# N121PA: 2019 Mooney International M20U

- Status: Valid registration
- Airframe: [Mooney International M20U](https://openairdocs.org/model/mooney-international-m20u) (registry code 5870232, 4 seats)
- Engine: [Continental IO-550 series](https://openairdocs.org/engine/continental-io-550-series) (registry code 17042)
- Data sheets: [TCDS 2A3](https://openairdocs.org/tcds/2A3) (Mooney International Corporation), [TCDS E3SO](https://openairdocs.org/tcds/E3SO) (Continental Aerospace Technologies, Inc.) (OpenAirDocs)
- Serial number: 32-0010
- Year built: 2019
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: June 4, 2019
- Certificate issued: October 7, 2019
- Expires: October 31, 2029
- Mode S code: A058AF
- Registered owner: [N121pa LLC](https://openairdocs.org/faa-owner/N121PA%20LLC)
- Location: [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell)
- Owner type: LLC
- Owner's area on the map: 48.2306° N, 114.4033° W: Placed by OpenAirDocs at the center of ZIP code 59901, within about 12 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=121PA
- Page: https://openairdocs.org/aircraft/N121PA

From the FAA registry file of October 24, 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 Continental IO-550 model are included.

## ADs that may apply (OpenAirDocs): 29 in force

### Matched by airframe (Mooney International M20U)

None in force.

### Matched by engine (Continental IO-550 series)

- [AD 2023-17-04](https://openairdocs.org/ad/2023-17-04): Reciprocating Engine Oil System · F & M Enterprises' Model C6LC, C6LC-S or C6LC-L oil filter… (Stratus Tool Technologies STC SE09356SC or 2 others). Effective Oct 26, 2023
- [AD 2023-09-09](https://openairdocs.org/ad/2023-09-09): Exhaust Turbine System (Recip) · Aerostar PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P) and 292 more. Effective Jul 17, 2023
- [AD 2023-05-16](https://openairdocs.org/ad/2023-05-16): Reciprocating Engine Power Section · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 147 more. Effective Mar 15, 2023
- [AD 2023-02-12](https://openairdocs.org/ad/2023-02-12): Engine Air Intake System · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 127 more. Effective Feb 17, 2023
- [AD 2022-16-03](https://openairdocs.org/ad/2022-16-03): Engine (RECIPROCATING) · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-F and 236 more. Effective Aug 15, 2022
- [AD 2020-16-11](https://openairdocs.org/ad/2020-16-11): SUMMARY: Reciprocating Cylinder Section · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 23 more. Effective Sep 21, 2020
- [AD 2016-16-12](https://openairdocs.org/ad/2016-16-12): Cylinder assemblies · Continental Motors LTSIO-520-AE, TSIO-520-A, TSIO-520-AE and 89 more. Effective Sep 15, 2016
- [AD 2014-05-29](https://openairdocs.org/ad/2014-05-29): SAP replacement parts manufacturer approval (PMA) investment cast cylinder assemblies · Continental Motors TSIO-520-A, TSIO-520-AE, TSIO-520-AF and 55 more. Effective Apr 25, 2014
- [AD 2012-10-13](https://openairdocs.org/ad/2012-10-13): Starter adapters · Continental Motors IO-550-N, TSIO-520-B, TSIO-520-BB and 14 more. Effective Jun 8, 2012
- [AD 2012-03-06](https://openairdocs.org/ad/2012-03-06): Fuel servo diaphragm · Continental Motors 6-260-A, 6-285-A, 6-285-B and 482 more. Effective Feb 24, 2012
- [AD 2010-11-04](https://openairdocs.org/ad/2010-11-04): Hydraulic lifters · Continental Motors FSO-470-A, GIO-470-A, GTSIO-520-C and 190 more. Effective Jun 16, 2010
- [AD 2009-19-07](https://openairdocs.org/ad/2009-19-07): EQ3 cylinders · Continental Motors IO-470-C, IO-470-D, IO-470-E and 72 more. Effective Oct 7, 2009
- [AD 2007-16-10](https://openairdocs.org/ad/2007-16-10): Kelly Aerospace Power Systems turbochargers · Turbonormalizing system (Engine Technologies STC SE10589SC or SA10588SC). Effective Aug 23, 2007
- [AD 2007-04-19 R1](https://openairdocs.org/ad/2007-04-19-R1): SAP cylinder assemblies · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 314 more. Effective May 7, 2007
- [AD 2004-08-10](https://openairdocs.org/ad/2004-08-10): Serial-numbered (SN) cylinders · Modify Teledyne Continental TSIO-520-NB engine (RAM Aircraft Limited Partnership STC SE09104SC or 4 others). Effective May 5, 2004
- [AD 2000-23-21](https://openairdocs.org/ad/2000-23-21): Crankshaft · Continental Motors IO-360-A, IO-360-AB, IO-360-B and 164 more. Effective Dec 12, 2000
- [AD 99-19-01](https://openairdocs.org/ad/99-19-01): No. 2 and No. 5 Crankshaft Inspections · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 127 more. Effective Sep 30, 1999
- [AD 96-12-22](https://openairdocs.org/ad/96-12-22): Full Flow Engine Oil Adapter · Bellanca CH-300 Pacemaker, 120, 140 and 361 more. Effective Jul 31, 1996
- [AD 95-21-15](https://openairdocs.org/ad/95-21-15): Aviation Gasoline · Continental Motors A-65-8, C85-12F, C85-12FJ and 77 more. Effective Nov 28, 1995
- [AD 95-03-14](https://openairdocs.org/ad/95-03-14): Engine Mount Brackets · Continental Motors IO-346-A, IO-346-B, IO-520-C and 2 more. Effective Mar 13, 1995
- [AD 93-16-15](https://openairdocs.org/ad/93-16-15): Fuel Pump Drive Shaft · Continental Motors IO-520-B, IO-520-BA, IO-520-BB and 27 more. Effective Dec 14, 1993
- [AD 93-08-17](https://openairdocs.org/ad/93-08-17): Oil Pick-Up Tube · Continental Motors IO-470-A, IO-470-C, IO-470-D and 104 more. Effective Aug 23, 1993
- [AD 93-10-02](https://openairdocs.org/ad/93-10-02): Missing Cylinder Valve Retainer Key · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 180 more. Effective Aug 12, 1993
- [AD 91-19-03](https://openairdocs.org/ad/91-19-03): Oil Filter · Continental Motors 6-285-A, 6-285-B, 6-285-BA and 169 more. Effective Sep 29, 1991
- [AD 88-17-03](https://openairdocs.org/ad/88-17-03): Starter Adapter Shaftgear Assembly · Continental Motors IO-520-BA, IO-520-BB, IO-550-B and 4 more. Effective Aug 10, 1988
- [AD 88-03-06](https://openairdocs.org/ad/88-03-06): Oil Filter · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-E and 155 more. Effective Apr 15, 1988
- [AD 86-13-04 R3](https://openairdocs.org/ad/86-13-04-R3): Cylinder Assemblies · Continental Motors GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 44 more. Effective Feb 24, 1988
- [AD 87-14-02](https://openairdocs.org/ad/87-14-02): Starter Adapter Shaftgear · Continental Motors IO-520-BA, IO-520-BB, IO-550-B and 4 more. Effective Oct 5, 1987
- [AD 98-01-08](https://openairdocs.org/ad/98-01-08): Exhaust Roller Rocker Arm · Roller rocker arm P/N PE 92I intake and PE92E exhaust (Performance Engineering STC SE8594SW)

