# N69GP: 1970 Cessna 421B, registration cancelled 2002-11-18

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: November 18, 2002
- Status when cancelled: Second triennial mailing, no response
- Airframe: [Cessna 421B](https://openairdocs.org/model/cessna-421b) (registry code 2076014)
- Engine: [Continental GTSIO-520-C](https://openairdocs.org/engine/continental-gtsio-520-c) (registry code 17035)
- Data sheets: [TCDS A7CE](https://openairdocs.org/tcds/A7CE), [TCDS E7CE](https://openairdocs.org/tcds/E7CE) (OpenAirDocs)
- Serial number: 421B0027
- Year built: 1970
- Type of aircraft: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: July 17, 1970
- Certificate issued: May 20, 1999
- Last registry action: June 4, 2002
- Mode S code: A92901
- Owners when cancelled: [Thompson Gary P](https://openairdocs.org/faa-owner/THOMPSON%20GARY%20P), [Thompson Julie](https://openairdocs.org/faa-owner/THOMPSON%20JULIE), [Thompson Elliott P](https://openairdocs.org/faa-owner/THOMPSON%20ELLIOTT%20P), [Thompson Thelma M](https://openairdocs.org/faa-owner/THOMPSON%20THELMA%20M)
- Location: [Mammmoth Lakes, CA](https://openairdocs.org/faa-place/CA/Mammmoth%20Lakes)
- Owner type: Co-owned
- Owner's area on the map: 37.5515° N, 118.8409° W: Placed by OpenAirDocs at the center of ZIP code 93546, within about 9 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N69GP
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=69GP
- Page: https://openairdocs.org/deregistered/N69GP-2002-11-18

From the FAA registry file of October 28, 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 Cessna 421B: https://openairdocs.org/model/cessna-421b.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 LAX00LA004](https://openairdocs.org/ntsb/LAX00LA004), Oct 5, 1999: Cessna 421B (N69GP), Montague, CA, substantial damage. Probable cause: The collapse of the left main landing gear during the landing rollout for undetermined reasons, which resulted in the pilot's loss of directional control.

## 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 19991004043919A](https://openairdocs.org/incident/19991004043919A), Oct 4, 1999: Cessna 421B (N69GP), Montague, CA, Substantial damage. (-23) Left main landing gear (MLG) collapsed on roll-out causing a/c to veer off runway striking several parked a/c. teh a/c was declared totaled by the…

## Other aircraft with N69GP

- [Registered now](https://openairdocs.org/aircraft/N69GP): Hirsty Ronald MURPHY ELITE, S/N 639E, built 2008

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