# STC SA2-313

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Signature Flight Support Corporation, United States
- Description: Installation of 100,000 BTU Janitrol Heater in nose. (LOCKHEED 18 S/N 2477; 2309 only)
- Applied: September 27, 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/ea/17/ea17489bbefb37fb0640bdfd5c8537b93b2c4ce36d1bed4c35ccf039b4a98efc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8990B7F854903BA786257D5B0049B7FA.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2-313

## 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

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.

•Hmtfb j&tatts ©f .Awwrtot ieparimtnt 0f transportation - ,3feberal JV&iatton ^ministration upplemmtol Certificate SA2-313 Signature Flight Support Corporation, a Delaware Corporation 7511 Lemmon Avenue, Hangar C Dallas, TX 75209 Civil Air 723 Lockheed 18 Installation of 100,000 BTU Janitrol Heater in nose in accordance with Howard Aero Engineering Report No. 8 as revised 5/19/58, or later FAA approved revision. .. ,„ -..,-, , • 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. 2477 and Serial No. 2309, only.

September 27, 1957 08, 1960 . 6/15/92; 12/21/98; 8/31/00 .-June 30, 1982 Rev. 8 (Signature) S. Frances Cox Manager, Special Certification Office, Southwest Region (Tirte) Any sJteratlon of thi, certificats U punllhibj* fcy i fine of not excMflin., SI,000, or iBprUonownt not eicsedJn? 3 years, or both.

FAfl Font 8110-2(10-68) Pag» 1 of 2 TftJa c*rtlflc»t» nay be transferred In accord»ncs with FUft

The i-'AA will reissue the (militate in the name of" the transferee and forward it [o him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name oj transferee) (Address of transferee) umbf and It'trl f (City, Stair, and ^IP indl) from (Name of grantor) (Print or type) (Address of grantor) (dumber and il'ttt} (City, Slair, and ZIP coJr) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

**C FAA AC 69-5538**

## Every issue (1)

- August 31, 2000: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ea/17/ea17489bbefb37fb0640bdfd5c8537b93b2c4ce36d1bed4c35ccf039b4a98efc)

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