# STC ST22BO

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Whelen Engineering Co Inc, United States
- Description: Replacement of Grimes power supply P/N 60-2799-1 and position light P/N's 30-1085-15/-16 with Whelen power supply P/N 01-0790101-04 and position light P/N's 01-790159-()
- Applied: June 17, 1993
- Status date: March 31, 2008
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A22CE](https://openairdocs.org/tcds/A22CE)
- Certificate PDF: https://openairdocs.org/files/sha256/f7/0f/f70f574d5af98d8d238d361418af30639030392ee9aeeb32ecad17ee4263b62d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A6901707B98C3E3186257424007EDB8C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST22BO

## ADs that name it (0)

None.

## Approved models (3)

- The Cessna Aircraft Company 550 ([TCDS A22CE](https://openairdocs.org/tcds/A22CE))
- The Cessna Aircraft Company 560 ([TCDS A22CE](https://openairdocs.org/tcds/A22CE))
- The Cessna Aircraft Company S550 ([TCDS A22CE](https://openairdocs.org/tcds/A22CE))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- March 31, 2008: Amended, Current. [certificate](https://openairdocs.org/files/sha256/f7/0f/f70f574d5af98d8d238d361418af30639030392ee9aeeb32ecad17ee4263b62d)

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