# STC SA10944SC

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Lycoming Engines, Operating Div. Of AVCO, United States
- Description: Installation of a 210 HP Lycoming IO-390-A1A6 Engine
- Applied: January 21, 2008
- Status date: June 16, 2009
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21, Part 23
- Data sheets: [TCDS A20CE](https://openairdocs.org/tcds/A20CE)
- Certificate PDF: https://openairdocs.org/files/sha256/a4/6f/a46f3a07aed2680ad02f06bb6ba9218339f9644d1c2fab52983781e91d65a325
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EC196A7FD29ACF4C86257AC60073F9B0.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA10944SC

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 177RG ([TCDS A20CE](https://openairdocs.org/tcds/A20CE))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

Part 23 of the Federal Aviation Regulations.

Description of Type Design Change: Installation of a 210 HP Lycoming IO-390-A1A6 Engine in accordance with Alamo Aerospace master Drawing List, Drawing No. 1600, Rev D dated October 06, 2009, or later FAA approved revision. FAA approved Alamo Aerospace Flight Manual Supplement No. AFMS 55068-5 Rev. A, dated January 04, 2010, or later FAA approved revision required. Instructions for Continued Airworthiness are contained in Alamo Aerospace Report 55068-6, Rev. A, dated September 30, 2009.

Limitations and Conditions: The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Lycoming Engines, Operating Div. Of AVCO 652 Oliver St.

Williamsport, PA 17701 A20CE Make : Cessna Model : 177RG Date of application: January 21, 2008

Date of issuance: May 20, 2009

Date reissued: June 16, 2009

( Signature) S. Frances Cox Manager, Special Certification Office Southwest Region

( Title)

FAA Form 8110-2-1(10-69) Page 2 of 2

## Every issue (2)

- June 16, 2009: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/a4/6f/a46f3a07aed2680ad02f06bb6ba9218339f9644d1c2fab52983781e91d65a325)
- May 20, 2009: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/b2/8e/b28e0e1e641eb85785ba98d1677d17e366bc8b3b9dff666b8879b26966e507b2)

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