCA20211119001](https://openairdocs.org/sdr/VGCA20211119001), Nov 19, 2021: NONE. NONE. DURING TAKE OFF, THE RH ENGINE RPM DROPPED TO 13,400. ENGINE RPM RECOVED WHEN PROP SYNC IS SELECTED OFF - [SDR VGCA20210606001](https://openairdocs.org/sdr/VGCA20210606001), Jun 6, 2021: SPAR. CORRODED. RH WING REAR SPAR UPPER RAIL CORRODED NEAR WS 2 AND WS 3. PERFORMED BLENDOUT IN THIS LOCATION PER ENGINEERING REPAIR - [SDR VGCA20210606002](https://openairdocs.org/sdr/VGCA20210606002), Jun 6, 2021: SKIN. GOUGED. GOUGE/DENT IN RIGHT WING LOWER SURFACE SKIN BEWTEEN WS 3 AND WS 4. PERFORMED REPAIR PER ENGINEERING REPAIR DRAWING. - [SDR VGCA20201125001](https://openairdocs.org/sdr/VGCA20201125001), Nov 25, 2020: FIRE LOOP. SHORTED. ZONE 3 (WHEEL WELL) FIRE WARNING ON NR 2 ILLUMINATED AFTER TAKE OFF. SHUT DOWN NR 2 ENGINE, DISCHARGED PRIMARY FIRE BOTTLES AND RETURNED TO KMIA. - [SDR CA190624019](https://openairdocs.org/sdr/CA190624019), Jun 22, 2019: LANDING GEAR. BINDING. (CAN) GEAR WAS SELECTED UP AND LEFT MAIN GEAR LIGHT REMAINED IN UNSAFE INDICATION. TRIED RECYCLING GEAR SEVERAL TIMES WITH NO LUCK, VISUALLY CONFIRMED GEAR WAS - [SDR CA190521035](https://openairdocs.org/sdr/CA190521035), May 19, 2019: BUNGEE. FAILED. (CAN) MAIN GEAR FAILED TO RETRACT AFTER TAKEOFF. OBTAINED SPECIAL FLIGHT PERMIT #192632-5 FLEW AIRCRAFT TO RED DEER ALBERTA FOR MAINTENANCE. FOUND BROKEN BUNGEE - [SDR VGCA20170919001](https://openairdocs.org/sdr/VGCA20170919001), Sep 19, 2017: ENGINE. OVERTEMP. LEFT ENGINE INDICATED HIGH TEMPERATURES WHICH COULD NOT BE IMMEDIATELY CONTROLLED BY POWER LEVER, EVENTUALLY TIT INDICATION WERE RETURNED TO NORMAL PARAMETERS. - [SDR VGCA20161212001](https://openairdocs.org/sdr/VGCA20161212001), Dec 12, 2016: ENGINE. SURGES. NR 2 ENGINE SURGED UNCONTROLLABLY. PRECAUTIONARY SHUTDOWN. - [SDR CA150703011](https://openairdocs.org/sdr/CA150703011), Jul 1, 2015: ENGINE. POWER LOSS. (CAN) UPON COMPLETION OF BOMB RUN (AIRCRAFT WAS PERFORMING FIRE SUPPRESSION ACTIVITIES), CLIMB OUT WAS INITIATED. THE AIRCRAFT PASSED THROUGH AN ERUPTION IN THE - [SDR CA150702007](https://openairdocs.org/sdr/CA150702007), Jun 28, 2015: COUPLING. FAILED. (CAN) SAFETY COUPLING ASSY. FAILED ON ENGINE START. - [SDR CA150625003](https://openairdocs.org/sdr/CA150625003), Jun 24, 2015: ACTUATOR. MALFUNCTIONED. (CAN) THE NR 2 ENG LOST POWER ON THE OVERSHOT FROM A BOMB RUN & WAS SHUTDOWN, RETURNED TO BASE. FOUND THE NR 2 PROPELLER ROTARY ACTUATOR TO BE OVER TRAVELLING. - [SDR CA150708009](https://openairdocs.org/sdr/CA150708009), Jun 24, 2015: SOLENOID. FAULTY. (CAN) BOMB TANK DOOR OPENED (UNCOMMANDED) DURING FLIGHT. MAINTENANCE FOUND AND REPLACED 2 FAULTY HYDRAULIC VALVE SOLENOIDS . CORRODED WIRE CONNECTIONS AT THE NR - [SDR CA150519026](https://openairdocs.org/sdr/CA150519026), May 15, 2015: LABYRINTH SEAL. LEAKING. (CAN) WHILE DEPARTING A FIRE, A LOWER THAN NORMAL OIL QTY ON ENGINE NR 2 WAS INDICATED. A PRECAUTIONARY ENGINE SHUTDOWN WAS CARRIED OUT. MAINTENANCE REPLACED TH - [SDR CA150519030](https://openairdocs.org/sdr/CA150519030), May 15, 2015: FITTING. CRACKED. (CAN) LOST OIL PRESSURE IN NR 3 ENGINE ON TAXI AFTER LANDING. MAINTENANCE NOTED CRACK AT RGB OIL PRESSURE INLET FITTING, DEFECTIVE ENGINE WAS REMOVED FOR