# STC SA2-57

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Executive Acft Svcs Div of Cooper Ind, United States
- Description: Installation of surface combustion heater.
- Applied: December 11, 1956
- Status date: June 28, 1978
- 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/ed/b1/edb1c6eea100d534f5317061afb3b1aa4561804d23492de0a90352af12a24271
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5832C9814E305B2B8625716A004B6026.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2-57

## ADs that name it (0)

None.

## Approved models (1)

- Lockheed Aircraft Corporation 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.

United States of America Bepartment of'Cransportation—federal 2toiation Administration Supplemental 'Cgpe Certificate <LSK<€#msV€wSA2-57 E*a«tt*lva Aircraft Sarviea Dlv. of Coopar Ind«, Inc.

3900 Love Field Drive Delias. Texas 75235 JfoJ£yfi0Jde&<jCtw^w ^y'i«<^!!&i3*:^<s»'«<>7«'^^ 4fl sdltjhe' CtV** iSle-OMta&&nA/.

723 Lockheed 18 of surface combustion Heater, P/N 20C65, Typ« 8200 (d«r«t»d to ISO BTU) in accordance with data listed OB Dallas Aero Service Drawing Uit entitled "Combustion Heater Installation", Rev. I dated 4/8/57, or Rav. t dated 4/24/58 u»ad in conjunction with Rev. I dated 4/8/57, -4ria<>nsan&j?n<>n' Aircraft using Airline Training, Inc. Airplane Flight Manual oust t»a* CAA Approved Bavi«ion dated 1/20/58 by Dallaa Aaro Service with thiB nodif ication.

Aircraft using any other Flight Manual which Includes a haater oparation section mat hava GAA Approved Revision to be eligible with this nodi f teat ion.

Coopatibility of thlt Modification with otiwr pravlowaly approved nodlf ieatlona must b« determined by til* insteller.

, ^^^as^ev^rnj.mM&eWsa^ S$drniM4&&<a£?r-^&^he' 11, 1956 ^^^^/ §/2&/57; 5/5/5t; 8/8/58; 12/5/68;

11/12/69; 2/23/72; 6/28/78 Ravialon 7 January 23, 1957 _ (Signature)

r. Don P. Wateon 8 ' Chief, Engineering and Manufacturing Branch

alteration of this certificate w punishable by a fine of not exceeding $1 ,000, or imprisonment not exceeding 3 years, or both.

fAAFo«M 81 10-2 (10-68)

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

Signature of grantor (In ink):

## Every issue (1)

- June 28, 1978: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ed/b1/edb1c6eea100d534f5317061afb3b1aa4561804d23492de0a90352af12a24271)

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