# N54PC: 1974 Mitsubishi MU-2B-26 - Status: Valid registration - Airframe: [Mitsubishi MU-2B-26](https://openairdocs.org/model/mitsubishi-mu-2b-26) (registry code 5780408, 9 seats) - Engine: [AiResearch TPE331 series](https://openairdocs.org/engine/airesearch-tpe331-series) (registry code 01514) - Serial number: 319 - Year built: 1974 - Type: Fixed wing multi engine - Engine type: Turbo-prop - Airworthiness: Standard, normal - Airworthiness date: December 18, 1974 - Certificate issued: October 14, 2025 - Expires: October 31, 2032 - Mode S code: A6D6DB - Registered owner: [Axel Neil Jeffery](https://openairdocs.org/faa-owner/AXEL%20NEIL%20JEFFERY) - Location: [Portland, OR](https://openairdocs.org/faa-place/OR/Portland) - Owner type: Individual - Owner's area on the map: 45.5032° N, 122.7703° W: Placed by OpenAirDocs at the center of ZIP code 97225, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=54PC - Page: https://openairdocs.org/aircraft/N54PC From the FAA registry file of October 22, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every AiResearch TPE331 model are included. ## ADs that may apply (OpenAirDocs): 71 in force ### Matched by airframe (Mitsubishi MU-2B-26) - [AD 2020-26-14](https://openairdocs.org/ad/2020-26-14): Propellers · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Feb 2, 2021 - [AD 2010-10-17](https://openairdocs.org/ad/2010-10-17): Airplane flight manual · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Jul 22, 2010 - [AD 2007-17-09](https://openairdocs.org/ad/2007-17-09): Elevator nose-down trim · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Sep 25, 2007 - [AD 2006-17-05](https://openairdocs.org/ad/2006-17-05): Flight checks of the rigging of the engine and propeller systems · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Sep 22, 2006 - [AD 2006-13-15](https://openairdocs.org/ad/2006-13-15): Wing attach barrel nuts, bolts · Mitsubishi Heavy Industries MU-2B-10, MU-2B-15, MU-2B-20 and 9 more. Effective Aug 11, 2006 - [AD 2005-18-20](https://openairdocs.org/ad/2005-18-20): "FASTprop" propeller de-icers · Hartzell PHC-C3YF-1RF/F8468A(B,K)-8R constant speed propeller (STC SA00718LA or 17 others). Effective Oct 14, 2005 - [AD 2005-01-19](https://openairdocs.org/ad/2005-01-19): Mode S transponders · GARMIN International GTX 330D, GTX 330, GTX 33D and 830 more. Effective Feb 23, 2005 - [AD 2003-22-07 R1](https://openairdocs.org/ad/2003-22-07-R1): AFM- forecast icing conditions · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Apr 16, 2004 - [AD 2003-17-04](https://openairdocs.org/ad/2003-17-04): Cockpit Windshield and Cabin Window · Mitsubishi Heavy Industries MU-2B-10, MU-2B-15, MU-2B-20 and 9 more. Effective Oct 3, 2003 - [AD 2000-09-15 R1](https://openairdocs.org/ad/2000-09-15-R1): Icing Conditions · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Jul 24, 2000 - [AD 98-25-02](https://openairdocs.org/ad/98-25-02): Top-mounted Antenna · Bell Helicopter Textron Canada 407, 172, 172A and 243 more. Effective Dec 22, 1998 - [AD 98-20-39](https://openairdocs.org/ad/98-20-39): Forward Attachment Fitting Bolt · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Nov 20, 1998 - [AD 96-25-02](https://openairdocs.org/ad/96-25-02): Airplane Flight Manual (AFM) - Icing Limitations · Mitsubishi Heavy Industries MU-2B-10, MU-2B-15, MU-2B-20 and 9 more. Effective Dec 27, 1996 - [AD 88-21-01 R1](https://openairdocs.org/ad/88-21-01-R1): Control Yoke · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Jan 28, 1989 - [AD 88-23-01](https://openairdocs.org/ad/88-23-01): Torque Tube Joints · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Dec 4, 1988 - [AD 88-13-01](https://openairdocs.org/ad/88-13-01): Autopilots · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Jul 11, 1988 - [AD 87-12-02](https://openairdocs.org/ad/87-12-02): Generator Shield Jumper Wires · Mitsubishi Heavy Industries MU-2B-25, MU-2B-26 and MU-2B-35. Effective Jul 3, 1987 - [AD 87-04-03](https://openairdocs.org/ad/87-04-03): Flap Flexible Shafts · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Mar 7, 1987 - [AD 86-26-02](https://openairdocs.org/ad/86-26-02): POH/AFM Appendix - Icing · Mitsubishi Heavy Industries MU-2B-10, MU-2B-15, MU-2B-20 and 9 more. Effective Dec 31, 1986 - [AD 86-20-01](https://openairdocs.org/ad/86-20-01): Pitot System