# STC SA2-561

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sierra Industries, Inc, United States
- Description: Conversion of tail gear actuating cylinder to O ring, type seal.
- Applied: October 16, 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/sha256/09/d1/09d1ad977a8fedad2fed7fc0dc438c9817eb95af10d5c99de93c1c4f8aab68a3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/24596081FEA0D9F085256CC10083D4AE.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2-561

## 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.

•Hmtcb giatc* ®f .

of 'Sraneportatmn - ,3febcral ^fcutiton (Aitmiittstratian upplemeittal Olerttftcate SA2-561 Sierra Industries, Inc., a Texas Corporation Garner Field Road Uvalde, TX 78801 9 o/Me Civil Air LTC-13 Lockheed Aircraft Corp.

PV-1 Conversion of tail gear actuating cylinder to WO" Ring, type seal in accordance with Howard Aero, Inc. Drawing 1496 dated 9/30/58 and Howard Aero, Inc.

Installation Instruction titled "Modification of Lockheed PV-1 Tail Gear Actuating Cylinder."

.- October 16, 1958 November 14, 1958 December 1, 1999 <&&&na*afx£xJ.- May 8, 1967 Revision 3 J^W(Signature) I Michele M. Owsley, Manager I Airplane Certification Office, Southwest Region (Title) Any alteration of thii certificate Is punishable by * fine of not exceeding SI,000, or iBprJjonJDent not exceeding 3 jwars, or both.

FAA Form 6110-2(10-66} 1 of 2 This certificate nay be transferred in accordance urjtj, 21.11.

INSTRUCTIONS, ['he transfer endorsement Maw may be used to notify the appropriate FAA Regional Office of the transfer of this Supplemental T^pc Certificate.

The FAA will reissue ihc- n-rtilicate in (he name of the transferee and forward ii to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) vmtt' and street) , Stair, and Z.IP sodt) from (Name of grantor) (Print or type) (Address of grantor) (Number and ItrtrfJ Cilf.Sult, and £IP code) Extent of Authority (if licensing agreement):.

Signature of grantor (In ink):

**C FAA AC 68-5S36**

## Every issue (1)

- December 1, 1999: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/09/d1/09d1ad977a8fedad2fed7fc0dc438c9817eb95af10d5c99de93c1c4f8aab68a3)

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