FURTHE - [SDR CA150514003](https://openairdocs.org/sdr/CA150514003), May 12, 2015: WIRE. BROKEN. (CAN) DURING CLIMB AND CRUISE, THE FLIGHT CREW NOTED THE NR 4 ENGINE OIL QTY WAS LOW, INDICATING TWO GALLONS, A LOSS OF SIX GALLONS. NO SIGN OF FLUID LEAK WAS N - [SDR CA150513002](https://openairdocs.org/sdr/CA150513002), May 8, 2015: CLAMP. FAILED. (CAN) IN FLIGHT THE ACFT NR 2 ENG ZONE 1 FIRE WARNING LIGHT ILLUMINATED. THE FLIGHT CREW ACCOMPLISHED THE ENG FIRE DRILL & CHECKLIST PROCEDURES WHICH RESULTED I - [SDR CA150406006](https://openairdocs.org/sdr/CA150406006), Apr 2, 2015: TUBE. CRACKED. (CAN) DURING TRAINING FLIGHT, BALKED APPROACH AND AFTER COMPLETING THE CLIMB CHECKLIST, IT WAS NOTED THAT THE HYD FLUID QTY IN HYD SYS 1 WAS VERY LOW. THE SYSTE - [SDR CA140910006](https://openairdocs.org/sdr/CA140910006), Aug 22, 2014: BEARING. UNSERVICEABLE. (CAN) NUMBER 2 ENGINE RGB OIL PRESSURE INDICATION STARTED TO FLUCUATE, FOLLOWED SHORTLY BY, OIL PRESSURE LOW, WARNING LIGHT ILLUMINATING. SHORTLY THERE AFTER TH - [SDR CA140707015](https://openairdocs.org/sdr/CA140707015), Jul 3, 2014: VALVE. MALFUNCTIONED. (CAN) ON TAKEOFF LOW HORSEPOWER, HIGH FUEL FLOW, AND HIGH T.I.T. WERE OBSERVED. TAKEOFF WAS ABORTED PRIOR TO BRAKE RELEASE. MAINTENANCE FOUND SPEED SENSE VALVE - [SDR CA140630026](https://openairdocs.org/sdr/CA140630026), Jun 30, 2014: REDUCTION GB. MAKING METAL. (CAN) INCREASED CONSUMPTION OF OIL, LEAD TO INSPECTION OF RGB OIL SCREEN WHERE METAL PARTICLES WERE FOUND. ENGINE REMOVED FROM SERVICE. - [SDR CA140702010](https://openairdocs.org/sdr/CA140702010), Jun 24, 2014: GASKET. LEAKING. (CAN) NR 2 HYD SYS LOST ALL FLUID QTY. ACFT RETURNED TO THE AIRPORT. INSPECTED NR 2 HYDRAULIC SYSTEM, LEAK FOUND AT FILTER HOUSING, LEAKING GASKET FOUND AND REP - [SDR CA140613005](https://openairdocs.org/sdr/CA140613005), Jun 2, 2014: TACH GENERATOR. MALFUNCTIONED. (CAN) ON FIRE ACTION, NOTICED THE NR 2 ERPM GAUGE HAD BACKED OFF TO 13200 RPM. TIT, HP, FF AND HERTZ ALL READ NORMAL. THE MEL REQUIRES 4 ENGINE TACHOMETERS FUNC - [SDR CA140613007](https://openairdocs.org/sdr/CA140613007), May 9, 2014: PUMP. FAILED. (CAN) NR 1 HYDRAULIC SYS OVERHEAT LIGHT CAME ON IN FLIGHT COINCIDING WITH FAILED GENERATOR SDR 20140613006. - [SDR CA140613006](https://openairdocs.org/sdr/CA140613006), May 8, 2014: GENERATOR. FAILED. (CAN) NR 3 GENERATOR TRIPPED, UNDER-SPEED, TWICE, LT OFF. TEAR DOWN REPORT. - [SDR CA140423014](https://openairdocs.org/sdr/CA140423014), Mar 26, 2014: OIL COOLER. MALFUNCTIONED. (CAN) AFTER DEPARTURE, NR 2 ENGINE OIL TEMP WAS NOT CONTROLLABLE IN AUTO OR MANUAL MODE. ACFT RETURNED TO POINT OF DEPARTURE. NR 2 OIL TEMPERATURE WAS MAINTAINE - [SDR CA131104014](https://openairdocs.org/sdr/CA131104014), Nov 1, 2013: HOOK. DAMAGED. (CAN) ON CLIMB OUT, THE CABIN PRESSURE WAS RELEASED OUT THE AFT SERVICE DOOR. THE ACFT DIVERTED TO THE NEAREST MAINTENANCE FACILITY WHERE MAINTENANCE DISCOVERED - [SDR CA131015004](https://openairdocs.org/sdr/CA131015004), Oct 15, 2013: LEVER. CRACKED. (CAN) DURING MAINTENANCE INSPECTION THE NLG DOWN LATCH LEVER WAS FOUND CRACKED. THE LEVER WAS REPLACED AND THE ACFT WAS RETURNED TO SERVICE. - [SDR CA130813004](https://openairdocs.org/sdr/CA130813004), Aug 11, 2013: CONTROLLER. MALFUNCTIONED. (CAN) NR 4 ENGINE RPM DECAYED TO BOTTOM OF NORMAL RANGE AT HIGH POWER DURING TAKEOFF, BOMBING BUT WAS NORMAL IN CLIMB AND CRUISE. AFTER TROUBLESHOOTING THE ROTA - [SDR CA130729021](https://openairdocs.org/sdr/CA130729021), Jul 26, 2013: REGULATOR. MALFUNCTIONED. (CAN) PROPELLER FAILED TO GOVERN RPM IN FLIGHT. UPON ADVANCEMENT OF POWER FOR ASSOCIATED ENGINE FCU HAD TO LIMIT ENGINE RPM VIA FUEL TOPPING GOVERNOR. MAINTENAN - [SDR CA130515013](https://openairdocs.org/sdr/CA130515013), May 14, 2013: FIRE DETECTOR. MALFUNCTIONED. (CAN) PILOTS REPORTED A ZONE 1 FIRE INDICATION APPROXIMATELY 20 MILES FROM THE AIRPORT WHILE INBOUND FOR LANDING. AFTER PULLING THE POWER BACK TO IDLE NO CHANGE - [SDR CA130513023](https://openairdocs.org/sdr/CA130513023), May 9, 2013: TRANSFER TUBE. MISINSTALLED. (CAN) PROPELLER NOT REGULATING OIL PRESSURE IN FLIGHT. RPM WOULD SWING WITH POWER LEVER CHANGES. UPON INVESTIGATION IT WAS DISCOVERED THAT AN O-RING AND BACK-UP - [SDR CA120917016](https://openairdocs.org/sdr/CA120917016), Sep 13, 2012: ENGINE. POWER LOSS. (CAN) SECURED NR 1 ENGINE DURING CLIMBOUT. DURING CLIMBOUT, FLIGHT CREW HEARD A, POP/BANG. SCANNED ENGINE INSTRUMENTS AND NOTICED LOSS OF HORSEPOWER AND DECAYIN - [SDR CA120813031](https://openairdocs.org/sdr/CA120813031), Aug 5, 2012: FCU. MALFUNCTIONED. (CAN) WITH ENGINES RUNNING ON GRID IN HIGH PILOT DOWN SHIFTED TO LOW. NR 1 ENGINE EXPERIENCED A LEAN FUEL BLOW OUT. THIS OCCURED TWICE. FCU REPLACED FUNCTION CH - [SDR CA120716012](https://openairdocs.org/sdr/CA120716012), Jul 12, 2012: FUEL CONTROL. MALFUNCTIONED. (CAN) DURING CLIMB-OUT PHASE OF BOMBING RUN, WITH POWER LEVERS ADVANCED. CREW NOTICED HIGH TIT, LOW TORQUE AND ERRATIC RPM ON THE NR 2 ENGINE. AN ENGINE SHUTDOW - [SDR CA120712001](https://openairdocs.org/sdr/CA120712001), Jul 7, 2012: SOLENOID VALVE. FAILED. (CAN) WHILE ADVANCING POWER LEVER ON CLIMB OUT ENGINE TORQUE WAS UN-RESPONSIVE. THIS WAS CAUSE BY A FAULTY PROPELLER GOVERNING SYS THAT CAUSED THE ENGINE RPM TO - [SDR CA120517001](https://openairdocs.org/sdr/CA120517001), Apr 24, 2012: VALVE. FAULTED. (CAN) THE AIRCRAFT TAKEOFF, LT PROPELLER ENCOUNTERED AN UNDERSPEED SITUATION. THE ACFT RETURNED TO DEPARTURE. THE AME TROUBLESHOT THE PROBLEM, WE FOUND THE PITC - [SDR CA120404003](https://openairdocs.org/sdr/CA120404003), Mar 31, 2012: SWITCH. FAILED. (CAN) THE SNAG WAS REPORTED AS HAD A IN TRANSIT, UNSAFE GEAR LIGHT ON THE NLG AND LT MLG AFTER 45 SECONDS, BUMPED UP GEAR HANDLE UP TO ENSURE POSITIVE SELECTION - [SDR CA111115010](https://openairdocs.org/sdr/CA111115010), Nov 15, 2011: ACTUATOR. DAMAGED. (CAN) TANKER 484 HAD AN EXTERNALLY LEAKING RUDDER ACTUATOR. ON DIS-ASSEMBLY IT WAS DISCOVERED THAT THE PLUGS SERVING AS STOPS FOR A CYLINDER DIVIDER ASSEMBLY WE - [SDR CA111115011](https://openairdocs.org/sdr/CA111115011), Nov 15, 2011: COOLER. WRONG PART. (CAN) IMPROPER MAINTENANCE PERFORMED ON AIR-COOLER AND FUEL-COOLED, OIL COOLERS INFORMATION RECEIVED DURING A SUSPECTED UNAPPROVED PARTS INVESTIGATION REVEALED. - [SDR CA110829017](https://openairdocs.org/sdr/CA110829017), Aug 27, 2011: REGULATOR. FAULTY. (CAN) CREW REPORT - 800 DEGREE CHECKS OK, ADVANCED POWER AND STARTED TAKEOFF ROLE. TIT, FF AND POWER