Modification · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Oct 6, 1986 - [AD 86-15-03](https://openairdocs.org/ad/86-15-03): NLG Strut Assembly · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 6 more. Effective Aug 13, 1986 - [AD 84-25-02](https://openairdocs.org/ad/84-25-02): Trim Tab Brackets · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Dec 18, 1984 - [AD 84-12-04](https://openairdocs.org/ad/84-12-04): Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Jun 28, 1984 - [AD 83-09-02](https://openairdocs.org/ad/83-09-02): Strobe Light Assemblies · Mitsubishi Heavy Industries MU-2B-25, MU-2B-26, MU-2B-30 and 2 more. Effective May 17, 1983 - [AD 82-08-02](https://openairdocs.org/ad/82-08-02): Electrical Wiring Inspection · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 6 more. Effective Apr 15, 1982 - [AD 81-25-04 R1](https://openairdocs.org/ad/81-25-04-R1): Electrical Wiring Inspection · Mitsubishi Heavy Industries MU-2B-25, MU-2B-26, MU-2B-26A and 4 more. Effective Jan 21, 1982 - [AD 81-06-01 R1](https://openairdocs.org/ad/81-06-01-R1): Engine Aft Nacelles · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 3 more. Effective Apr 1, 1981 - [AD 79-24-02](https://openairdocs.org/ad/79-24-02): Outer Fuel Tank Wiring · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Nov 21, 1979 - [AD 78-03-05](https://openairdocs.org/ad/78-03-05): Cowling Latches · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 6 more. Effective Feb 23, 1978 - [AD 75-03-06](https://openairdocs.org/ad/75-03-06): Cracks and Optical Distortion · Mitsubishi Heavy Industries MU-2B-26 and MU-2B-36. Effective Nov 13, 1974 ### Matched by engine (AiResearch TPE331 series) - [AD 2018-22-01](https://openairdocs.org/ad/2018-22-01): Turbine Section · Honeywell International TPE331-10, TPE331-10N, TPE331-10R and 8 more. Effective Dec 10, 2018 - [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 2016-18-17](https://openairdocs.org/ad/2016-18-17): Compressor impeller · Honeywell International TPE331-10, TPE331-10AV, TPE331-10GP and 22 more. Effective Nov 4, 2016 - [AD 2015-18-03](https://openairdocs.org/ad/2015-18-03): Engine propeller shaft coupling failures · Honeywell International TPE331-10, TPE331-10R, TPE331-10U and 8 more. Effective Nov 13, 2015 - [AD 2012-02-06](https://openairdocs.org/ad/2012-02-06): First stage turbine disks · Honeywell International TPE331-10, TPE331-10AV, TPE331-10GP and 12 more. Effective Mar 15, 2012 - [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 2009-17-05](https://openairdocs.org/ad/2009-17-05): First stage turbine disks · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 20 more. Effective Sep 1, 2009 - [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 2004-09-29](https://openairdocs.org/ad/2004-09-29): First Stage Turbine Disks · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 20 more. Effective Jun 15, 2004 - [AD 2002-25-02](https://openairdocs.org/ad/2002-25-02): First stage compressors implellers · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 35 more. Effective Jan 21, 2003 - [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 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 2001-21-02](https://openairdocs.org/ad/2001-21-02): Airplane Flight Manual--Electronic Engine Controls · Honeywell International TPE331-10N, TPE331-12B and TPE331-8. Effective Nov 19, 2001 - [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 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 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 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 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 - [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 86-08-06 R1](https://openairdocs.org/ad/86-08-06-R1): Second Stage Turbine Rotor Assembly · Honeywell International TPE331-25AA, TPE331-25AB, TPE331-25DA and 7 more. Effective Dec 21, 1987 - [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 79-12-04](https://openairdocs.org/ad/79-12-04): Forged Third Stage Turbine Wheel Blade · Honeywell International TPE331-10. Effective May 10, 1979 - [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 74-24-05](https://openairdocs.org/ad/74-24-05): Propeller Pitch Control Sleeve Assembly · Honeywell International TPE331-3U, TPE331-3UW, TPE331-5 and 1 more. Effective