# N2633: 1940 Lockheed 12A - Status: Valid registration - Airframe: [Lockheed 12A](https://openairdocs.org/model/lockheed-12a) (registry code 5261402, 8 seats) - Engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008) - Data sheets: [TCDS TC 616](https://openairdocs.org/tcds/TC%20616) (Lockheed Aircraft Corporation) (OpenAirDocs) - Serial number: 1281 - Year built: 1940 - Type: Fixed wing multi engine - Engine type: Reciprocating - Airworthiness: Standard - Airworthiness date: November 8, 1968 - Certificate issued: December 17, 2013 - Expires: December 31, 2029 - Mode S code: A28CE3 - Registered owners: [Perras Uwanna P](https://openairdocs.org/faa-owner/PERRAS%20UWANNA%20P), [Perras Yon E](https://openairdocs.org/faa-owner/PERRAS%20YON%20E), [Perras Bros](https://openairdocs.org/faa-owner/PERRAS%20BROS) - Location: [Morrisville, VT](https://openairdocs.org/faa-place/VT/Morrisville) - Owner type: Co-owned - Owner's area on the map: 44.5323° N, 72.6203° W: Placed by OpenAirDocs at the center of ZIP code 05661, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=2633 - Page: https://openairdocs.org/aircraft/N2633 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 Pratt & Whitney R-985 model are included. ## ADs that may apply (OpenAirDocs): 1 in force ### Matched by airframe (Lockheed 12A) - [AD 93-14-12](https://openairdocs.org/ad/93-14-12): Crewmember Protective Breathing Equipment Units · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 201 more. Effective Sep 2, 1993 ### Matched by engine (Pratt & Whitney R-985 series) None in force. ## Information bulletins (advisory) None matched. ## NTSB investigations None matched to N2633. ## FAA accident and incident reports None matched to N2633. ## 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) (19) 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 (Lockheed 12A) - [STC SA02571SE](https://openairdocs.org/stc/SA02571SE): Installation of Garmin G500/G600 TXi Integrated Avionics System (Primary Flight Display, Multi-Function Display, and Engine Indicating System Display). Garmin International Inc - [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC - [STC SA02019SE-D](https://openairdocs.org/stc/SA02019SE-D): Installation of Garmin Model GTN 625/635/650; 725/750 Navigation System. Garmin International 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 SA01757WI](https://openairdocs.org/stc/SA01757WI): To allow the use of UL91 or UL94 (minimum) grade aviation fuel. Swift Fuels LLC - [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 SA11174SC PAGE 1](https://openairdocs.org/stc/SA11174SC%20PAGE%201): Installation of BendixKing by Honeywell KSN 770 and KSN 765 WAAS LPV approach capable nav/comm systems. Honeywell International Inc (Bendix King) - [STC SA01831WI](https://openairdocs.org/stc/SA01831WI): To allow the use of UL91 (minimum) grade aviation fuel. Petersen Aviation Inc - [STC SA02153LA-D PAGE 1](https://openairdocs.org/stc/SA02153LA-D%20PAGE%201): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System. Garmin International Inc - [STC SA01282NY](https://openairdocs.org/stc/SA01282NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K015 on aircraft powered by Pratt & Whitney radial reciprocating engine Series R-985, R-1340 and R-1830. Airwolf Filter Corporation - [STC SA02119SE PAGE 1](https://openairdocs.org/stc/SA02119SE%20PAGE%201): Installation of Garmin GDL 88 ADS-B UAT Transceiver System. Garmin International 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 SA02121SE](https://openairdocs.org/stc/SA02121SE): Installation of Garmin GTS 825 (TAS) or GTS 855 (TCAS I) Traffic System. Garmin International Inc - [STC SA02016SE-D](https://openairdocs.org/stc/SA02016SE-D): Installation of Garmin GTS 800, GTS 820 or GTS 850 Traffic System. Garmin International Inc - [STC SA4172NM](https://openairdocs.org/stc/SA4172NM): Installation of Aviation Development oil filter. Aviation Development Corporation - [STC SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc - [STC SA1860WE](https://openairdocs.org/stc/SA1860WE): ONE ONLY STC, SN 1229: Installation of Goodyear Wheels and Brakes. Harold S. Firth - [STC SA1393WE](https://openairdocs.org/stc/SA1393WE): ONE ONLY STC, SN 1205: Installation of Hamilton Standard 22D30/6531A-15 hyrdromatic propellers in lieu of Hamilton Standard 22D30/6181A-6 Hydromatic propellers. Swift Air Service - [STC SA02153LA-D](https://openairdocs.org/stc/SA02153LA-D) (historical): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System. Garmin International Inc ## Earlier aircraft with N2633 The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N2633 before. - [Cancelled 1946-03-25](https://openairdocs.org/deregistered/N2633-1946-03-25): Beech D18S, S/N 136. Owner: [Beech Aircraft Corp](https://openairdocs.org/faa-owner/BEECH%20AIRCRAFT%20CORP), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita) - [Cancelled 1928-11-15](https://openairdocs.org/deregistered/N2633-1928-11-15): Curtiss JN4D, S/N 80, built 1919. Owner: [Black Earl](https://openairdocs.org/faa-owner/BLACK%20EARL), [San Diego, CA](https://openairdocs.org/faa-place/CA/San%20Diego) ## Related - Other Lockheed 12A aircraft: https://openairdocs.org/model/lockheed-12a/aircraft.md - The Pratt & Whitney R-985 series engine: https://openairdocs.org/engine/pratt-whitney-r-985-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.