# Garrett TPE331-12UAR - Type: Engine model (FAA registry) - Registry code: 29089 - Manufacturer (registry): GARRETT - Model: TPE331-12UAR - Engine type: Turbo-prop - Power: 1,100 hp - Data sheet: [TCDS E4WE](https://openairdocs.org/tcds/E4WE) (OpenAirDocs) - Holder: Honeywell Aerospace US LLC - Installed in: 1 registered aircraft - Page: https://openairdocs.org/engine/garrett-tpe331-12uar 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 2018-17-15](https://openairdocs.org/ad/2018-17-15): Turbine Engine Combustion Section · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 39 more. Effective Oct 22, 2018 - [AD 2016-21-07](https://openairdocs.org/ad/2016-21-07): Fuel control drive · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 26 more. Effective Nov 28, 2016 - [AD 2011-18-51 R1](https://openairdocs.org/ad/2011-18-51-R1): Main shaft bearing · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 82 more. Effective Oct 19, 2011 - [AD 2006-14-03](https://openairdocs.org/ad/2006-14-03): New flight cycle counting method for first, second, and third-stage turbine rotors · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 48 more. Effective Aug 9, 2006 - [AD 2002-12-09](https://openairdocs.org/ad/2002-12-09): Spectrometric Oil Analysis Program (SOAP) Sampling of Oil and Filter, Gearbox Components · Honeywell International TPE331-11U, TPE331-12B, TPE331-12JR and 3 more. Effective Jul 3, 2002 - [AD 98-12-09](https://openairdocs.org/ad/98-12-09): Fuel Manifold · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 29 more. Effective Aug 7, 1998 - [AD 97-15-10](https://openairdocs.org/ad/97-15-10): Engine Inlet Ice Protection · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 39 more. Effective Sep 22, 1997 - [AD 95-16-08](https://openairdocs.org/ad/95-16-08): Life Limited Turbine Components · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 62 more. Effective Sep 5, 1995 - [AD 94-26-07](https://openairdocs.org/ad/94-26-07): Fuel Control Governor Drive · Honeywell International TPE331-10, TPE331-10A, TPE331-10B and 32 more. Effective Apr 18, 1995 - [AD 93-15-11](https://openairdocs.org/ad/93-15-11): Propeller Pitch Control (PPC) Gasket · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 58 more. Effective Sep 7, 1993 - [AD 93-02-01](https://openairdocs.org/ad/93-02-01): Stratoflex Fuel Manifold Assemblies · Honeywell International TPE331-10, TPE331-10A, TPE331-10B and 21 more. Effective Mar 18, 1993 Historical (superseded or no longer in force): - [AD 2018-02-14](https://openairdocs.org/ad/2018-02-14) (historical): Turbine Engine Combustion Section · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 38 more. Effective Feb 28, 2018 - [AD 2015-12-04](https://openairdocs.org/ad/2015-12-04) (historical): Fuel control unit (FCU) · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 26 more. Effective Jul 22, 2015 - [AD 2011-18-51](https://openairdocs.org/ad/2011-18-51) (historical): Main shaft bearing · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 82 more - [AD 2006-15-08](https://openairdocs.org/ad/2006-15-08) (historical): Woodward fuel control unit (FCU) assemblies · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 26 more. Effective Aug 24, 2006 - [AD 92-02-19 PL](https://openairdocs.org/ad/92-02-19-PL) (historical): Fuel Manifold Assembly Leak · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 29 more ## Information bulletins (advisory) (1) - [SAIB NE-16-18](https://openairdocs.org/saib/NE-16-18): Power Lever Loss of Power Control. Issued Jul 11, 2016 ## Registered aircraft (1) - [N145WF](https://openairdocs.org/aircraft/N145WF): [Aircraft Propulsion Leasing LLC](https://openairdocs.org/faa-owner/AIRCRAFT%20PROPULSION%20LEASING%20LLC), [Holland, OH](https://openairdocs.org/faa-place/OH/Holland), built 1993, S/N DC-824B ## 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 (71, newest 50) As reported by operators and repair stations, by the model named in the report. - [SDR 2026FA0000552](https://openairdocs.org/sdr/2026FA0000552), Jun 21, 2026: TUBE. CRACKED. AIRCRAFT EXPERIENCED A LOW OIL PRESSURE INDICATION AND ILLUMINATION OF THE OIL WARNING LIGHT ON THE RIGHT-HAND (RT) ENGINE DURING THE CRUISE PHASE OF FLIGHT 476 - [SDR CA110419009](https://openairdocs.org/sdr/CA110419009), Apr 18, 2011: RELAY. FAILED. (CAN) DURING START TEST THE STARTER WOULD NOT DISENGAGE WHEN THE START BUTTON WAS RELEASED. THE GPU HAD TO BE DISCONNECTED FOR STARTER TO DISENGAGE. START RELAY - [SDR O3X020109442](https://openairdocs.org/sdr/O3X020109442), Feb 11, 2005: LINE. BURST. AIRCRAFT WAS ENROUTE, THE CREW NOTICED ONE HYDRAULIC GAUGE FLUCTUATING AND FINALLY GOING TO ZERO AND THE OTHER GAUGE AT ZERO. THEY WENT THROUGH THE PROCEDURES F - [SDR O3X004129241](https://openairdocs.org/sdr/O3X004129241), Dec 2, 2004: DOWNLOCK SWITCH. OUT OF RIG. AIRCRAFT WAS ON APPROACH, THE GEAR WAS SELECTED DOWN. THE MAIN GEARS INDICATED DOWN AND LOCKED. NOSE LANDING GEAR INDICATE IN TRANSIT. THE GEAR WAS CYCLED AND T - [SDR 2004F00257](https://openairdocs.org/sdr/2004F00257), Dec 11, 2003: SHUTOFF VALVE. MALFUNCTIONED. CREW REPORTED ON REPOSITION FLIGHT FROM MIV TO ACY, WHILE BEING VECTORED TO APPROACH IN HEAVY TURBULENCE AND RAIN, THE LEFT ENGINE EXPERIENCED A LOSS OF POWER. - [SDR SABA011054](https://openairdocs.org/sdr/SABA011054), Oct 16, 2001: SCREW. OUT OF ADJ. AIRCRAFT 961 ON FLIGHT 5067 FROM CHARLOTTE TO ATHENS GA, ABORTED TAKEOFF DUE TO RIGHT ENGINE MAKING ONLY 80 PERCENT TORQUE. AIRCRAFT RETURNED TO GATE AND NO EME - [SDR SABA011051](https://openairdocs.org/sdr/SABA011051), Oct 5, 2001: ENGINE. POWER LOSS. FLIGHT 5214 FROM LEX TO CLT; THE LEFT ENGINE WOULD MAKE ONLY 10 PERCENT TORQUE. TAKEOFF WAS ABORTED. AIRCRAFT RETURNED TO GATE. GROUND RUN OF THE NUMBER ONE ENG - [SDR SABA010044](https://openairdocs.org/sdr/SABA010044), Aug 24, 2001: VALVE. BYPASSING. Aircraft 963 on flight 5100 from CLT to HTS. During takioff roll the left engine would not respond to power lever movement Takeoff was aborted. No evergency pro - [SDR 20010212SG011](https://openairdocs.org/sdr/20010212SG011), Dec 21, 2000: BEARING. SPALLED. BIL - FLT 2570 - RECEIVED CALL AND FAC FROM SOAP LAB ABOUT RESULTS FROM THE LAST OIL SAMPLE TAKEN. RECOMMENDED REMOVING ENGINE FROM SERVICE DUE TO M50 TOOL STEE - [SDR 20001011AP005](https://openairdocs.org/sdr/20001011AP005), Jun 25, 2000: COMBUSTION CHAMB. CRACKED. FLT 1310 - HRO - DURING TAKEOFF, THE ENGINE FIRE WARNING LIGHT CAME ON AT APPROXIMATELY 60 KTS, THE CREW ABORTED TAKEOFF AND THE FIRE WARNING LIGHT WENT OUT WHE - [SDR RAIA0006018](https://openairdocs.org/sdr/RAIA0006018), Jun 19, 2000: PRESSURE SWITCH. FAILED. 7270-STL- RIGHT BLEED FAULT LIGHT ILLUMINATED ON TAXI. MAINTENANCE INSPECTED AND REPLACED AIRFRAME DEICE PRESSURE SWITCH. - [SDR 20000602SH016](https://openairdocs.org/sdr/20000602SH016), May 7, 2000: ENGINE. FAILED. PNC - FLT 1314 - DURING CRUISE, CREW HEARD ABNORMAL NOISE DESCRIBED AS A BUMP. LT ENG STARTED OPERATING ERRATICALLY AND TORQUE DROPPED 40-50 PERCENT. SHORTLY AF - [SDR 20000614SH006](https://openairdocs.org/sdr/20000614SH006), May 7, 2000: BLADE. FAILED. PNC - FLT 1314 - DURING CRUISE, CREW HEARD ABNORMAL NOISE DESCRIBED AS A BUMP. LT ENG STARTED OPER ERRATICALLY, TORQUE DROPPED 40 TO 50 PERCENT, OIL PRESS DROPP - [SDR 20000717AP003](https://openairdocs.org/sdr/20000717AP003), May 7, 2000: BLADE. FAILED. FLT 1314 - PNC - DURING CRUISE, CREW HEARD AN ABNORMAL NOISE DESCRIBED AS A BUMP. THE LT ENG STARTED OPERATION ERRATICALLY AND TORQUE DROPPED 40 TO 50 PERCENT. - [SDR 20000816AP006](https://openairdocs.org/sdr/20000816AP006), May 7, 2000: TURBINE WHEEL. FAILED. FLT 1314 - PNC - DURING CRUISE, CREW HEARD AN ABNORMAL NOISE DESCRIBED AS A BUMP. THE LT ENGINE STARTED OPERATING ERRATICALLY AND TORQUE DROPPED 40 TO 50 PERCEN - [SDR 20001005AP008](https://openairdocs.org/sdr/20001005AP008), May 7, 2000: STATOR. DAMAGED. PNC - FLT 1314 - DURING CRUISE, CREW HEARD AN ABNORMAL NOISE DESCRIBED AS A BUMP. THE LEFT ENGINE STARTED OPERATING ERRATICALLY AND TORQUE DROPPED 40 TO 50 PERC - [SDR 20000602SH018](https://openairdocs.org/sdr/20000602SH018), Apr 14, 2000: GEARBOX. FAILED. LIT - FLT 1313 - CRUISE FLT, PILOT HEARD LOUD BANG, CABIN STARTED TO FILL WITH SMOKE. RT ENG RPM INCREASED ABOVE REDLINE. CREW SHUT DOWN RT ENG, RT BLEED. CABIN - [SDR 20000614SH003](https://openairdocs.org/sdr/20000614SH003), Apr 14, 