# STC SA2-691

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sierra Industries, Inc, United States
- Description: Flap track and wing trailing edge modification.
- Applied: December 5, 1958
- Status date: December 1, 1999
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS LTC AL-13](https://openairdocs.org/tcds/LTC%20AL-13)
- Certificate PDF: https://openairdocs.org/files/sha256/75/01/7501e9a15d4ab7ef228739a4c7fcadbb41022011e59243903b82d31f2f551d16
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B44F10723E05927585256CC10083D4C7.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2-691

## ADs that name it (0)

None.

## Approved models (1)

- Air Trading Corporation Navy PV-1 ([TCDS LTC AL-13](https://openairdocs.org/tcds/LTC%20AL-13))

## 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.

JIHiittj* plates ©f nf ^ranspcrtattan - ^fe&erai ^Hatton jAhmmtetratton upplemenlal (Eerttftc&te SA2-691 Sierra Industries, Inc., a Texas Corporation Garner Field Road Uvalde, TX 78801 ftteeA, £& Civil Air LTC-13 Lockheed Aircraft Corp.

Flap track and wing trailing edge modification in accordance with Drawing List SD104000-2A dated 4/2/64.

Wing trailing edge modification is a portion of STC SA2-691 and may be installed in combination with Spartan Aircraft flap track modification, Item 4 of STC SA2-550.

cpA-tcA, f& .-December 05, 1958 January 06, 1959 December 01, 1999 .- May 8, 1967 Revision 6 (Signature) Michele M. Owsley, Manager Airplane Certification Office, Southwest Region (Title)

Forn eHo-;(i.o-6B) pags i Of 2 ThlJ cectiflcttf nay be tr*nsforied in accordance with FA* 21-47.

INSTRUCTIONS The transfer endorsement below may be used to notify the appropriate FAA Regional Office o!

the transfer at this Supplemental Typo Ceriiln ale The I1 AA wil! reissue (lie rertihcatr in the name ol (he transferee and forward it TO him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name oj transjeree) (Address uf transferee) (#umbt> and street) (City, Slab, an from (Name of grantor) (Print or type) (Address oj grantor) (Numbf and sttfctj I City, Stale, and QP laltr) Extent of Authority (if licensing agreement):.

Signature of grantor (In ink):

**C FAA AC 69-5S36**

## Every issue (1)

- December 1, 1999: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/75/01/7501e9a15d4ab7ef228739a4c7fcadbb41022011e59243903b82d31f2f551d16)

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