# STC SA4359NM

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Heyworth Eugene, United States
- Description: Installation of redesigned upper door hinge pin and retainer.
- Applied: May 26, 1987
- Status date: May 17, 1999
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A13CE](https://openairdocs.org/tcds/A13CE), [TCDS A20CE](https://openairdocs.org/tcds/A20CE)
- Certificate PDF: https://openairdocs.org/files/sha256/64/45/6445764fa05f9e70b38a8ff5a3e8126818976f91ce2b3d58371033376d095d4d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/817DD6B608EFD17085256CC2000E3BD5.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4359NM

## ADs that name it (0)

None.

## Approved models (4)

- Cessna Aircraft Company 177 ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))
- Cessna Aircraft Company 177A ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))
- Cessna Aircraft Company 177B ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))
- Cessna Aircraft Company 177RG ([TCDS A20CE](https://openairdocs.org/tcds/A20CE))

## 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: SA4359NM This certificate issued to: Eugene R. Heyworth 10560 Left Wing Court Silverdale, WA 98383 Part 23 of the Federal Aviation Regulations.

Original Product -Type Certificate Number: A13CE Make: Cessna Model: 177, 177A, 177B, and 177RG Description of Type Design Change: Installation of redesigned upper door hinge pin and retainer in accordance with CTM Avtech Installation Instructions, Revision A, dated January 30, 1999, or later FAA approved revison and Drawing List Report No. 1, Revision B, dated January 30, 1999 or later FAA approved revision.

Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only. This approval should not be extended to other aircraft on which other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this certificate must be maintained as part of the permanent records for the modified aircraft.

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.

Date of Application: May 26, 1987 Date Reissued:

Date of Issuance: September 22, 1988 Date Amended: May 17, 1999 AVIATION By direction f the fol lor do e (Signature) OMINIST RATION Acting Manager, Seattle Aircraft Certification Office (Title)

## Every issue (1)

- May 17, 1999: Amended, Current. [certificate](https://openairdocs.org/files/sha256/64/45/6445764fa05f9e70b38a8ff5a3e8126818976f91ce2b3d58371033376d095d4d)

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