# N9991U: Grumman American Avn. AA-5A, registration cancelled 1992-04-21

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 21, 1992
- Status when cancelled: Triennial form not returned
- Airframe: [Grumman American Avn. AA-5A](https://openairdocs.org/model/grumman-american-avn-aa-5a) (registry code 3960106)
- Data sheets: [TCDS A16EA](https://openairdocs.org/tcds/A16EA) (OpenAirDocs)
- Serial number: AA5A0391
- Type of aircraft: Fixed wing single engine
- Certificate issued: June 21, 1977
- Last registry action: January 21, 1992
- Mode S code: ADF6A0
- Owners when cancelled: [Schrotenboer Fred J DBA](https://openairdocs.org/faa-owner/SCHROTENBOER%20FRED%20J%20DBA), [San Luis Valley Aviation](https://openairdocs.org/faa-owner/SAN%20LUIS%20VALLEY%20AVIATION)
- Location: [Monte Vista, CO](https://openairdocs.org/faa-place/CO/Monte%20Vista)
- Owner type: Individual
- Owner's area on the map: 37.5535° N, 106.1395° W: Placed by OpenAirDocs at the center of ZIP code 81144, within about 10 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N9991U
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=9991U
- Page: https://openairdocs.org/deregistered/N9991U-1992-04-21

From the FAA registry file of November 7, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Grumman American Avn. AA-5A: https://openairdocs.org/model/grumman-american-avn-aa-5a.md

## 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 DEN92FA020](https://openairdocs.org/ntsb/DEN92FA020), Dec 25, 1991: Grumman American AA-5A (N9991U), Monte Vista, CO, destroyed, 3 fatal. Probable cause: AN INADVERTENT STALL BY THE PILOT IN COMMAND AT AN ALTITUDE INSUFFICIENT TO EFFECT RECOVERY. FACTORS WERE: AIRCRAFT GROSS WEIGHT ABOVE MAXIMUM; PHYSICAL IMPAIRMENT OF THE PILOT; LACK OF TOTAL…

## 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 19911225057239A](https://openairdocs.org/incident/19911225057239A), Dec 25, 1991: Gulstm AA5A (N9991U), Monte Vista, CO, Destroyed, 3 fatal. Indicates stall on climbout. Over gross weight. Pilot high level carbon monoxide. Possibly from work as auto mechanic

## Other aircraft with N9991U

- [Registered now](https://openairdocs.org/aircraft/N9991U): DJI AGRAS T40, S/N 64TBKAF002007T

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