# STC SA1155SO

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Aeronautical Engineers, Inc, United States
- Description: Installation of cargo floor, cargo restraint bulkhead, landing gear position indicator, and smoke detection system (Class 'E' cargo compartment).
- Status date: July 24, 1980
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A21](https://openairdocs.org/tcds/4A21), [TCDS 4A26](https://openairdocs.org/tcds/4A26)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CE22E7695ECC126485256CC10080DF06.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1155SO

## ADs that name it (0)

None.

## Approved models (3)

- The Boeing Company 707-200 ([TCDS 4A21](https://openairdocs.org/tcds/4A21))
- The Boeing Company 707-300 ([TCDS 4A26](https://openairdocs.org/tcds/4A26))
- The Boeing Company 707-400 Series ([TCDS 4A26](https://openairdocs.org/tcds/4A26))

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