# N6DF: 1945 Grumman G-21A

- Status: Valid registration
- Airframe: [Grumman G-21A](https://openairdocs.org/model/grumman-g-21a) (registry code 3951204, 8 seats)
- Engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008)
- Data sheets: [TCDS TC 654](https://openairdocs.org/tcds/TC%20654) (Frakes Aviation) (OpenAirDocs)
- Serial number: B-128
- Year built: 1945
- Type: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: October 28, 1977
- Certificate issued: July 25, 1991
- Expires: December 31, 2027
- Mode S code: A7C2DE
- Registered owner: [Mabee Roy W](https://openairdocs.org/faa-owner/MABEE%20ROY%20W)
- Location: [Meridian, ID](https://openairdocs.org/faa-place/ID/Meridian)
- Owner type: Individual
- Owner's area on the map: 43.5736° N, 116.4009° W: Placed by OpenAirDocs at the center of ZIP code 83642, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=6DF
- Page: https://openairdocs.org/aircraft/N6DF

From the FAA registry file of October 21, 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): 10 in force

### Matched by airframe (Grumman G-21A)

- [AD 79-02-03](https://openairdocs.org/ad/79-02-03): Engine Restart · Grumman American G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B) with STC SA1-52. Effective Jan 29, 1979
- [AD 73-12-06](https://openairdocs.org/ad/73-12-06): Elevator and Rudder Torque Tube Failure · Grumman American G-21 and G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B). Effective Jun 14, 1973
- [AD 72-11-03](https://openairdocs.org/ad/72-11-03): Engine Fuel Starvation · Grumman American G-21 and G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B). Effective May 30, 1972
- [AD 53-24-01](https://openairdocs.org/ad/53-24-01): Stabilizer Strut  Terminal · Grumman American G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B). Effective Aug 17, 1971
- [AD 71-12-03](https://openairdocs.org/ad/71-12-03): Flex Drive Elevator Tab Control · Grumman American G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B). Effective Jun 10, 1971
- [AD 63-27-02](https://openairdocs.org/ad/63-27-02): Rudder Control Push Rod End Fittings · Grumman American G-21 and G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B). Effective Jan 20, 1964
- [AD 53-21-02](https://openairdocs.org/ad/53-21-02): Horizontal Stabilizer Strut · Grumman American G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B)
- [AD 50-15-01](https://openairdocs.org/ad/50-15-01): Mixture Control Rework · Grumman American G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B)
- [AD 49-16-01](https://openairdocs.org/ad/49-16-01): Fuel Tank Baffles · Grumman American G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B)
- [AD 46-38-01](https://openairdocs.org/ad/46-38-01): Vacuum System Tubing · Grumman American G-21 and G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B)

### Matched by engine (Pratt & Whitney R-985 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N6DF.

## FAA accident and incident reports

None matched to N6DF.

## Service difficulty reports

None filed for this aircraft. Reports filed since October 25, 1983, when the mark's previous registration was cancelled.

## Earlier aircraft with N6DF

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N6DF before.

- [Cancelled 1983-10-25](https://openairdocs.org/deregistered/N6DF-1983-10-25): Cessna 207A, S/N 20700491. Exported to Canada. Owner: [Boling George R](https://openairdocs.org/faa-owner/BOLING%20GEORGE%20R), [Houston, TX](https://openairdocs.org/faa-place/TX/Houston)
- [Cancelled 1980-08-06](https://openairdocs.org/deregistered/N6DF-1980-08-06): Beech V35A, S/N D-8841. Owner: [Bingaman Metal Spinning Corp](https://openairdocs.org/faa-owner/BINGAMAN%20METAL%20SPINNING%20CORP), [Rolling Meadows, IL](https://openairdocs.org/faa-place/IL/Rolling%20Meadows)

## Related

- Other Grumman G-21A aircraft: https://openairdocs.org/model/grumman-g-21a/aircraft.md
- STCs for the Grumman G-21A: https://openairdocs.org/model/grumman-g-21a/stcs.md
- The Pratt & Whitney R-985 series engine: https://openairdocs.org/engine/pratt-whitney-r-985-series.md

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