Nov 26, 1974 - [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 70-16-09](https://openairdocs.org/ad/70-16-09): High Speed Pinion Assembly · Honeywell International TPE331-3W - [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 2006-17-01](https://openairdocs.org/ad/2006-17-01) (historical): Airplane Flight Manual (AFM) · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Sep 22, 2006 - [AD 2006-15-07](https://openairdocs.org/ad/2006-15-07) (historical): Airplane Flight Manual (AFM) · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Aug 24, 2006 - [AD 2003-22-07](https://openairdocs.org/ad/2003-22-07) (historical): Airplane Flight Manual (AFM) - icing conditions · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Dec 15, 2003 - [AD 2000-09-15](https://openairdocs.org/ad/2000-09-15) (historical): Icing · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Jul 24, 2000 - [AD 2000-02-25](https://openairdocs.org/ad/2000-02-25) (historical): Airframe Pneumatic Deicing Boots · Mitsubishi Heavy Industries MU-2B-10, MU-2B-15, MU-2B-20 and 9 more. Effective Mar 24, 2000 - [AD 97-25-02](https://openairdocs.org/ad/97-25-02) (historical): Airplane Flight Manual (AFM) - Power Levers · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 9 more. Effective Jan 21, 1998 - [AD 97-20-14](https://openairdocs.org/ad/97-20-14) (historical): Airplane Flight Manual (AFM) - Icing Limitations · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 10 more. Effective Oct 17, 1997 - [AD 94-04-16](https://openairdocs.org/ad/94-04-16) (historical): Elevator Nose-Down Trim · Mitsubishi Heavy Industries MU-2B-10, MU-2B-15, MU-2B-20 and 5 more. Effective Apr 11, 1994 - [AD 93-07-11](https://openairdocs.org/ad/93-07-11) (historical): Elevator Nose-Down Trim · Mitsubishi Heavy Industries MU-2B-25, MU-2B-26, MU-2B-26A and 5 more. Effective Jun 1, 1993 - [AD 75-16-20](https://openairdocs.org/ad/75-16-20) (historical): Propeller Pitch Control Lever · Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15 and 6 more. Effective Aug 12, 1975 - [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 88-12-10](https://openairdocs.org/ad/88-12-10) (historical): Turbine Rotor · Honeywell International TPE331-10, TPE331-10R, TPE331-10U and 6 more. Effective Jun 6, 1988 - [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 - [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) (6 in force) - [SAIB CE-19-09](https://openairdocs.org/saib/CE-19-09): Wing Miscellaneous Structure. Issued Jun 10, 2019 - [SAIB CE-12-33](https://openairdocs.org/saib/CE-12-33): Landing Gear Retraction/Extension System, Nose Landing Gear. Issued Jun 12, 2012 - [SAIB NE-16-19](https://openairdocs.org/saib/NE-16-19): Turbine Engine Compressor Section Stator Nozzle Distress. Issued Jul 22, 2016 - [SAIB NE-16-18](https://openairdocs.org/saib/NE-16-18): Power Lever Loss of Power Control. Issued Jul 11, 2016 - [SAIB NE-06-70](https://openairdocs.org/saib/NE-06-70): . Issued Sep 25, 2006 - [SAIB NE-06-69](https://openairdocs.org/saib/NE-06-69): . Issued Sep 20, 2006 ## NTSB investigations None matched to N54PC. ## NTSB investigations on N54PC not matched to an aircraft (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB CHI84LA311](https://openairdocs.org/ntsb/CHI84LA311), Jul 25, 1984: Aerospatiale SA-341G (N54PC), Plymouth, MN, substantial damage ## FAA accident and incident reports None matched to N54PC. ## Reports on N54PC not matched to an aircraft (1) They name N54PC, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft. - [Accident 19840725034669A](https://openairdocs.org/incident/19840725034669A), Jul 25, 1984: Snias SA341G (N54PC), Spring Park, MN, Substantial damage. When pilot initiated climb helicopter went into rapid left rotation until striking ground. No mechanical problem. ## Service difficulty reports None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. ## STCs that may be installed (OpenAirDocs) (20) Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do. ### Approved for the engine (AiResearch TPE331 series) - [STC SE02538AK](https://openairdocs.org/stc/SE02538AK): Modification of Honeywell TPE331-12JR-702TT engine. TAE Aerospace (CTEC). Lists TPE331-12JR - [STC SE03035AT](https://openairdocs.org/stc/SE03035AT): Installation of Royal Atlantic Aviation Engine Oil Filter Bypass Warning