# STC SA778CE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Boeing Company, United States
- Description: Addition of large cargo door in left hand side of fuselage. (707-321)
- Status date: June 1, 1971
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A26](https://openairdocs.org/tcds/4A26)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/22D4E0D56976751785256CC20056A492.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA778CE

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 707 ([TCDS 4A26](https://openairdocs.org/tcds/4A26))

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