# Alliance TPE331-2 - Type: Engine model (FAA registry) - Registry code: 01648 - Manufacturer (registry): ALLIANCE - Model: TPE331-2 - Engine type: Turbo-prop - Power: 715 hp - Data sheet: [TCDS E3WE](https://openairdocs.org/tcds/E3WE) (OpenAirDocs) - Holder: Honeywell Aerospace US LLC - Installed in: 0 registered aircraft - Page: https://openairdocs.org/engine/alliance-tpe331-2 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 2018-13-05](https://openairdocs.org/ad/2018-13-05): Turbine Engine Reduction Gear · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 18 more. Effective Jul 26, 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 2002-21-15](https://openairdocs.org/ad/2002-21-15): Second stage turbine stator inner seal support · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 9 more. Effective Nov 26, 2002 - [AD 98-04-15](https://openairdocs.org/ad/98-04-15): Turbine Stators · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 9 more. Effective Apr 27, 1998 - [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 94-09-08](https://openairdocs.org/ad/94-09-08): Third Stage Stator Turbine Assemblies · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 7 more. Effective May 20, 1994 - [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 92-26-08](https://openairdocs.org/ad/92-26-08): Third Stage Stator Assemblies · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 7 more. Effective Jul 15, 1993 - [AD 93-05-09](https://openairdocs.org/ad/93-05-09): Third Stage Turbine Stator Assemblies · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 9 more. Effective Jun 28, 1993 - [AD 89-07-07 R1](https://openairdocs.org/ad/89-07-07-R1): Oil Scavenge Pump Assembly · Honeywell International TPE331-1, TPE331-10, TPE331-10R and 26 more. Effective Oct 30, 1989 - [AD 84-10-06 R1](https://openairdocs.org/ad/84-10-06-R1): Fuel Pump Assemblies · Honeywell International TPE331-1, TPE331-10, TPE331-10B and 45 more. Effective Dec 26, 1984 - [AD 84-01-04](https://openairdocs.org/ad/84-01-04): Third Stage Turbine Wheels · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 11 more. Effective Jan 25, 1984 - [AD 73-26-07 R3](https://openairdocs.org/ad/73-26-07-R3): Fuel Pump Shaft Internal Drive Splines · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 39 more. Effective Jul 31, 1980 - [AD 78-25-08 R3](https://openairdocs.org/ad/78-25-08-R3): Turbine Rotor · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 11 more. Effective Jun 12, 1980 - [AD 78-05-02](https://openairdocs.org/ad/78-05-02): Propeller Pitch Control Cam Follower Pin · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 11 more. Effective Apr 5, 1979 - [AD 76-16-01](https://openairdocs.org/ad/76-16-01): Bearing Oil Transfer Tube · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 11 more. Effective Aug 6, 1976 - [AD 75-10-05](https://openairdocs.org/ad/75-10-05): Torque Sensor Assembly Mounting Arm · Honeywell International TPE331-1, TPE331-2, TPE331-3U and 3 more. Effective Jul 11, 1975 - [AD 74-10-10](https://openairdocs.org/ad/74-10-10): Fuel Control Assembly Support Bracket · Honeywell International TPE331-1, TPE331-2, TPE331-3U and 2 more. Effective Jul 11, 1975 - [AD 70-19-02](https://openairdocs.org/ad/70-19-02): High Speed Pinion Bearings · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 3 more. Effective Feb 20, 1974 - [AD 71-05-07](https://openairdocs.org/ad/71-05-07): High Speed Pinion Assembly · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 30 more. Effective Apr 8, 1972 - [AD 70-04-04](https://openairdocs.org/ad/70-04-04): High Speed Pinion Retaining Nut · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 3 more 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 91-04-02](https://openairdocs.org/ad/91-04-02) (historical): Third stage stator assembly · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 7 more - [AD 90-21-01](https://openairdocs.org/ad/90-21-01) (historical): Third stage stator assembly · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 7 