# STC ST09663SC

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Boeing Company, United States
- Description: Installation of Terrain Awareness and Warning System (AlliedSignal Enhanced Ground Proximity Warning System). Approved for model 747-200 (E4A/E4B)
- Status date: May 16, 2001
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3F57EB0CF680EF0885256CC300035E99.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST09663SC

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 747-200 Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))

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