2000: GEAR. BROKEN. LIT - FLT 1313 - IN CRUISE FLIGHT, PILOTS HEARD A LOUD BANG, CABIN STARTED TO FILL WITH SMOKE. RT ENG RPM INCREASED ABOVE REDLINE. CREW SHUT DOWN RT ENG, RT BLE - [SDR 20000717AP001](https://openairdocs.org/sdr/20000717AP001), Apr 14, 2000: ENGINE. FOD. FLT 1313 - LIT - WHILE IN CRUISE, THE PILOTS HEARD LOUD BANG, AND CABIN STARTED TO FILL WITH SMOKE. RT ENG RPM INCREASED ABOVE REDLINE. CREW SHUTDOWN RT ENG AND - [SDR 20001005AP009](https://openairdocs.org/sdr/20001005AP009), Apr 14, 2000: GEAR. FAILED. FLT 1313 - LIT - WHILE IN CRUISE FLIGHT, THE PILOTS HEARD A LOUD BANG, AND THE CABIN STARTED TO FILL WITH SMOKE. RT ENG RPM INCREASED ABOVE REDLINE. CREW SHUTDO - [SDR RAIA0003009](https://openairdocs.org/sdr/RAIA0003009), Mar 12, 2000: SWITCH. FAILED. 7478-STL -LEFT FUEL PRESSURE CAPTION ILLUMINATED ON TAKEOFF ROLL. MAINTENANCE INSPECTED AND DEFERRED PER MEL. MAINTENANCE REPLACED LEFT ENGINE FUEL PRESSURE SWI - [SDR RAIA0002023](https://openairdocs.org/sdr/RAIA0002023), Feb 26, 2000: SWITCH. FAILED. 7209 - FWA - LEFT FUEL PRESSURE CAPTION ILLUMINATED ON TAKEOFF ROLL ALL OTHER ENGINE INDICATIONS NORMAL. MAINTENANCE INSPECTED AND DEFERRED LEFT ENGINE FUEL PRE - [SDR RAIA0001006](https://openairdocs.org/sdr/RAIA0001006), Jan 3, 2000: ENGINE. FAILED. 735 - STL - RIGHT ENGINE MADE AN UNCOMMANDED SHUTDOWN. MAINTENANCE REPLACED RIGHT ENGINE. - [SDR RAIA9910034](https://openairdocs.org/sdr/RAIA9910034), Oct 25, 1999: FUEL PUMP. FAILED. 4797-MRY- RIGHT FUEL CAP LIGHT CAME ON AND RIGHT FUEL PRESS LOW. MAINTENANCE REPLACED RIGHT ENGINE FUEL PUMP. - [SDR AU990137](https://openairdocs.org/sdr/AU990137), Feb 12, 1999: FITTING. CRACKED. (AUS) HORIZONTAL STABILIZER ACTUATOR ATTACHMENT LUG CRACKED. - [SDR RAIA990214](https://openairdocs.org/sdr/RAIA990214), Feb 11, 1999: FUEL LINE. FAILED. FLT 7424 - STL - RIGHT ENGINE FUEL PUMP LIGHT ILLUMINATED. MAINTENANCE REPLACED MAIN FUEL LINE ON RIGHT ENGINE. (M) - [SDR AU990095](https://openairdocs.org/sdr/AU990095), Feb 10, 1999: VALVE. FAULTY. (AUS) ANTI-SKID BRAKE CONTROL VALVE SUSPECT FAULTY. PART TC: 2,825. - [SDR AU990144](https://openairdocs.org/sdr/AU990144), Feb 8, 1999: TRANSMITTER. FAULTY. (AUS) NR 1 FUEL PRESSURE TRANSMITTER FAULTY. PART TC: 8,971. - [SDR RAIA980702](https://openairdocs.org/sdr/RAIA980702), Jul 1, 1998: SCREW. LOOSE. FLT 7466 - STL - RIGHT SPEED LEVER LINKAGE SELF LOCKING ALLEN HEAD FASTENER LOOSENED CAUSING LINKAGE TO SEPARATE FROM UNDER SPEED FUEL GOVERNOR SPLINE. MAINTENA - [SDR RAIA980613](https://openairdocs.org/sdr/RAIA980613), Jun 25, 1998: ENGINE. MALFUNCTIONED. FLT 7045 - STL - LEFT ENGINE SINGLE RED LINE COMPUTER CAPTION ILLUMINATED ON TAKEOFF ROLL. MAINTENANCE DEFERRED 76-1 CAT C. (M) - [SDR SABA980019](https://openairdocs.org/sdr/SABA980019), Mar 15, 1998: FUEL