# N201MM: 1955 Mooney M-18C 55 - Status: Valid registration - Airframe: [Mooney M-18C 55](https://openairdocs.org/model/mooney-m-18c-55) (registry code 5870104, 1 seats) - Engine: [Continental A&C65 series](https://openairdocs.org/engine/continental-a-c65-series) (registry code 17003) - Data sheets: [TCDS A-803](https://openairdocs.org/tcds/A-803) (Mooney Mite Aircraft Corporation), [TCDS E-205](https://openairdocs.org/tcds/E-205) (Continental Aerospace Technologies, Inc.) (OpenAirDocs) - Serial number: 357 - Year built: 1955 - Type: Fixed wing single engine - Engine type: Reciprocating - Airworthiness: Standard - Airworthiness date: June 19, 1957 - Certificate issued: March 15, 2023 - Expires: March 31, 2030 - Mode S code: A196D9 - Registered owners: [Harms Karen](https://openairdocs.org/faa-owner/HARMS%20KAREN), [Harms Michael](https://openairdocs.org/faa-owner/HARMS%20MICHAEL), [Redsun Oren](https://openairdocs.org/faa-owner/REDSUN%20OREN) - Location: [Napa, CA](https://openairdocs.org/faa-place/CA/Napa) - Owner type: Co-owned - Owner's area on the map: 38.4006° N, 122.1831° W: Placed by OpenAirDocs at the center of ZIP code 94558, within about 11 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=201MM - Page: https://openairdocs.org/aircraft/N201MM 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 Continental A&C65 model are included. ## ADs that may apply (OpenAirDocs): 15 in force ### Matched by airframe (Mooney M-18C 55) - [AD 79-11-05 R1](https://openairdocs.org/ad/79-11-05-R1): Wood Deterioration · Mooney Mite M-18C, M-18C 55, M-18L and 1 more. Effective Apr 1, 1981 - [AD 79-18-07](https://openairdocs.org/ad/79-18-07): Wood Deterioration · Mooney Mite M-18C, M-18C 55, M-18L and 1 more. Effective Sep 3, 1979 - [AD 59-22-03](https://openairdocs.org/ad/59-22-03): Empennage · Mooney Mite M-18C, M-18C 55, M-18L and 1 more - [AD 53-17-01](https://openairdocs.org/ad/53-17-01): Control Stick Boot · Mooney Mite M-18C, M-18C 55, M-18L and 1 more - [AD 51-03-01](https://openairdocs.org/ad/51-03-01): Fuel Line Rework · Mooney Mite M-18C, M-18C 55, M-18L and 1 more ### Matched by engine (Continental A&C65 series) - [AD 98-17-11](https://openairdocs.org/ad/98-17-11): Crankshafts · Continental Motors A-65-3, A-65-8, A75-8 and 90 more. Effective Oct 19, 1998 - [AD 98-01-06](https://openairdocs.org/ad/98-01-06): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 184 more. Effective Feb 13, 1998 - [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 93-19-04](https://openairdocs.org/ad/93-19-04): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 184 more. Effective Oct 18, 1993 - [AD 81-16-05](https://openairdocs.org/ad/81-16-05): Magnetos · Lycoming Engines AEIO-320-E1B, AEIO-320-E2B, AEIO-360-B1G6 and 234 more. Effective Aug 6, 1981 - [AD 81-07-06](https://openairdocs.org/ad/81-07-06): AC Fuel Pumps · Continental Motors A-65-1, A-65-12, A-65-12F and 60 more. Effective Apr 1, 1981 - [AD 80-06-05](https://openairdocs.org/ad/80-06-05): Magnetos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 254 more. Effective Mar 28, 1980 - [AD 69-24-03](https://openairdocs.org/ad/69-24-03): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 321 more. Effective Nov 29, 1969 - [AD 69-09-01](https://openairdocs.org/ad/69-09-01): Eisemann Magnetos · Eisemann Magnetos, 2A4-45-B2, 2A4-49-B2 and 158 more - [AD 46-36-01](https://openairdocs.org/ad/46-36-01): Piston Pins · Continental Motors A-65-1, A-65-12, A-65-12F and 32 more ### Historical (superseded or