# STC SA2-1129

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Signature Flight Support Corporation, United States
- Description: Hydraulic system pressure increase to 1050 p.s.i.
- Applied: February 3, 1961
- Status date: August 31, 2000
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-723](https://openairdocs.org/tcds/A-723)
- Certificate PDF: https://openairdocs.org/files/sha256/09/84/09846665ef671fe2360a94d8247a90486e2c7961a4beeba24fd510278f63fbe5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F4445974602376B485256CC10083D41F.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2-1129

## ADs that name it (0)

None.

## Approved models (1)

- Lockheed Martin Aeronautics Company 18 ([TCDS A-723](https://openairdocs.org/tcds/A-723))

## 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: SA2-1129 This certificate issued to: Signature Flight Support Corporation, a Delaware Corporation 7511 Lemmon Avenue, Hangar C Dallas, TX 75209 Purt SR407 of the Civil Aix Regulations Original Product Type Certificate Number: 723 Make: Lockheed Model: 18 Description of Type Design Change:

Hydraulic system pressure increase to 1050 p.s.i. in accordance with Drawing List No. SD403000-1T dated 4/11/66, or later FAA approved revision.

This STC is part of the basic H250 and H250 Tri-Gear configurations and the flight manuals apply to appropriate model.

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

Date of Application: February 03, 1961 Date Reissued: 7/10/92; 12/21/98; 8/31/00 Date of Issuance: February 23, 1962 Date Amended: May 26, 1982 Rev. 11 FEDERAL AVIATION By Direction of the Administrator (Signature) S. Frances Cox TOMINISTRATO Manager, Special Certification Office, Southwest Region (Title)

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

Signature of grantor (In ink):

**FAA AC 69-5536**

## Every issue (1)

- August 31, 2000: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/09/84/09846665ef671fe2360a94d8247a90486e2c7961a4beeba24fd510278f63fbe5)

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