CONTROL. FAILED. SOP - FLT 5022 - ON FLIGHT FROM CLT TO ISO, THE RT ENGINE RPM DROPPED AND FUEL CAPTION LIGHT CAME ON. AIRCREW COULD NOT REGAIN POWER, SO THE ENGINE WAS SHUT DOW - [SDR RAIA970621](https://openairdocs.org/sdr/RAIA970621), Jun 24, 1997: COMPRESSOR. FAILED. STL - FLT 7069 - RIGHT ENGINE DID NOT ACHIEVE TARGET TORQUE ON TAKEOFF. MAINTENANCE REPLACED RIGHT ENGINE DUE TO COMPRESSOR AND HOT SECTION DEGRADATION. (X) - [SDR VTZA96364](https://openairdocs.org/sdr/VTZA96364), Sep 6, 1996: ENGINE. FLAMED OUT. IAD/ISP - FLT 6168 - DURING CRUISE AT 1415 HOURS ON 9-6-96, MADE AN UNSCHEDULED LANDING DUE TO RT ENGINE FLAME OUT IN-FLIGHT. AIRCRAFT RETURNED TO GATE WITH NO - [SDR WWMA9600039](https://openairdocs.org/sdr/WWMA9600039), Apr 22, 1996: BLEED AIR GASKET. DEFECTIVE. THE RIGHT ENGINE HAD FLUCTUATING AND LOW TORQUE ON CLIMBOUT. AIRCRAFT RETURNED TO FIELD WITHOUT INCIDENT. MAINTENANCE FOUND A DAMAGED BLEED AIR GASKET ON THE RI - [SDR 96ZZZM689](https://openairdocs.org/sdr/96ZZZM689), Mar 23, 1996: ENGINE. FAILED. FLT NR 4567 - BNA - DURING CRUISE FLIGHT, THE RIGHT ENGINE TORQUE DROPPED TO 20 PERCENT AND THE RPM ROSE TO 120 PERCENT. THE CREW SHUT DOWN THE RIGHT ENGINE, DE - [SDR WTAA960050](https://openairdocs.org/sdr/WTAA960050), Mar 4, 1996: FUEL CONTL UNIT. FAILED. SFO - NR 2 ENGINE FAILED TO ACHIEVE REQUIRED TORQUE ON TAKEOFF ROLL. TAKEOFF ABORTED WITHOUT INCIDENT. MAINTENANCE DEFERRED TTL SYSTEM PER MEL 76-2. ENGINE OPER - [SDR RAIA960136](https://openairdocs.org/sdr/RAIA960136), Jan 21, 1996: FUEL CONTROL. OUT OF ADJUST. STL - FLT 7058 - LEFT ENGINE WOULD ONLY ACHIEVE 97.5 PERCENT RPM. MAINTENANCE ADJUSTED SCREW 'X', PERFORMED GROUND RUNS, OPERATIONAL CHECK GOOD. ENGINE TT, 9,06 - [SDR RAIA960133](https://openairdocs.org/sdr/RAIA960133), Jan 19, 1996: FUEL CONTROL. OUT OF ADJUST. BMI - FLT 7325 - LEFT ENGINE RPM WOULD NOT COME ABOVE 98.5 PERCENT - 99 PERCENT ON TAKEOFF. FERRY FLIGHT TO STL. MAINTENANCE ADJUSTED RPM, GROUND RUNS GOOD. ENG - [SDR 96ZZZX1404](https://openairdocs.org/sdr/96ZZZX1404), Jan 18, 1996: GASKET. LEAKING. DFW/WDG - FLT 1260 - WHILE EN ROUTE, LT ENGINE LOST ALL OIL PRESSURE. THE PILOT SHUT DOWN LT ENGINE AND PROCEEDED TO DFW WHERE HE LANDED WITHOUT FURTHER INCIDEN - [SDR RAIA960119](https://openairdocs.org/sdr/RAIA960119), Jan 14, 1996: GASKET. FAILED. STL - FLT 7260 - LEFT ENGINE WOULD NOT MAKE TARGET TORQUE. MAINTENANCE REPLACED P3 GASKETS, GROUND RUNS GOOD. ENGINE TT, 5,973.2 HOURS. (X) - [SDR RAIA960114](https://openairdocs.org/sdr/RAIA960114), Jan 10, 1996: ANTI-ICE VALVE. FAULTY. STL - FLT 7492 - RIGHT ENGINE ANTI-ICE FAILED IN-FLIGHT. CIRCUIT BREAKER WOULD NOT RESET. MAINTENANCE REPLACED RIGHT ENGINE ANTI-ICE VALVE, OPERATION CHECK GOOD - [SDR 96ZZZX766](https://openairdocs.org/sdr/96ZZZX766), Jan 8, 1996: ROTATING