no longer in force) - [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 ## Information bulletins (advisory) (3 in force) - [SAIB NE-16-13](https://openairdocs.org/saib/NE-16-13): Powerplant - Prohibited use of sealant. Issued Mar 8, 2016 - [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 CE-98-21R1](https://openairdocs.org/saib/CE-98-21R1): . Issued Jun 10, 1998 ## NTSB investigations (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 WPR23LA202](https://openairdocs.org/ntsb/WPR23LA202), May 26, 2023: Mooney M-18C 55 (N201MM), Napa, CA, substantial damage. Probable cause: The pilot’s failure to use carburetor heat, which resulted in a loss of engine power due to carburetor icing and a subsequent impact with terrain during a forced landing. ## FAA accident and incident reports (1) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Accident 20230526008299A](https://openairdocs.org/incident/20230526008299A), May 26, 2023: Mooney M-18C 55 (N201MM), Napa, CA, Substantial damage. On 05/25/2023 at approximately 1845 PST a 1955 Mooney M-18C-551 was involved in an accident that resulted in an off airport landing with substantial damage.… ## 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 M-18C 55) - [STC SA01861SE](https://openairdocs.org/stc/SA01861SE): Fabrication and installation of Landing Light Controller. TCW Technologies, LLC - [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC - [STC SA00079NY](https://openairdocs.org/stc/SA00079NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K008 on single and multi engine fixed wing light aircraft incorporating Teledyne Continental reciprocating engines of 450 horsepower or less. Airwolf Filter Corporation - [STC SA02738CH](https://openairdocs.org/stc/SA02738CH): Installation of L-3 Communications Avionics Systems. Acron Aviation Inc - [STC SA04046CH PAGE 1](https://openairdocs.org/stc/SA04046CH%20PAGE%201): Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500). Acron Aviation Inc - [STC SA7965SW](https://openairdocs.org/stc/SA7965SW): Application of fabric and polyurethane finishing system. Shady Aviation LLC - [STC SA01757WI](https://openairdocs.org/stc/SA01757WI): To allow the use of UL91 or UL94 (minimum) grade aviation fuel. Swift Fuels LLC - [STC SA01967WI](https://openairdocs.org/stc/SA01967WI): Use of GAMI G100UL High Octane Unleaded Avgas. General Aviation Modifications Inc - [STC SA04776NY](https://openairdocs.org/stc/SA04776NY): The HIPEC Covering and Finishing System must be performed and maintained. HIPEC Aircraft Coatings Inc - [STC SA02444AK](https://openairdocs.org/stc/SA02444AK): Approval of the L-3 Communications NGT 9000/9000R ADS-B system installed. ADS-B Technologies LLC - [STC SA01831WI](https://openairdocs.org/stc/SA01831WI): To allow the use of UL91 (minimum) grade aviation fuel. Petersen Aviation Inc - [STC SA04362CH](https://openairdocs.org/stc/SA04362CH): Installation of the uAvionix skyBeacon Automatic Dependent Surveillance-Broadcast (ADS-B) Out. uAvionix Corporation - [STC SA04165NY](https://openairdocs.org/stc/SA04165NY): Installation of Latitude Technologies Skynode S200 Satcom system must be performed. Latitude Technologies Corporation - [STC SA01734SE](https://openairdocs.org/stc/SA01734SE): Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts. Andrew D. Humphrey - [STC SA00478CH](https://openairdocs.org/stc/SA00478CH): Installation of Cooper Superflite 102 Fabric. Aviation Products Systems Inc - [STC SA02442AK PAGE 