# N638: Sikorsky HSS-1, registration cancelled 1960-08-10

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: August 10, 1960
- Exported to: Japan
- Status when cancelled: Valid registration
- Airframe: [Sikorsky HSS-1](https://openairdocs.org/model/sikorsky-hss-1) (registry code 8141820)
- Serial number: SS581144
- Type of aircraft: Rotorcraft
- Certificate issued: January 21, 1960
- Mode S code: A85B73
- Owner when cancelled: [United Aircraft Corp](https://openairdocs.org/faa-owner/UNITED%20AIRCRAFT%20CORP)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N638
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=638
- Page: https://openairdocs.org/deregistered/N638-1960-08-10

From the FAA registry file of October 31, 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 Sikorsky HSS-1: https://openairdocs.org/model/sikorsky-hss-1.md

## Other aircraft with N638

- [Registered now](https://openairdocs.org/aircraft/N638): Focke Wulf 44J STIEGLITZ, S/N 638, built 1938
- [Cancelled 1938-05-16](https://openairdocs.org/deregistered/N638-1938-05-16): Lincoln STANDARD 5, S/N 103. Owner: [Whittemore Fred](https://openairdocs.org/faa-owner/WHITTEMORE%20FRED), [Minneapolis, MN](https://openairdocs.org/faa-place/MN/Minneapolis)
- [Cancelled 1928-09-08](https://openairdocs.org/deregistered/N638-1928-09-08): Lincoln Standard BIPLANE, S/N 47350, built 1927. Owner: [Whittemore Fred](https://openairdocs.org/faa-owner/WHITTEMORE%20FRED), [Minneapolis, MN](https://openairdocs.org/faa-place/MN/Minneapolis)

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