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 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 (6) As reported by operators and repair stations, by the model named in the report. - [SDR KY7A20130128001](https://openairdocs.org/sdr/KY7A20130128001), Jan 24, 2013: FCU. FAILED. ON CLIMB THROUGH 14000, FLIGHT CREW NOTED ENGINE TEMPERATURE INCREASING AND TTL BYPASS SYSTEM ACTIVATION. POWER LEVER MOVEMENT HAD NO EFFECT ON ENGINE AND FLIGH - [SDR AU510001574](https://openairdocs.org/sdr/AU510001574), Oct 7, 2005: SPAR. CRACKED. WING SPAR INNER WEB CUTOUT CRACKED IN THREE PLACES. THREE CRACKS WERE FOUND IN THE STARBOARD INNER WEB STRINGER 13 CUTOUT MEASURING 12.7MM (0.5IN), 3.175MM (0.1 - [SDR AU510002221](https://openairdocs.org/sdr/AU510002221), Aug 12, 2005: LINE. CRACKED. LT ENGINE FUEL PIPE LOCATED BETWEEN THE START PRESSURE REGULATOR AND THE FUEL FLOW TRANSMITTER CRACKED AND LEAKING. - [SDR 03062311](https://openairdocs.org/sdr/03062311), Mar 3, 2003: LIGHT. INOPERATIVE. DURING PREFLIGHT INSPECTION THE CREW REPORTED THAT THE LEFT FORWARD AND AFT EMERGENCY EXIT LIGHTS WERE INOPERATIVE. MAINTENANCE PERSONNEL CLEANED THE LAMP SOCKE - [SDR 98ZZZX1639](https://openairdocs.org/sdr/98ZZZX1639), Apr 2, 1998: PLATE LOCK. FAILED. BOLTS ATTACHING THE FIRST STAGE IMPELLER SHROUD TO THE IMPELLER HOUSING WERE FOUND LOOSE AND MISSING DURING A ROUTINE ENGINE INSPECTION. THESE BOLTS USE A LOCK - [SDR VTZA97419](https://openairdocs.org/sdr/VTZA97419), Jul 18, 1997: ENGINE. LOW POWER. IAD/GSO - FLT 6414 - DURING TAKEOFF AT 1540 HOURS ON 7-18-97, ABORTED TAKEOFF DUE TO LT ENGINE WOULD NOT MAKE TAKEOFF TORQUE. AIRCRAFT RETURNED TO GATE WITH NO ## STCs that may be installed (OpenAirDocs) (2) 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 - [STC SE383CH](https://openairdocs.org/stc/SE383CH): Modification of engines. National Flight Services, Inc ## PMA parts (OpenAirDocs) (169, 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. - [893579-1HP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID146766403720250813163429.0001): Bushing. Central Texas Aircraft Parts (CTAP) · PMA PQ0880SW · Replaces 893579-1 · Aug 4, 2025 - [3101759-4HP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID104626277420250807175053.0001): Bushing. Central Texas Aircraft Parts (CTAP) · PMA PQ0880SW · Replaces 3101759-4 · Aug 4, 2025 - [967659-4ACD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID123352496420250303153208.0001): Seat-Valve. Aircraft Component Design LLC · PMA PQ2138NE · Replaces 967659-4 · Feb 20, 2025 - [1010-808ACD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID186320971520240926215357.0001): Washer. Aircraft Component Design LLC · PMA PQ2138NE · Replaces 1010-808 · Sep 5, 2024 - [3003-348ACD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID133544675020240926215358.0001): Shim. Aircraft Component Design LLC · PMA PQ2138NE · Replaces 3003-348 · Sep 5, 2024 - [3210-100ACD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID109913645120240926215358.0001): Washer. Aircraft Component Design LLC · PMA PQ2138NE · Replaces 3210-100 · Sep 5, 2024 - [AAP-1410- 628](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID176846208520240515131435.0001): Thrust Bearing. Approved Air Parts Co Inc · PMA PQ4173NE · Replaces Woodward P/N: 1410-628 used in… · May 6, 2024 - [AAP-1415- 336](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID136948528220240424190520.0001): Thrust Bearing. Approved Air Parts Co Inc · PMA PQ4173NE · Replaces Woodward P/N: 1415-336 used in… · Apr 17, 2024 - [AAP-1415- 336](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID111511963520240424190519.0001): Thrust Bearing. Approved Air Parts Co Inc · PMA PQ4173NE · Replaces Woodward P/N: 1415-336 used in… · Apr 17, 2024 - [S9413-012WE](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID164716779820240919135854.0001): Packing, Preform - Fluorocarbon. Wencor, LLC · PMA PQ1370NM · Replaces S9413-012 · Sep 11, 2023 - [866759-1TX](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID131334739220230314100841.0001): Ring. Central