1](https://openairdocs.org/stc/SA02442AK%20PAGE%201): Approval of the L-3 Communications NGT 2000/2500 ADS-B system. ADS-B Technologies, LLC - [STC SA02283SE PAGE 1](https://openairdocs.org/stc/SA02283SE%20PAGE%201): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P. Electronics International Inc - [STC SA02402SE PAGE 2](https://openairdocs.org/stc/SA02402SE%20PAGE%202): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) CGR-30C. Electronics International Inc - [STC SA01026SE](https://openairdocs.org/stc/SA01026SE): Improved fuel gascolator assembly. Steve's Aircraft - [STC SA02825NY PAGE 1](https://openairdocs.org/stc/SA02825NY%20PAGE%201): Installation of Aerospace Logic Aircraft Instruments. Aerospace Logic Inc - [STC SA03148NY](https://openairdocs.org/stc/SA03148NY): The installation of the Latitude Technologies Corporation S100 Tracking System. Latitude Technologies Corporation - [STC SA1315WE](https://openairdocs.org/stc/SA1315WE): Installation of Mixture Monitor (exhaust gas temperature probe, gage and selector) in accordance with Delta Products Part Lists A-192 and A-193, or in accordance with Tri-Star Corporation Mixture Monitor Installation Instructions dated December 9, 1981, or later FAA approved revision and/or Drawing List MM-127 dated November 15, 1981, or later FAA approved revision in aircraft models listed in Master Eligibility List P-80-A-6 revised March 29, 1968, copy attached, or later FAA approved revision. Universal Corporation - [STC SA00068SE](https://openairdocs.org/stc/SA00068SE): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1). Electronics International Inc - [STC SA02033AT](https://openairdocs.org/stc/SA02033AT): Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line. M-20 Oil Separators LLC - [STC SA01157LA](https://openairdocs.org/stc/SA01157LA): Installation of Electronics International Model FP-5 or FP-5L fuel flow/fuel pressure instrument as a replacement instrument. Electronics International Inc - [STC SA00071SE](https://openairdocs.org/stc/SA00071SE): Cockpit sun visor installation. Rosen Sunvisor Systems LLC - [STC SA01944CH](https://openairdocs.org/stc/SA01944CH): Modify airplane to fly on unleaded automotive gasoline, 87 minimum antiknock index, per ASTM Specification D-439 or D-4818 of any volatility class, A through E, or 82UL AVGAS per ASTM D-6227. Experimental Aircraft Association Inc - [STC SA866GL](https://openairdocs.org/stc/SA866GL): Superseded by STC SA01944CH. Modify airplane to fly on unleaded automotive gasoline, 87 mimimum antiknock index. EAA Aviation Foundation - [STC SA8075SW](https://openairdocs.org/stc/SA8075SW): Installation of fiberglass covering. (M-62 SERIES PT-19) (G-73 SCHWEIZER). Razorback Fabrics Inc - [STC SA1008WE](https://openairdocs.org/stc/SA1008WE): Installation of Poly-Fiber covering material. Poly-Fiber Inc. Lists M-18 Series - [STC SA489EA](https://openairdocs.org/stc/SA489EA): Installation of ARP Inc. carburetor ice detection system. Aircraft & Rotorcraft Products (ARP) Inc - [STC SA09470SC](https://openairdocs.org/stc/SA09470SC): Installation of Starter Indicator light system. Texas Skyways Inc - [STC SA5159NM](https://openairdocs.org/stc/SA5159NM): Installation of chip detector system. Northwest Aircraft Inc. Lists M-18 Series - [STC SA4-302](https://openairdocs.org/stc/SA4-302): Installation of BN-1 propeller spinner. ACS Products Co, Inc. Lists M-18 Series - [STC SA1351WE](https://openairdocs.org/stc/SA1351WE): Replace existing fabric on wings, fuselage, empennage, and/or control