### Historical (superseded or no longer in force)

- [AD 2023-04-08](https://openairdocs.org/ad/2023-04-08) (historical): Reciprocating Engine Power Section · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 141 more. Effective Feb 23, 2023
- [AD 2022-04-04](https://openairdocs.org/ad/2022-04-04) (historical): Reciprocating Engine Oil System · F & M Enterprises' Model C6LC, C6LC-S or C6LC-L oil filter… (Stratus Tool Technologies STC SE09356SC or 2 others). Effective Mar 29, 2022
- [AD 2011-25-51](https://openairdocs.org/ad/2011-25-51) (historical): Starter Adapter Gear Shaft · Continental Motors IO-550-N, TSIO-520-B, TSIO-520-BB and 14 more. Effective Dec 28, 2011
- [AD 2009-24-52](https://openairdocs.org/ad/2009-24-52) (historical): Hydraulic lifters · Continental Motors FSO-470-A, GIO-470-A, GTSIO-520-C and 192 more
- [AD 2009-16-03](https://openairdocs.org/ad/2009-16-03) (historical): Cylinder assemblies · Continental Motors IO-520-A, IO-520-B, IO-520-BA and 55 more. Effective Sep 9, 2009
- [AD 2000-08-51](https://openairdocs.org/ad/2000-08-51) (historical): Crankshaft · Teledyne Continental Motors IO-360-A, IO-360-AB, IO-360-B and 158 more
- [AD 94-09-07](https://openairdocs.org/ad/94-09-07) (historical): Engine Mount Brackets · Teledyne Continental Motors IO-346-A, IO-346-B, IO-520-C and 2 more. Effective Jul 5, 1994
- [AD 94-14-12](https://openairdocs.org/ad/94-14-12) (historical): Octane Aviation Gasoline · Teledyne Continental Motors A-65-8, C85-12, E185-11 and 68 more
- [AD 99-09-17](https://openairdocs.org/ad/99-09-17) (historical): Crankshaft · Teledyne Continental Motors IO-470-A, IO-470-C, IO-470-D and 114 more

