# STC SA1105SO

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Blue Bell Inc, United States
- Description: Installation of Bendix ALA-51 radio altimeter and GPW-83 ground proximity warning system.
- Status date: June 19, 1986
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A20](https://openairdocs.org/tcds/1A20)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8C3DEEDAE42F99C185256CC10080DE0E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1105SO

## ADs that name it (0)

None.

## Approved models (1)

- Bombardier Inc. CL-44D4 ([TCDS 1A20](https://openairdocs.org/tcds/1A20))

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