# STC SA1551WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Celesco Industries, United States
- Description: Installation of fire warning moni- toring circuit in engine fire detection system. (707-331)
- Status date: June 8, 1973
- 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/B79C7A24EE3762FF85256CC100821327.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1551WE

## ADs that name it (0)

None.

## Approved models (1)

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

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