# N9991: Travel Air B-4000, registration cancelled 1931-06-03

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: June 3, 1931
- Status when cancelled: Valid registration
- Airframe: [Travel Air B-4000](https://openairdocs.org/model/travel-air-b-4000) (registry code 2621820)
- Serial number: 1167
- Type of aircraft: Fixed wing single engine
- Certificate issued: October 1, 1929
- Mode S code: ADF68D
- Owner when cancelled: [Union Oil Co Of California](https://openairdocs.org/faa-owner/UNION%20OIL%20CO%20OF%20CALIFORNIA)
- Location: [Los Angeles, CA](https://openairdocs.org/faa-place/CA/Los%20Angeles)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N9991
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=9991
- Page: https://openairdocs.org/deregistered/N9991-1931-06-03

From the FAA registry file of November 4, 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 Travel Air B-4000: https://openairdocs.org/model/travel-air-b-4000.md

## Other aircraft with N9991

- [Registered now](https://openairdocs.org/aircraft/N9991): Cirrus Design SR22, S/N 0079, built 2001
- [Cancelled 2012-11-14](https://openairdocs.org/deregistered/N9991-2012-11-14): Taylor B-8M, S/N W0-001. Revoked, canceled. Owner: [Oldhouser Woodrow](https://openairdocs.org/faa-owner/OLDHOUSER%20WOODROW), [Dover, PA](https://openairdocs.org/faa-place/PA/Dover)

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