## Information bulletins (advisory) (12 in force)

- [SAIB 2023-02](https://openairdocs.org/saib/2023-02): Landing Gear System. Issued Mar 3, 2023
- [SAIB NE-20-05](https://openairdocs.org/saib/NE-20-05): POWERPLANT - Engine Camshaft Gear Tooth Fracture. Issued Apr 6, 2020
- [SAIB NE-18-16](https://openairdocs.org/saib/NE-18-16): POWERPLANT  Alternator Drive Coupling. Issued Jun 20, 2018
- [SAIB NE-17-11](https://openairdocs.org/saib/NE-17-11): POWERPLANT  Engine damage as a result of kickback. Issued May 10, 2017
- [SAIB NE-16-13](https://openairdocs.org/saib/NE-16-13): Powerplant - Prohibited use of sealant. Issued Mar 8, 2016
- [SAIB NE-13-15](https://openairdocs.org/saib/NE-13-15): Engine Controls: Continental Motors, Inc. (CMI) Throttle and Mixture Control Levers. Issued Feb 8, 2013
- [SAIB NE-13-04](https://openairdocs.org/saib/NE-13-04): Continental Motors, Inc. (CMI) Connecting Rod Piston Pin Bushing Inspection. Issued Oct 31, 2012
- [SAIB NE-10-09](https://openairdocs.org/saib/NE-10-09): Reciprocating Engine Power Section: Hydraulic Valve Lifters. Issued Nov 20, 2009
- [SAIB NE-10-07](https://openairdocs.org/saib/NE-10-07): Reciprocating Engine Cylinder: Identification Information for Superior Air Parts, PMA Cylinder Heads for Teledyne Continental Motors (TCM) IO-520, TSIO-520,and IO-550 Series Engines.. Issued Nov 2, 2009
- [SAIB NE-09-08](https://openairdocs.org/saib/NE-09-08): Reciprocating Engine Cylinder Section. Issued Jan 30, 2009
- [SAIB NE-07-09R1](https://openairdocs.org/saib/NE-07-09R1): Periodic Inspections of ECi Cylinder Assemblies for Cracks in the Aluminum Head. Issued Mar 21, 2007
- [SAIB NE-02-41](https://openairdocs.org/saib/NE-02-41): . Issued Aug 8, 2002

## NTSB investigations

None matched to N121PA.

## FAA accident and incident reports

None matched to N121PA.

## 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) (76, first 50)

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 airframe (Mooney International M20U)

