# STC SA4581SW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC system 60, Pitch Stabilization System Model ST-507 with optional autotrim system.
- Applied: November 18, 1981
- Status date: January 11, 1982
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A15](https://openairdocs.org/tcds/1A15)
- Certificate PDF: https://openairdocs.org/files/sha256/05/d0/05d0c44dbdad667ea0547e618c856900adae04c3e718355c47a033ecebdcb735
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1B66660F547D3B4D85256CC2000E3D4F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4581SW

## 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.

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United $tatts of amtrica Bepartmtnt of transportation—Jptdtral aviation administration Supplemental t^pe Certificate i/we&rbver' SA4581SW Project A5606SW-DSFKP-130 S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, Texas 76067-9990 v^M#Jyfadefa:pmfi^.Jfoe/fi6ktvtiwfw^^ Civil Air 1A15 Piper See Limitations and Conditions installation of S.TEC system 60, Pitch Stabilization System, Model ST 057 with Optional Autotrim System, according to Bulletin No. 160, dated 11-11-81 and Master Drawing List No. 9254, dated 11-11-81, or later FAA approved revision.

See Limitations and Conditions ^ ^ 3, 1981 January 11, 1982 (Signature) 5on P. Watson Acting Chief, Aircraft Certification DlvlBion

FAA FoiM 8110-2 (10-68)

Unittfl £tatu of airerira Bepartmcnt of i;ransportation— federal aoiation administration topplemtntal ITgpe Certificate(Continuation &heet) SA4581SW Limitations and Conditions :

1. This modification is eligible on Piper Models PA-24 (PA-24-180), PA-24-250, and PA-24-260, S/N 24-4803 and below (except S/N 24-4783 and these models when modified in accordance with STC SA4 1351 or STC SA4-1235 as applicable (Wing Tip Tanks)

2. FAA Approved Airplane Flight Manual Supplement P/N 8958 dated 1-11-82 is required for Piper Models PA-24 (PA-24-180), PA-24-250 and PA-24-260, S/N 24-4803 and Below (Except S/N 24-4783) and the above models when modified in accordance with STC SA4-1351 or STC SA4-1235 as applicable (Wing Tip Tanks) with S-TEC System 60 Pitch Stabilization System (14 volt system)

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

FAA FORM 8110-2-1 (1O-69) This certificate may he transferred in accordance with FAR 21.47.

PAGE 2°F 2PAGES

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and <YF code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street j (City, State, and <7P code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink): _

## Every issue (1)

- January 11, 1982: Issued, Current. [certificate](https://openairdocs.org/files/sha256/05/d0/05d0c44dbdad667ea0547e618c856900adae04c3e718355c47a033ecebdcb735)

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