# STC SA09455AC-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-878,
- Applied: June 13, 2000
- Status date: October 23, 2001
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A13CE](https://openairdocs.org/tcds/A13CE)
- Certificate PDF: https://openairdocs.org/files/sha256/ad/9d/ad9d23000b076f7248a353b3bc0248e71974d203f146c45fb2b85f332552d4bf
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4B97CA660687383D85256CC1007F3B14.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09455AC-D

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 177B ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA09455 AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Certifies that the change in the type design for the folloring pruct with the limitations and conditions therefor as specifed hereon meet the aurorthinss requiements of Fart 23 of the Fadead / viation Regulations.

Original Product Type Certificate A umber: A13CE Al ate : Cessna Model: 177B Description of Type Design Change:

Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-878, according to Bulletin No. 978, Revision 1, dated 10-23-01 and Master Drawing List No. 921189, Revision A, dated 10-23-01 or later FAA Approved revisions of the above data (28 Volt System).

(See Continuation Sheet, Page 2, a part of this STC.)

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.

Tute of affilication: 6-13-00 Late wissued :

Late of ismance : 6-15-00 Date Amended: 10-23-01 By Direction of the Administrator FEDERAL AVIATION (Signature) TOMINISTRATO Michael Keiran DAS Staff Coordinator, DAS 5 SW (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA09455 AC-D Limitations and Conditions: (con't.)

Also eligible on model 177B when modified per STC SA1060CE (Horton STOL).

2. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 892041, dated 6-15-00 is required for Cessna model 177B and model 177B when modified per STC SA1060CE (Horton STOL) or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 892041, Revision 1, dated 10-23-01 is required for Cessna model 177B and model 177B when modified per STC SA1060CE (Horton STOL) for S-TEC System 55/55X or later FAA Approved

4. Compatibility of this modification with other previously approved modifications must be determined by the installer.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ZIP code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and ZIP code ) Extent of Authority (if licensing agreement): - Date of Transfer:

Signature of grantor (In ink):

## Every issue (1)

- October 23, 2001: Amended, Current. [certificate](https://openairdocs.org/files/sha256/ad/9d/ad9d23000b076f7248a353b3bc0248e71974d203f146c45fb2b85f332552d4bf)

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