- [STC SA01134DE](https://openairdocs.org/stc/SA01134DE): Installation of EarthX ETX680-24-TSO Lithium Battery. EarthX Inc
- [STC SA01005DE](https://openairdocs.org/stc/SA01005DE): Installation of a EarthX ETX900-TSO Lithium battery. EarthX Inc
- [STC SA5581SW](https://openairdocs.org/stc/SA5581SW): Installation of ALCOR true-flow/ totalizer system. Alcor LLC. Lists M20 Series
- [STC SA04378CH](https://openairdocs.org/stc/SA04378CH): Installation of an engine modified per STC SE04349CH. SureFly Partners Ltd
- [STC SA04568CH](https://openairdocs.org/stc/SA04568CH): Installation of the uAvionix tailBeaconX, a tail mounted position light with integrated Automatic Dependent Surveillance - Broadcast (ADS-B) Out and 1090MHz Mode-S transponder functionality. uAvionix Corporation
- [STC SA04400NY](https://openairdocs.org/stc/SA04400NY): Installation of the Integrated Back-up Battery System (IBBS). TCW Technologies LLC
- [STC SA04586CH](https://openairdocs.org/stc/SA04586CH): Installation of Electroair Back Up Battery Panel System Control. Electroair Aquisition Corp
- [STC SA01967WI](https://openairdocs.org/stc/SA01967WI): Use of GAMI G100UL High Octane Unleaded Avgas. General Aviation Modifications Inc
- [STC SA00401BO](https://openairdocs.org/stc/SA00401BO): Installation of a SkyTrax100B UAT receiver. Avidyne Corporation
- [STC SA00410BO](https://openairdocs.org/stc/SA00410BO): Installation of an AV-30-C Multi-Mode Indicator. uAvionix Corporation
- [STC SA04428CH](https://openairdocs.org/stc/SA04428CH): Installation of electric air conditioning system in accordance with Master Drawing List (MDL) as listed on AML No. SA04428CH, or later FAA approved revision. Kelly Aerospace Thermal Systems LLC
- [STC SA04112CH](https://openairdocs.org/stc/SA04112CH): Installation of Appareo Systems, LLC Stratus ESG ADS-B transponder. Appareo Systems LLC
- [STC SA02503AK](https://openairdocs.org/stc/SA02503AK): Installation of AMSAFE State of the Art Restraint System (SOARS) inflatable restraints. AMSAFE Inc
- [STC SA02573SE](https://openairdocs.org/stc/SA02573SE): Installation of a Garmin GDL 82 UAT Datalink Transceiver. Garmin International Inc
- [STC SA01439SE](https://openairdocs.org/stc/SA01439SE): Installation of vortex generators on the wings and tail surfaces of the above model aircraft. Micro AeroDynamics Inc
- [STC SA02193CH](https://openairdocs.org/stc/SA02193CH): Power increase to 310 BHP by Installation of Powerlite STC SE02930AT or CMI IO-550N Engine rated at 310 BHP/2700 RPMs and Hartzell Propeller Model PHC-J3YF-1RF/F7693DF(B)-2 propeller. Mooney International Corp
- [STC SA1787WE](https://openairdocs.org/stc/SA1787WE): Installation of Brittain NAV-2B flight control system. Brittain Industries, Inc. Lists M20 Series
- [STC ST02547AT](https://openairdocs.org/stc/ST02547AT): Installation of a voice alert system. Aircraft Components Inc. Lists M20 Series
- [STC SA2986WE](https://openairdocs.org/stc/SA2986WE): Installation of Pathfinder autopilot systems. (M20 SERIES see MDL No. 77-030-1 for approved models). Astronautics Corporation of America. Lists M20 Series
- [STC SA3145SO](https://openairdocs.org/stc/SA3145SO): Provides an approved procedure for applying Aero-Trim Aeroseal, P/N 500 externally to wing skin seams of fuel tanks to stop seepage from micro leaks up to .005 inches wide. Aero Trim, Inc. Lists M20 Series
- [STC SA1570WE](https://openairdocs.org/stc/SA1570WE): Installation of Brittain NAV-2 flight control system. Brittain Industries Inc. Lists M20 Series
- [STC SA1584WE](https://openairdocs.org/stc/SA1584WE): Installation of Brittain Model B-6 flight control system. Brittain Industries Inc. Lists M20 Series
- [STC SA1780WE](https://openairdocs.org/stc/SA1780WE): Installation of Brittain Industries LSA-5 flight control system. Brittain Industries Inc. Lists M20 Series
- [STC SA1785WE](https://openairdocs.org/stc/SA1785WE): Installation of Brittain Industries B2C flight control system. Brittain Industries Inc. Lists M20 Series
- [STC SA1786WE](https://openairdocs.org/stc/SA1786WE): Installation of Brittain Industries B-6 flight control system. Brittain Industries Inc. Lists M20 Series
- [STC SA1-615](https://openairdocs.org/stc/SA1-615): Installation of Fram lube oil filter Model PB55-1. Fram Aerospace. Lists M20 Series
- [STC SA1177WE](https://openairdocs.org/stc/SA1177WE): WECO carburetor temperature monitor. Winnen Richard P. Lists M20 Series
- [STC SA1550WE](https://openairdocs.org/stc/SA1550WE): Installation of Brittain LSA-4 flight control system. Brittain Industries Inc. Lists M20 Series
- [STC SA241SO](https://openairdocs.org/stc/SA241SO): Mooney dorsal fin 4175-51. Atlanta Aero Service Inc. Lists M20 Series
- [STC SA4-1542](https://openairdocs.org/stc/SA4-1542): Ceconite 101 covering of rudder, elevators, ailerons, and flaps. Cooper Engineering Corporation. Lists M20 Series
- [STC SA4-768](https://openairdocs.org/stc/SA4-768): Fuel flow filter 30409A with element 1A0235 and adapter 2A0083. Winslow Aerofilter Corp. Lists M20 Series
- [STC SA4-925](https://openairdocs.org/stc/SA4-925): Magnetic flight director 2000. Clarkson Company. Lists M20 Series
- [STC SA42SO](https://openairdocs.org/stc/SA42SO): A-100 burglar alarm system. Kapu Alarms Inc. Lists M20 Series
- [STC SA848WE](https://openairdocs.org/stc/SA848WE): Air-Guard anti-collision light. Tibbetts Aircraft Radio. Lists M20 Series
- [STC SA001410BO](https://openairdocs.org/stc/SA001410BO) (historical): Installation of an AV-30-C Multi-Mode Indicator. uAvionix Corporation