Texas Aircraft Parts (CTAP) · PMA PQ0880SW · Replaces 866759-1 · Mar 13, 2023 - [1390-136ACD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID126399601920220405145935.0001): Diaphragm, Rolling. Aircraft Component Design LLC · PMA PQ2138NE · Replaces 1390-136 · Mar 8, 2022 - [3-1557-700](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID196662177220230718141054.0001): Bellows Face Seal. Rexnord Industries LLC · PMA PQ2030CE · Replaces 896494-3 · Mar 3, 2022 - [218095ACD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID732648720520220105142916.0001): Screw, Fil HD DR CRES. Aircraft Component Design LLC · PMA PQ2138NE · Replaces 218095 · Dec 22, 2021 - [3003-325ACD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID493521808820220105142917.0001): Shim, Laminated. Aircraft Component Design LLC · PMA PQ2138NE · Replaces 3003-325 · Dec 22, 2021 - [3204-059ACD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID181465244720220105142916.0001): Washer, CRES. Aircraft Component Design LLC · PMA PQ2138NE · Replaces 3204-059 · Dec 22, 2021 - [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID237879910202112281301070.0001): Aircraft Component Design LLC · PMA PQ2138NE · Dec 15, 2021 - [3003-325ACD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID419324450202201051428520.0001): Shim, Laminated. Torrington Distributors Inc · PMA PQ2067NE · Replaces 3003-325 · Dec 7, 2021 - [218095ACD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID286003867202201051428510.0001): Screw, Fil HD DR CRES. Torrington Distributors Inc · PMA PQ2067NE · Replaces 218095 · Dec 7, 2021 - [3204-059ACD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID109754381820220105142852.0001): Washer, CRES. Torrington Distributors Inc · PMA PQ2067NE · Replaces 3204-059 · Dec 7, 2021 - [S9413-214WE](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID170485473120240806154154.0001): Packing, Preform – Fluorocarbon. Wencor, LLC · PMA PQ1370NM · Replaces S9413-214 · Nov 19, 2021 - [S9413-214WE](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID156736086320221102020330.0001): Packing, Preform – Fluorocarbon. Wencor, LLC · PMA PQ1370NM · Replaces S9413-214 · Nov 19, 2021 - [1386-150ACD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID557144642520210910172005.0001): Seal. Aircraft Component Design LLC · PMA PQ2138NE · Replaces 1386-150 · Jul 20, 2021 - [3103590-2WE](https://drs.faa.gov/browse/excelExternalWindow/CD9F301C7FF4E37886258228007887AD.0001): Gear-Spur. Wencor LLC · PMA PQ1370NM · Replaces 3103590-2 · Nov 19, 2017 - [3103589-1WE](https://drs.faa.gov/browse/excelExternalWindow/96B4577E4AB3345B86258228007887AC.0001): Gear-Spur. Wencor LLC · PMA PQ1370NM · Replaces 3103589-1 · Nov 19, 2017 - [358894AL-1](https://drs.faa.gov/browse/excelExternalWindow/A8B885547F88F1DD8625836A00502CDB.0001): Bearing, Ball Supplement 91. Extex Engineered Products Inc · PMA PQ2203NM · Replaces 358894-1 · Sep 7, 2016 - [358348AL](https://drs.faa.gov/browse/excelExternalWindow/9B596539329FA2DD8625836A00502C90.0001): Bearing, Ball Supplement 77. Extex Engineered Products Inc · PMA PQ2203NM · Replaces 358348 · Sep 7, 2016 - [3103035-1WD](https://drs.faa.gov/browse/excelExternalWindow/FA474A67BED4D85786257F37005F57C2.0001): Bearing Set, Annular Ball. Wencor LLC (formerly Dixie Aerospace LLC) · PMA PQ1630CE · Replaces Honeywell 3103035-1 · Dec 14, 2015 - [3103585-1WD](https://drs.faa.gov/browse/excelExternalWindow/CBF0B872508D732D86257F37005F5BCD.0001): Bearing Set, Annular Ball. Wencor LLC (formerly Dixie Aerospace LLC) · PMA PQ1630CE · Replaces Honeywell 3103585-1 · Dec 14, 2015 - [3101405-1WD](https://drs.faa.gov/browse/excelExternalWindow/7722B07BA165087C86257F37005F59AE.0001): Bearing, Annular Ball. Wencor LLC (formerly Dixie Aerospace LLC) · PMA PQ1630CE · Replaces Honeywell 3101405-1 · Dec 14, 2015 - [3108098-1WD](https://drs.faa.gov/browse/excelExternalWindow/69F77033252EBA4086257F370070FAC2.0001): Bearing, Roller. Wencor LLC (formerly Dixie Aerospace LLC) · PMA PQ1630CE · Replaces Honeywell 3108098-1 · Dec 14, 2015 - [358894-1WD](https://drs.faa.gov/browse/excelExternalWindow/40878E9C47E4766686257F370070FB89.0001): Bearing Set, Annular Ball. Wencor LLC (formerly Dixie Aerospace LLC) · PMA PQ1630CE · Replaces Honeywell 358894-1 · Dec 14, 2015 - [358348WD](https://drs.faa.gov/browse/excelExternalWindow/38DD0CBA6D6F064386257F37005F5639.0001): Bearing, Ball, Annular. Wencor LLC (formerly Dixie Aerospace LLC) · PMA PQ1630CE · Replaces Honeywell 358348 · Dec 14, 2015 - [3101874-1PR](https://drs.faa.gov/browse/excelExternalWindow/5C18A8B926706AE686257C9400702D36.0001): Ring, Seal. Precision Ring, Inc. · PMA PQ2464CE · Replaces Allied P/N 3101874-1 · Feb 23, 2014 - [867680-1PR](https://drs.faa.gov/browse/excelExternalWindow/091CE5D75F2045F486257C9400703731.0001): Seal, Ring (Dia. 5.520 OD). Precision Ring, Inc. · PMA PQ2464CE · Replaces AlliedSignal P/N 867680-1 · Feb 23, 2014 - [P-1008](https://drs.faa.gov/browse/excelExternalWindow/AC95DA2533D58D1C86257B4000546D7D.0001): Element Assy. Western Filter A Division of Donalson Company Inc · PMA PQ1847NM · Replaces 897513-1, Alternate: 334508WFC · Mar 11, 2013 - [3103192-3WE](https://drs.faa.gov/browse/excelExternalWindow/123E407CF982DC40862579E2006BD7F7.0001): Gearshaft. Wencor LLC · PMA PQ1370NM · Replaces 3103192-3 · Feb 26, 2013 - [AS3145P](https://drs.faa.gov/browse/excelExternalWindow/DE1C00CB5E094F1F86257AD7006CF07C.0001): Sealant. Aerospace Sealants LLC · PMA PQ3886CE · Replaces GE 162, RTV 162, DOW 3145, RTV 3145 · Dec 9, 2012 - [AS106](https://drs.faa.gov/browse/excelExternalWindow/9BF65FF149C49D0D86257AD7006CF09E.0001): Sealant. Aerospace Sealants LLC · PMA PQ3886CE · Replaces GE 106, RTV 106 · Dec 9, 2012 - [AS159](https://drs.faa.gov/browse/excelExternalWindow/6F91E6B11B31244C86257AD7006CF074.0001): Sealant. Aerospace Sealants LLC · PMA PQ3886CE · Replaces GE 159, RTV 159, GE 106, RTV 106, Dow… · Dec 9, 2012 - [AS157](https://drs.faa.gov/browse/excelExternalWindow/4FF3AA8AF56BFB5586257AD7006CF077.0001): Sealant. Aerospace Sealants LLC · PMA PQ3886CE · Replaces GE 157, RTV 157, Dow 732, RTV 732 · Dec 9, 2012 - [AS3145](https://drs.faa.gov/browse/excelExternalWindow/4CC01A26D1DC5BD486257AD7006CF079.0001): Sealant. Aerospace Sealants LLC · PMA PQ3886CE · Replaces GE 162, RTV 162, DOW 3145, RTV 3145 · Dec 9, 2012 - [AS3145 & AS3145P](https://drs.faa.gov/browse/excelExternalWindow/FD2C033E3F15F47D86257AAD006A780A.0001): Sealant. Aerospace Sealants LLC · PMA PQ3886CE · Replaces GE 162, RTV 162, Dow 3145, RTV 3145 · Oct 23, 2012 - [AS159](https://drs.faa.gov/browse/excelExternalWindow/D052D5208644168B86257AAD006A7802.0001): Sealant. Aerospace Sealants LLC · PMA PQ3886CE · Replaces GE 159, RTV 159, GE 106, RTV 106, Dow… · Oct 23, 2012 - [AS106](https://drs.faa.gov/browse/excelExternalWindow/AACF134D7566072186257AAD006A784A.0001): Sealant. Aerospace Sealants LLC · PMA PQ3886CE · Replaces GE 106, RTV 106 · Oct 23, 2012 - [AS157](https://drs.faa.gov/browse/excelExternalWindow/2B691205ECAAB3D786257AAD006A7806.0001): Sealant. Aerospace Sealants LLC · PMA PQ3886CE · Replaces GE 157, RTV 157, Dow 732, RTV 732 · Oct 23, 2012 - [AS106](https://drs.faa.gov/browse/excelExternalWindow/BF98A7DB29BD440B862579F400625E1A.0001): Sealant. Aerospace Sealants LLC · PMA PQ3886CE · Replaces GE 106, RTV 106 · Apr 30, 2012 - [AC6091F8Y17](https://drs.faa.gov/browse/excelExternalWindow/E468D21265649D5186257A010056FEF6.0001): Fuel Filter Element. Pall Aeropower Corporation · PMA PQ1063CE · Replaces 897513-1 · Feb 26, 2012 - [358894-1WD](https://drs.faa.gov/browse/excelExternalWindow/FB6C8476E63B6ECD86257F3700702CC8.0001): Bearing Set, Annular Ball. Wencor LLC (formerly Dixie Aerospace LLC) · PMA PQ1630CE · Replaces Honeywell 358894-1 · Feb 2, 2012 - [370082-1WE](https://drs.faa.gov/browse/excelExternalWindow/074A478C7D2360D7862579D00064E2E6.0001): Plug. Wencor LLC · PMA PQ1370NM · Replaces 370082-1 · Jan 23, 2012 All of them: https://openairdocs.org/engine/alliance-tpe331-2/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.