# STC SA2-27

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Signature Flight Support Corporation, United States
- Description: Installation of Stewart Warner Model 940 heater. (LOCKHEED 18 S/N 2548; 2588 only)
- Status date: August 31, 2000
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-723](https://openairdocs.org/tcds/A-723)
- Certificate PDF: https://openairdocs.org/files/sha256/df/90/df906b6d29c95ac9a155205c6b0209d97271c5dde8cf171fc4c6147f0d0e4a05
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C1FA7E71338F60F985256CC10083D467.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2-27

## ADs that name it (0)

None.

## Approved models (1)

- Lockheed Aircraft Corporation Lockheed 18 ([TCDS A-723](https://openairdocs.org/tcds/A-723))

## 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.

Bepartmmt of transportation - ^fe&Eral ^faiatton 1A&mmistratunt (E^rttftt&te SA2-27 Signature Flight Support Corporation, a Delaware Corporation 7511 Lemmon Avenue, Hangar C Dallas, TX 75209 5R4Q1 723 Lockheed 18 Civil Air ;* it! = Installation of Stewart Warner Model 940 heater according to Howard Aero Service, Inc., Drawing No. NS 12 title 940 Heater.

Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation made in Lockheed Model 18, Serial No. 2548 and Serial No. 2588, only.

ee&ca, &1 31, 1956 October 04, 1956 .- 6/1/92; 12/21/98; 8/31/00 .- July 20, 1982 Rev, 9 S. Frances Cox Manager, Special Certification Office, Southwest Region Any •Iteration of thJs ctrtlflcmtr ij punlshtblf by 4 flnt at not •KC*edln(T $1,100, at inprlsoniwnt not exceeding 3 yearj, or both.

Fo» 8110-2(10-68) Pag* 1 of 2 This ctrtlflcatf may be Iranaferffd in tfccxtj-djnce with FAK

INSTRUCTIONS; 'I'he [r.insftr endorsement below may be used to notify the appropriate FA A Regional Office of the Transfer uff this Supplemental Type- t^ertifirale.

The FAA will reissue- ihf rrrtifiratc in the name of the transferee and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certih'cate Number to (Name of transferee) (Address o (Numbts and Itreet) (City, Stair, an from (Name of grantor) (Print or type) (Address of grantor) {dumber at/I flrffl) (City, Sialt. and?JPsodt) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

**C FAA AC 69-5536**

## Every issue (1)

- August 31, 2000: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/df/90/df906b6d29c95ac9a155205c6b0209d97271c5dde8cf171fc4c6147f0d0e4a05)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.