### Approved for the engine (Continental IO-550 series)

- [STC SE04349CH](https://openairdocs.org/stc/SE04349CH): Installation of SureFly electronic ignition. SureFly Partners Ltd. Lists IO-550-A
- [STC SE02352CH](https://openairdocs.org/stc/SE02352CH): Installation of Challenger cleanable oil filter assembly. Challenger Aviation Products Inc. Lists IO-550-A
- [STC SE03309CH](https://openairdocs.org/stc/SE03309CH): Installation of Engine Preheat Kit, p/n TSP6CYL-2927-115 for 115 volt application. Hartzell Propeller Inc. Lists IO-550-A
- [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp. Lists IO-550-A
- [STC SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc. Lists IO-550-A
- [STC SE02525AT](https://openairdocs.org/stc/SE02525AT): Modification to install new engine mount brackets. Summit Aviation Inc. Lists IO-550-N
- [STC SE09356SC](https://openairdocs.org/stc/SE09356SC): Install F & M Enterprises' Model C6LC, C6LC-S or C6LC-L oil filter adapter for a spin-on oil filter. Stratus Tool Technologies LLC. Lists IO-550-A
- [STC SE03705AT](https://openairdocs.org/stc/SE03705AT): Convert Continental Motors IO-550-D,-E,-F and -L engine to Vitatoe Aviation, LLC IO-550-D-CF,-E-CF,-F-CF or -L-CF engine in accordance with Master Parts List PL2007-07 Rev. D dated 05 Oct. 2018 or later FAA approved revision and Assembly Instructions PL2007-12 Rev. C dated 05 Oct. 2018 or later FAA approved revision. Vitatoe Aviation LLC. Lists IO-550-C
- [STC SE09217SC](https://openairdocs.org/stc/SE09217SC): Installation of modified fuel injector nozzles. General Aviation Modifications Inc. Lists IO-550-A
- [STC SE0417CH](https://openairdocs.org/stc/SE0417CH): Turbo-normalization. Western Skyways Aircraft Modifications Inc. Lists IO-550-F
- [STC SE03415CH](https://openairdocs.org/stc/SE03415CH): The turbo-normalization of Continental Motors engine models IO-520-A, -F, -J, and -L, TSIO-520-C, -G, -H, -M, and -R, and IO-550-F and L for installation into Cessna 206, 207 & 210 aircraft. DERS Group Svc LLC. Lists IO-550-F
- [STC SE09896AC](https://openairdocs.org/stc/SE09896AC): Installation of Taper Fin Cylinders. General Aviation Modifications Inc. Lists IO-550-B
- [STC SE09637SC](https://openairdocs.org/stc/SE09637SC): Remove existing rocker arm assemblies and install modify rocker arm assemblies. General Aviation Modifications Inc. Lists IO-550-A
- [STC SE8677SW](https://openairdocs.org/stc/SE8677SW): Installation of Garrett/Airesearch Model TE0659 turbocharger. Western Skyways, Inc. Lists IO-550-B
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc

All 76: https://openairdocs.org/aircraft/N121PA/stcs.md

## Earlier aircraft with N121PA

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N121PA before.

- [Cancelled 2009-12-22](https://openairdocs.org/deregistered/N121PA-2009-12-22): Aero Commander 1121A, S/N 129, built 1969. Triennial form not returned. Owner: [Dodson International Parts Inc](https://openairdocs.org/faa-owner/DODSON%20INTERNATIONAL%20PARTS%20INC), [Rantoul, KS](https://openairdocs.org/faa-place/KS/Rantoul)

## Related

- Other Mooney International M20U aircraft: https://openairdocs.org/model/mooney-international-m20u/aircraft.md
- The Continental IO-550 series engine: https://openairdocs.org/engine/continental-io-550-series.md

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