# STC SA2-277

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Signature Flight Support Corporation, United States
- Description: Installation of radar antenna, radome nose and fairing.
- Applied: June 6, 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/sha256/54/7d/547d4accfc5b51c012e6337c8285e1d665a211b3504530facebe7d16b3d549f6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7ED0BD2CB4045A0F85256CC10083D46A.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2-277

## 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.

<©f .Amtrira of ^Kraitsp0rlaii0n - .Sfe&tral ^(nation (Eerttftcate SA2-277 signature Flight Support Corporation, a Delaware Corporation 7511 Lemmon Avenue, Hangar C Dallas, TX 75209 Civil Air 723 Lockheed 18 Installation of radar antenna, radonte nose and fairing in accordance with Drawing List ASD5Q1000-1C dated 10/25/63, or later FAA approved revision.

efJtfft &fV7t&-&cvhA.- STC SA2-70 or SA2-537 or SA2-572 airspeed system is required on L-18 aircraft.

STC SA2-70 is required for Howard 250.

Howard Aero, Inc. CAA Approved Airplane Flight Manual Supplement dated 3/3/59 is required with STC SA2-537 (airspeed system on L-18 aircraft!.

Separate approval is required for electrical installation of radar.

This STC is part of the Howard 250 modification.

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

tf A&J.& >&» ty&&0ttif6£fi*&e?<^60Uf-est eft q$&c£ tfft&f .- June 06, 1957 October 31, 1958 ; 12/21/98; 8/31/00 . June 30, 1982 Rev. 11 (Signature) S. Frances Cox Manager, Special Certification Office, Southwest Region (TVrte) Any Alteration ot this fr«rClfic*t* lJ punishable by p fine of not exceeding $1,000, or lafrlsonovnt. not fxceedinq 3 years, or both* FAA Fon> GllQ-2(10-6B) Pag« 1 of 2 ThJj certificate fcjy be transferred in accordance uJrh FAR 21-47.

[ NS 1'RUCTIONS 1 he transfer rndorscmrnl hclow may be used lo noli fy ihr appropriate FA A Regional Office of the transfer of this Supplemental Type Ortihcalc.

The ]-'AA will reissue the irrlificalc in (he name of thr transferee and forward it lo him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name oj transferee) (Address of transferee) umbf> aid tf't(t) (Clly, Stair, anrf ZIP loit] from (Name of grantor) (Print or type) (Address of grantor) t Number and strrct) (City, Slalt, an Extent of Authority (if licensing agreement):

Signature of grantor (In ink):.

C FA A AC 69-5536

## Every issue (1)

- August 31, 2000: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/54/7d/547d4accfc5b51c012e6337c8285e1d665a211b3504530facebe7d16b3d549f6)

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