NORMAL, HOWEVER RPM INDICATION WAS DECAYING. TAKEOFF ABORTE - [SDR CA110714001](https://openairdocs.org/sdr/CA110714001), Jul 12, 2011: ENGINE. MALFUNCTIONED. (CAN) TAXIING TO TANKER BASE AFTER LANDING. ENGINE SHIFT-DOWN WAS SELECTED MOMENTARILY BY AIRCREW, HOWEVER ENGINE SPEED SOLENOID SWITCH WAS NOT GIVEN TIME TO LA - [SDR CA110602005](https://openairdocs.org/sdr/CA110602005), Jun 1, 2011: PULLEY. BROKEN. DURING INITIAL TAXI FOR A MX TEST FLIGHT, THE FLIGHT CREW RECEIVED A FLAP ASYMMETRIC WARNING. THE ACFT WAS RETURNED TO THE HANGAR WHERE UPON INITIAL INVESTIGATI - [SDR CA101129006](https://openairdocs.org/sdr/CA101129006), Nov 25, 2010: ARM. DAMAGED. DURING CLIMB-OUT FROM AIRPORT, THE PILOT REPORTED THAT THE GEAR UNLOCK LIGHT WAS ON AND SUSPECTED THE NLG AT FAULT. THEY COULD SEE DAYLIGHT THROUGH OUT THE VIEW - [SDR CA100531005](https://openairdocs.org/sdr/CA100531005), May 18, 2010: NUT. BROKEN. AFTER TAKEOFF FOR A FIRE DISPATCH , THE NR 1 FIRE LIGHT AND BELL SOUNDED. THE LIGHT AND BELL QUIT AFTER THE POWER WAS REDUCED FROM TAKEOFF POWER. AFTER LANDING - [SDR CA091118005](https://openairdocs.org/sdr/CA091118005), Nov 11, 2009: COMPRESSOR. DAMAGED. (CAN) ON START UP, ENG NR 2 IN HIGH SPEED WITH ALL THE PARAMETERS STABILIZED, WHEN CLEARED TO START NR 1 ENG, A LOUD BANG WAS HEARD FOLLOWED BY ENG FIRE WARNING - [SDR VGCA20090928](https://openairdocs.org/sdr/VGCA20090928), Sep 28, 2009: FUEL CONTROL. MALFUNCTIONED. FLAMEOUT OF NR 2 ENGINE DUE TO MECHANICAL MALFUNCTION OF FUEL SHUTOFF IN FUEL CONTROL. - [SDR CA090904012](https://openairdocs.org/sdr/CA090904012), Sep 4, 2009: ENGINE. MAKING METAL. ON CHECKING ENG OILS MX NOTICED NR 3 ENG TOOK MORE OIL THAN NORMAL, THEY NOTICE OIL COMING SCAVAGE PUMP DRAIN LINE. GEAR BOX FILTER CHECKED AND ABNORMAL METAL F - [SDR CA090824011](https://openairdocs.org/sdr/CA090824011), Aug 24, 2009: BRUSH BLOCK. WORN. ON RETURN NR4 ENG RPM DROOPED TO 13,600. WHILE REVIEWING CHECKLIST FOR POSSIBLE ENG SHUTDOWN, ENG DROOPED TO 13,450 AND BEGAN TO HAVE HORSEPOWER SURGES. ENG WAS - [SDR VGC2009F00001](https://openairdocs.org/sdr/VGC2009F00001), Aug 20, 2009: SPAR. CORRODED. CORROSION OF LT HORIZ STABILIZER REAR SPAR. (K) All 195: https://openairdocs.org/engine/allison-501-d13/reports.md ## PMA parts (OpenAirDocs) (over 1,000, first 50) Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this engine model on its data sheet, so check the FAA record before relying on it. Newest first. - [5232361P](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID176497882920260407171315.0001): Spray Tip-NozzleOuter. Pacific Sky Supply Inc · PMA PQ1255NM · Replaces 5232361 · Mar 11, 2026 - [5231719P](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID165490876420260407171315.0001): Spray Tip -NozzleInner. Pacific Sky Supply Inc · PMA PQ1255NM · Replaces 5231719 · Mar 11, 2026 - [5232367P](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID156087375720260407171315.0001): Spacer -NozzleSpray Tip. Pacific Sky Supply Inc · PMA PQ1255NM · Replaces 5232367 · Mar 11, 2026 - [5231692P](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID154315259120260407171316.0001): Spring -NozzleDirector. Pacific Sky Supply Inc · PMA PQ1255NM · Replaces 5231692 · Mar 11, 2026 - [5231689P](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID140048117120260407171316.0001): Director -NozzleSpray Tip. Pacific Sky Supply Inc · PMA PQ1255NM · Replaces 5231689 · Mar 11, 2026 - [5232362P](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID131402464820260407171315.0001): Spray TipAssembly -Nozzle. Pacific Sky Supply Inc · PMA PQ1255NM · Replaces 5232362 · Mar 11, 2026 - [211-326P](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID125354605420260305135806.0001): Filter Element Assembly. Donaldson Company Inc · PMA PQ2432CE · Replaces 6873547, 6871805 · Mar 3, 2026 - [6783872P](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID170886975520250404211601.0001): Shaft,Compressorextension. Pacific Sky Supply Inc · PMA PQ1255NM · Replaces 6783872 · Mar 26, 2025 - [6827848P](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID161394333120250404211602.0001): Gear Assy,CompressorExt Shaft &Side Gear. Pacific Sky Supply Inc · PMA PQ1255NM · Replaces 6827848 · Mar 26, 2025 - [6782685TT+.015](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID198849205620250102180403.0001): Plug, Oil Seal 0.750 Dia X 0.375 Long. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6782685+.015 · Jul 2, 2024 - [6782685TT+.005](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID198406910020250102180402.0001): Plug, Oil Seal 0.750 Dia X 0.375 Long. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6782685+.005 · Jul 2, 2024 - [6829392TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID197912735420250102180347.0001): Gear, Spur, Hydraulic Pump Idler Drive. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6829392 · Jul 2, 2024 - [6887148TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID192560985520250102180354.0001): Flange, Starter Shaft Bearing. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6887148 · Jul 2, 2024 - [23056999TT-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID191334320720250102180343.0001): Roller Sets, Spherical Planet Bearing. Turbo Technologies LLC · PMA PQ2318NM · Replaces 23056999-1 · Jul 2, 2024 - [23053857TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID191250019320250102180349.0001): Seal, Labyrinth, Rotating, Compressor Rear Primary. Turbo Technologies LLC · PMA PQ2318NM · Replaces 23053857 · Jul 2, 2024 - [6829393TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID190929031620250102180353.0001): Gear, Spur, Alternator Drive. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6829393 · Jul 2, 2024 - [6824043TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID186387820320250102180342.0001): Gear, Spur, Tachometer & Oil Pump Drive. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6824043 · Jul 2, 2024 - [23056962TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID185636051920250102180357.0001): Eyebolt, Reduction Gear. Turbo Technologies LLC · PMA PQ2318NM · Replaces 23056962 · Jul 2, 2024 - [6829896TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID182232096120250102180350.0001): Pin, Reduction Gear, Eyebolt. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6829896 · Jul 2, 2024 - [6846747TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID181477636120250102180347.0001): Shaft Assembly, Drive Tachometer. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6846747 · Jul 2, 2024 - [23056999TT-6](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID181362804820250102180344.0001): Roller Sets, Spherical Planet. Turbo Technologies LLC · PMA PQ2318NM · Replaces 23056999-6 · Jul 2, 2024 - [6845748TT-43](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID181267883820250102180351.0001): Gear, Spur-Starter. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6845748-43 · Jul 2, 2024 - [6782685TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID180695100120250102180402.0001): Plug, Oil Seal 0.750 Dia X 0.375 Long. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6782685 · Jul 2, 2024 - [23056999TT-5](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID179894934920250102180344.0001): Roller Sets, Spherical Planet. Turbo Technologies LLC · PMA PQ2318NM · Replaces 23056999-5 · Jul 2, 2024 - [23003504TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID179432922220250102180357.0001): Cuplock, Retention- Prop Shaft Thrust Nut Lock. Turbo Technologies LLC · PMA PQ2318NM · Replaces 23003504 · Jul 2, 2024 - [6829396TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178937992820250102180341.0001): Gear, Spur-Main Accessory Drive. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6829396 · Jul 2, 2024 - [23056999TT-4](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178137725220250102180344.0001): Roller Sets, Spherical Planet. Turbo Technologies LLC · PMA PQ2318NM · Replaces 23056999-4 · Jul 2, 2024 - [6854703TT-38](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID171454899420250102180349.0001): Gear, Spur, Hydraulic Pump Drive. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6854703-38 · Jul 2, 2024 - [6787342TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID169804341620250102180347.0001): Shaft Gear, .250 Square Drive. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6787342 · Jul 2, 2024 - [6845945TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID167884631120250102180348.0001): Bolt, Tie, Compressor. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6845945 · Jul 2, 2024 - [6794722TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID162311378320250102180349.0001): Seal, Labyrinth, Rotating, Compressor Rear Primary. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6794722 · Jul 2, 2024 - [6824044TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID161475209220250102180340.0001): Gear, Spur, Pump Drive Idler. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6824044 · Jul 2, 2024 - [6829397TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID160490625120250102180359.0001): Gear, Spur, Scavenge Pump. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6829397 · Jul 2, 2024 - [6792040TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID156471217520250102180354.0001): Cone, Inner Prop Brake. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6792040 · Jul 2, 2024 - [6782685TT+.010](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID155625825720250102180402.0001): Plug, Oil Seal 0.750 Dia X 0.375 Long. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6782685+.010 · Jul 2, 2024 - [6854397TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID154398759820250102180353.0001): Gear, Spur, Alternator Drive. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6854397 · Jul 2, 2024 - [23056999TT-3](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID142633724520250102180344.0001): Roller Sets, Spherical Planet. Turbo Technologies LLC · PMA PQ2318NM · Replaces 23056999-3 · Jul 2, 2024 - [6738444TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID141092233620250102180401.0001): Shaft, Accessory Idler Gear. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6738444 · Jul 2, 2024 - [6782685TT+.020](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID140723593320250102180403.0001): Plug, Oil Seal 0.750 Dia X 0.375 Long. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6782685+.020 · Jul 2, 2024 - [6829670TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID135080996620250102180357.0001): Member, Safety Coupling-Outer. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6829670 · Jul 2, 2024 - [6842119TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID132726204520250102180348.0001): Member, Safety Coupling-Intermediate. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6842119 · Jul 2, 2024 - [6899778TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID132096137820250102180346.0001): Ferrule, Crossover. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6899778 · Jul 2, 2024 - [6824214TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID131692517420250102180358.0001): Gear, Spur, Tachometer Drive Idler. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6824214 · Jul 2, 2024 - [23055550TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID131197886320250102180343.0001): Gear and Bearing Assembly, Planet. Turbo Technologies LLC · PMA PQ2318NM · Replaces 23055550 · Jul 2, 2024 - [6787344TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID129001373420250102180351.0001): Shaftgear, Accessory Drive Side. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6787344 · Jul 2, 2024 - [6854703TT-39](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID128231696820250102180349.0001): Gear, Spur, Hydraulic Pump Drive. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6854703-39 · Jul 2, 2024 - [19144TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID127898217820250102180352.0001): Plug, Oil Seal .750 Dia X .375 Long. Turbo Technologies LLC · PMA PQ2318NM · Replaces 19144 · Jul 2, 2024 - [6782790TT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID127765451720250102180401.0001): Shaft, Assembly, Slide Accessory Drive. Turbo Technologies LLC · PMA PQ2318NM · Replaces 6782790 · Jul 2, 2024 - [19144TT+.010](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID126082651420250102180352.0001): Plug, Oil Seal .750 Dia X .375 Long. Turbo Technologies LLC · PMA PQ2318NM · Replaces 19144 +.010 · Jul 2, 2024 - [18326TT+.010](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID125385565920250102180348.0001): Plug-Oil Seal 3/8 Dia x 5/16 Long (& Oversize). Turbo Technologies LLC · PMA PQ2318NM · Replaces 18326+.010 · Jul 2, 2024 All of them: https://openairdocs.org/engine/allison-501-d13/pma.md --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.