surfaces, with Ceconite101 material. (262A Series -12). Ceconite Inc - [STC SA4-1210](https://openairdocs.org/stc/SA4-1210): Installation of Eonnex cover on aircraft surfaces. Ceconite, Inc - [STC SA308EA](https://openairdocs.org/stc/SA308EA): Installation of carburetor ice detection system 105AP in single and twin engine aircraft and single engine helicopters powered by Continental, Franklin, and Lycoming type engines equipped with Marvel-Schebler MA-2, MA-3, MA-4, MA-4-5, MA-6 and HA-6 series carburetors. (Normal,Utility and Acrobatic Category airplanes and helicopters equipped with engines and carburetors as described.). Alfred R Puccinelli - [STC SA798EA](https://openairdocs.org/stc/SA798EA): Installation of Monitair exhaust gas combustion monitor kit. Rosemount Engineering Co. Lists M-18 Series - [STC SA1350WE](https://openairdocs.org/stc/SA1350WE): Replace existing fabric on wings, fuselage, empennage and/or control surfaces with fiberglass cloth. Ceconite, Inc - [STC SA1-615](https://openairdocs.org/stc/SA1-615): Installation of Fram lube oil filter Model PB55-1. Fram Aerospace. Lists M-18 Series - [STC SA1044WE](https://openairdocs.org/stc/SA1044WE): Continental A75-8 65 hp engine and McCauley 1B90-CM/6753 propeller. Aero Spec. Lists M-18 Series - [STC SA2-1053](https://openairdocs.org/stc/SA2-1053): Wing, fin and stabilizer structure reinforcements accomplished in accordance with Poplawski Drawing No. 23. A.H. Frank Poplawski - [STC SA1177WE](https://openairdocs.org/stc/SA1177WE): WECO carburetor temperature monitor. Winnen Richard P. Lists M-18 Series - [STC SA4-1106](https://openairdocs.org/stc/SA4-1106): Ceconite 101 covering of wings, ailerons, rudder, elevators, horizontal and vertical stabilizers. Cooper Engineering Corporation. Lists M-18 Series - [STC SA4-840](https://openairdocs.org/stc/SA4-840): Fabric replaced with glass cloth on wings, fuselage, empennage and/or control surfaces. Air Fibre Inc. Lists M-18 Series - [STC SA1-353](https://openairdocs.org/stc/SA1-353): Delco Remy generator 1101899 and associated plastic cowling. George W Strattner - [STC SA3-483](https://openairdocs.org/stc/SA3-483) (historical): Installation of Continental C85-12 engine. Sparks Donna R ### Approved for the engine (Continental A&C65 series) - [STC SE04651CH](https://openairdocs.org/stc/SE04651CH): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22. Swift Fuels LLC. Lists A-65-1 - [STC SE2932SW](https://openairdocs.org/stc/SE2932SW): Install carburetor air temperature indicator. Approved for Aircooled Motors (Franklin Engine Co.) equipped with float carburetors. Model eligibility included here may not be inclusive. Alcor LLC. Lists A-65-1 - [STC SE208SO](https://openairdocs.org/stc/SE208SO): Installation of ice indicator in the carburetor. LegacySTC.com All 76: https://openairdocs.org/aircraft/N201MM/stcs.md ## Earlier aircraft with N201MM The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N201MM before. - [Cancelled 1993-11-08](https://openairdocs.org/deregistered/N201MM-1993-11-08): Mooney M20J, S/N 240002. Triennial form not returned. Owner: [Mooney Aircraft Corporation](https://openairdocs.org/faa-owner/MOONEY%20AIRCRAFT%20CORPORATION), [Kerrville, TX](https://openairdocs.org/faa-place/TX/Kerrville) ## Related - Other Mooney M-18C 55 aircraft: https://openairdocs.org/model/mooney-m-18c-55/aircraft.md - The Continental A&C65 series engine: https://openairdocs.org/engine/continental-a-c65-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.