# STC SA1755NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sierra Industries Ltd., United States
- Description: Installation of positive flap retraction system.
- Applied: September 20, 1982
- Status date: July 31, 2017
- Product: Aircraft, Small Airplane
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 1A15](https://openairdocs.org/tcds/1A15)
- Certificate PDF: https://openairdocs.org/files/sha256/bd/c1/bdc1866673855022c58e0e828560037abd4cc6ca04aec2b1ae3493648a999a2b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6C7831F9142378CC8625871F0049CF09.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1755NM

## ADs that name it (0)

None.

## Approved models (3)

- Piper Aircraft Inc. PA-24 ([TCDS 1A15](https://openairdocs.org/tcds/1A15))
- Piper Aircraft Inc. PA-24-250 ([TCDS 1A15](https://openairdocs.org/tcds/1A15))
- Piper Aircraft Inc. PA-24-260 ([TCDS 1A15](https://openairdocs.org/tcds/1A15))

## 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.

FAA Form 8110-2 (5/14) Page 1 of 2

Reissued on July 31, 2017 to supersede the original STC, which has been lost or misplaced.

Number: SA1755NM

Part 3 of the Civil Air Regulations.

Original Product – Type Certificate Number: 1A15 Make: Piper Model: PA-24, PA-24-250, and PA-24-260

Installation of positive flap retraction system in accordance with FAA sealed Robertson Aircraft Drawing List No. 21, Sierra Industries Drawing List 21, Revision C, dated March 8, 1989 or later FAA approved revision.

Compatibility of this modification with previously installed equipment must be determined by installer. 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: September 20, 1982 Date Reissued: 11/8/84; 10/10/86; 9/8/05; 07/31/17 Date of Issuance: October 27, 1982 Date Amended: April 10, 1990 Rev. 1

Signature

Title Jim Grigg Manager, Fort Worth A CO Branch, Compliance & Airworthiness Division Sierra Industries, Ltd.

122 Howard Langford Drive Uvalde, TX 78801

FAA Form 8110-2 (5/14) Page 2 of 2

Transfer the ownership of Supplemental Type Certificate Number: SA1755NM

To (Name and address of transferee)

From (Name and address of grantor)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA18NW

FAA Form 8110-2 (5/14) Page 3 of 3

## Every issue (2)

- July 31, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/bd/c1/bdc1866673855022c58e0e828560037abd4cc6ca04aec2b1ae3493648a999a2b)
- September 8, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/b6/70/b67030aeb3456d05323d2d61a7b49c91b1749fccc5bc7005fdfad3cffcabd1c4)

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