# STC SA2-238

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Signature Flight Support Corporation, United States
- Description: The anti-icer system altered to incorporate all anti-icer fluid into one tank rather than the original four-tank system
- Applied: June 5, 1957
- 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/sha256/3c/8b/3c8b42c91b7f0de802f3478b72f2807bfb5045b3c8654ee6362981346a4cfa5e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/07B3CB287B62024F85256CC10083D461.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2-238

## 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 572-238 This certificate issued to: Signature Flight Support Corporation, a Delaware Corporation 7511 Lemmon Avenue, Hangar C Dallas, TX 75209 Part 4a of the CiviI Aix Regulations.

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

The anti-icer system altered to incorporate all anti-icer fluid into one tank rather than the original four-tank system.

Alterations shown on EAS Dwg. #342542 Sheets #1 thru #5 dated April 23, 1957, or later FAA approved revision.

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

Date of Application: June 05, 1957 Date Reissued: 6/15/92; 12/21/98; 8/31/00 Date of Issuance: August 16, 1957 Date Amended: 1/27/81; 6/30/82 Rev. 2 FEDERAL AVIATION By Direction of the Administrator (Signature) S. Frances Cox TOMINISTRATIOR Manager, Special Certification Office, Southwest Region (Title)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferce) (Number and street) (City, State, and ZIP code) from (Name of grantor) (Print or type) - (Address of grantor) (Number and street) (City, State, and ZIP 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/sha256/3c/8b/3c8b42c91b7f0de802f3478b72f2807bfb5045b3c8654ee6362981346a4cfa5e)

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