# STC SA608EA

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: Garrett Aviation Services, United States
- Description: Installation of dual Sperry SPI-73E flight director.
- Applied: April 26, 1968
- Status date: December 14, 2005
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A12EA](https://openairdocs.org/tcds/A12EA)
- Certificate PDF: https://openairdocs.org/files/sha256/b0/d3/b0d3809fadd3375228a6212859db37dc6aff544ed5c151a7826884d2bc8b1d95
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/15A9DCE98D4B3569862570F1006AC85C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA608EA

## ADs that name it (0)

None.

## Approved models (1)

- Gulfstream Aerospace Corporation G-1159 ([TCDS A12EA](https://openairdocs.org/tcds/A12EA))

## 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.

FAA Form 8110-2(10-68) Page 1 of 1 “Reissued on October 21, 2005 to supercede the original STC which has been lost or misplaced.”

Number SA608EA This certificate issued to Garrett Aviation Services, LLC Long Island MacArthur Airport 2221 Smithtown Avenue Ronkonkoma, NY 11779

Part 25/4b of the Federal Aviation Regulations.

Original Product -- Type Certificate Number : A12EA Make : Grumman

Model : G1159

Installation of dual Sperry SPI-73E Flight Director Systems in accordance with AiResearch Aviation Company Drawings #507-G2- 1000, dated January 6, 1968 and #508-G2-1000, dated December 29, 1967.

AiResearch Aviation Company’s FAA Approved Flight Manual Supplement dated April 29, 1968 for installation of dual Sperry SPI- 73E Flight Director Systems in Grumman G-1159 aircraft required.

1. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

2. Compatibility of this design change with previously approved modifications must be determined by the installer.

Date of application : April 26, 1968

Date of issuance : April 29, 1968 Date reissued : October 21, 2005, November 7, 2005

( Signature) Anthony Socias Manager New York Aircraft Certification Office

(Title)

## Every issue (3)

- December 14, 2005: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/b0/d3/b0d3809fadd3375228a6212859db37dc6aff544ed5c151a7826884d2bc8b1d95)
- November 7, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/b0/d3/b0d3809fadd3375228a6212859db37dc6aff544ed5c151a7826884d2bc8b1d95)
- October 21, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/5e/f0/5ef007ffdcfe63060d4e4d8c46118fbe0c81a535f8e287ac2b640b57168034d4)

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