SEAL. FLANGE CRACKED. DURING SCHEDULED HOT SECTION INSPECTION, FOUND PART CRACKED AT SEAL FLANGE. NO SIGNS OF ABNORMAL OPERATION WERE EVIDENT. SUBMITTER STATED THIS IS A CRITICAL LIF - [SDR 96ZZZX813](https://openairdocs.org/sdr/96ZZZX813), Jan 3, 1996: ROTATING SEAL. FLANGE CRACKED. DURING INSPECTION FOR METAL CONTAMINATION, FOUND PART CRACKED AT SEALING FLANGE. THIS IS A CRITICAL LIFE-LIMITED COMPONENT. LIFE-LIMIT IS 20,000 CYCLES. SUBMITT - [SDR 96ZZZX652](https://openairdocs.org/sdr/96ZZZX652), Dec 24, 1995: TURBINE. DAMAGED. CREW WHILE PERFORMING FIRST FLIGHT OF DAY CHECKS (ON GROUND, TTL PORTION OF CHK), NOTED A LOUD POP FROM LT ENGINE FOLLOWED BY SMOKE FROM ENG COWLS. STOP & FEATH - [SDR 96ZZZX487](https://openairdocs.org/sdr/96ZZZX487), Dec 7, 1995: SEAL. CRACKED. DURING SCHEDULED HOT SECTION INSPECTION, FOUND SEAL CRACKED AT SEALING FLANGE. THIS IS A CRITICAL LIFE LIMITED COMPONENT. LIFE LIMIT IS 20,000 CYCLES. SUBMITTER - [SDR 96ZZZX814](https://openairdocs.org/sdr/96ZZZX814), Dec 7, 1995: ROTATING SEAL. FLANGE CRACKED. DURING SCHEDULED HOT SECTION INSPECTION, FOUND PART CRACKED AT FLANGE. THIS IS A CRITICAL LIFE-LIMITED COMPONENT. LIFE-LIMIT = 20,000 CYCLES. THIS IS THE 23RD M - [SDR 96ZZZX97](https://openairdocs.org/sdr/96ZZZX97), Nov 27, 1995: SEAL. CRACKED. DURING SCHEDULED CAM INSPECTION, FOUND PART CRACKED AT FLANGE. THIS IS A MAIN ROTATING GROUP, CRITICAL LIFE-LIMITED COMPONENT. LIFE-LIMIT IS 20,000 CYCLES. SUGG - [SDR 95ZZZX6601](https://openairdocs.org/sdr/95ZZZX6601), Nov 11, 1995: SEAL. CRACKED. DURING HOT SECTION INSPECTION, FOUND SEAL FLANGE CRACKED 8 PLACES. SUBMITTER STATED THIS IS A CRITICAL MAIN ROTATING GROUP LIFE-LIMITED COMPONENT. LIFE-LIMIT IS - [SDR 96ZZZX96](https://openairdocs.org/sdr/96ZZZX96), Nov 11, 1995: SEAL. CRACKED. DURING CAM INSPECTION, FOUND SEAL CRACKED AT SEAL FLANGE IN 7 PLACES. THIS IS A CRITICAL MAIN ROTATING GROUP LIFE-LIMITED COMPONENT. CURRENT LIFE LIMIT IS 20,00 - [SDR WWMA9500080](https://openairdocs.org/sdr/WWMA9500080), Nov 3, 1995: FUEL SYST. MALFUNCTIONED. DURING LANDING ROLLOUT, WHEN POWER LEVERS WERE PLACED IN REVERSE THE RIGHT ENGINE SHUT ITSELF DOWN. MAINTENANCE PERFORMED GROUND RUNS AND WAS UNABLE TO DUPLICAT All 71: https://openairdocs.org/engine/garrett-tpe331-12uar/reports.md ## STCs that may be installed (OpenAirDocs) (1) Approved for this engine model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has. - [STC SE00265AT](https://openairdocs.org/stc/SE00265AT): Install Ayres Fuel Manifold Purge Assembly Kit, P/N 21757-1 in accordance with "Installation Instructions - Ayres P/N 21757-1 Fuel Manifold Purge Assy-Kit" Dwg. No. 21757-1(1), Revision none, dated April 20, 1993, or later FAA approved revision. Thrush Aircraft Inc --- 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.