System, Kit P/N RAA2003-1-1. Reds Aircraft Service Inc. Lists TPE331-10N - [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. Lists TPE331-1 - [STC SE2924SO](https://openairdocs.org/stc/SE2924SO): Installation of Garrett TPE-331-10 combustor and turbine in the TPE331-8 engine. National Flight Lakeland. Lists TPE331-8 - [STC SE01461NY](https://openairdocs.org/stc/SE01461NY): Propeller pitch control system modification. Hartzell HC-E4N-5D/D9690(B) propeller installed per STC SA01462NY. Not approved on serial numbers TC-398 through TC-418. Hartzell Propeller Inc. Lists TPE331-10UA - [STC SE01604CH](https://openairdocs.org/stc/SE01604CH): Convert Honeywell TPE331-10AV-511B to a TPE331-10AV-511KA. National Flight Services, Inc. Lists TPE331-10AV - [STC SE00229AT](https://openairdocs.org/stc/SE00229AT): Installation of Garrett TPE331-10 Combustor and Turbine in TPE331-6 engine. National Flight Services, Inc. Lists TPE331-6 - [STC SE00275AT](https://openairdocs.org/stc/SE00275AT): Installation of GarrettTPE331-10 combustor and turbine in the TPE331-5 engine. National Flight Services, Inc. Lists TPE331-5 - [STC SE00691CH](https://openairdocs.org/stc/SE00691CH): Modification of a turboprop engine to a turboshaft configuration by incorporation of AlliedSignal (Garrett) TSE331-3U turboshaft gearbox components and other associated changes. National Flight Services, Inc. Lists TPE331-10UA - [STC SE383CH](https://openairdocs.org/stc/SE383CH): Modification of engines. National Flight Services, Inc. Lists TPE331-1 - [STC SE7547SW](https://openairdocs.org/stc/SE7547SW): Install Garrett P/N 865558-16 or865558-1E propeller pitch control cam. Peacock Joe N. Lists TPE331-25A - [STC SE8029SW](https://openairdocs.org/stc/SE8029SW): Modify propeller pitch control, P/N 869130, by installing pitch control cam, Garrett P/N869386-1. Agri Jet Power, Inc. Lists TPE331-1 - [STC SE1725CE](https://openairdocs.org/stc/SE1725CE): Modification to replace torque pressure compensator with a plug for raw torque pressure indicating provision. Air Midwest, Inc. Lists TPE331-3UW - [STC SE33WE](https://openairdocs.org/stc/SE33WE): Modification of: ( 1) Manual fuel valve and beta cams; (2) Fuel control linkage and propeller servo cam; and (3)Automatic control of bleed valve and engine starting functions; S/N P61801 only. Garrett Turbine Engine Company A Division of the Garrett Corporation. Lists TPE331-25D - [STC SE35WE](https://openairdocs.org/stc/SE35WE): Modification of the fuel control, linkage to permit 75% r.p.m. for low ground idle. Garrett Turbine Engine Company Division of Garret Corporation. Lists TPE331-47 - [STC SE39WE](https://openairdocs.org/stc/SE39WE): Modification of the fuel control linkage to permit 75% r.p.m. for ground idle doe S/N 86001. Garrett Turbine Engine Company A Division of the Garrett Corporation. Lists TPE331-57 - [STC SE50WE](https://openairdocs.org/stc/SE50WE): One engine only. Modification of a Model TPE331-25DAL to. incorporate the engine components associated with a torque and temperature 1imitinq system in accordance with AiResearch Kit PIN 896642-1. An en9ine incorporating this kit is reidentified as a Model TPE331-25DALT . Garrett Turbine Engine Company Division of Garret Corporation. Lists TPE331-25DA - [STC SE68WE](https://openairdocs.org/stc/SE68WE): Deletion of fireshield installation kit. West-Figueroa Trust. Lists TPE331-6 - [STC SE56WE](https://openairdocs.org/stc/SE56WE): Serial Numbers P-06012 AND P-06024: Installation of heated compressor inlet temperature sensor lines. AiResearch Manufacturing Company. Lists TPE331-5 - [STC SE38WE](https://openairdocs.org/stc/SE38WE): Modification of fuel control linkage to permit operation of 75% idle speed. S/N 61701 & 61702. Garrett Turbine Engine Company Division of Garret Corporation. Lists TPE331-55 ## Earlier aircraft with N54PC The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N54PC before. - [Cancelled (date not recorded)](https://openairdocs.org/deregistered/N54PC-undated): Aerospatiale SA341G GAZELLE, S/N 1545. N-number assigned, not yet registered ## Related - Other Mitsubishi MU-2B-26 aircraft: https://openairdocs.org/model/mitsubishi-mu-2b-26/aircraft.md - The AiResearch TPE331 series engine: https://openairdocs.org/engine/airesearch-tpe331-series.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.