# STC SA2-834

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Signature Flight Support Corporation, United States
- Description: Remove the original 12-inch brass radiators, Harrison P/N 8503274 and rotary valve regulator P/N 8503428; and installation of AiResearch oil cooler P/N 4125-11-1 with regulator P/N 87151-165-13 and valve assembly P/N 18910-2-165-13.
- Applied: March 11, 1959
- 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/e6/70/e670b93c3c911279c0b046c86662cc9ca566d8317db10a29fb5c748ae2c9dde9
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/367376B549D23A8B85256CC10083D4E8.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2-834

## 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: SA2-834 This certificate issued to: Signature Flight Support Corporation, a Delaware Corporation 7511 Lemmon Avenue, Hangar C Dallas, TX 75209 Certifies that the change in the type design for the following product with the limitations and conditions therefor as specified hereon meets the airoorthiness requirement's of Part 4a of the CiVi] Aix Poegulutions.

Original Product Type Certificate Number : 723 Make: Lockheed Model: 18 Description of Type Design Change:

Remove the original 12-inch brass radiators, Harrison P/N 8503274 and rotary valve regulator P/N 8503428; and installation of AiResearch oil cooler P/N 4125-11-1 with regulator P/N 87151-165-13 and Valve assembly P/N 18910-2-165-13.

Note: There is no required change in radiator mounting except 1/2 inch neoprene used for padding in lieu of the original.

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

2 FEDERAL AVIATION ber By Direction of the Administrator S. Frances Cox (Signature) TOMINSTRATIO Manager, Southwest Region Special Certification Office, (Title)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street ) (City, State, and Z1P 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/e6/70/e670b93c3c911279c0b046c86662cc9ca566d8317db10a29fb5c748ae2c9dde9)

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