# STC SA639AL

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Jet Accessories Inc, United States
- Description: Installation of Model EP-110 starter/generator decoupler system on Models 23, 24, 25 airplanes using Bendix Model30B-37 starter generators.
- Applied: November 4, 1976
- Status date: February 7, 1983
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A10CE](https://openairdocs.org/tcds/A10CE), [TCDS A5CE](https://openairdocs.org/tcds/A5CE)
- Certificate PDF: https://openairdocs.org/files/sha256/fc/8d/fc8d4fddecbca86a23492265ba6d0a3d5dd1784bcb766ebf4c24a42b3dfb0de7
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/80AC74EAC86788D985256CC200569F41.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA639AL

## ADs that name it (0)

None.

## Approved models (3)

- Learjet Inc. 23 ([TCDS A5CE](https://openairdocs.org/tcds/A5CE))
- Learjet Inc. 24 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 25 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

P/N sone United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA639AL This certificate issued to: Jet Accessories 12810 E. Control Tower Roac Suite 206 Englewood, Colorado 80112 Part 3 & 2 of the , Civil Air and Federal Aviation Regulations.

Original Product -Type bertificate Number: ASCE & AIOCE Make: Gates Learjet Corp.

Model: 23, 24 and 25 Description of Type Design Change:

Installation of model EP-110 starter/generator decoupler system on Learjet Models 23, 24 and 25 airplanes using Bendix Model 30B-37 starter generators. The model EP-001 starter/generator decoupler system is fabricated per FAA sealed drawings listed on 455-9 or of ter A apriced revision instantation of the starter therator system is per FAA sealed Jet Accessories, Inc., Installation Instructions II-400-0011 (pages 1 thru 13) dated May 30, 1978, or later FAA approved revision.

See (Continuation Sheet) page 3 of 3 pages.

r of the Federal Aviation Administration .

Date of Application: November 4, 1976 Jule missued: February 7, 1983 Date of Issuance: . June 28, 1978 Jale unended: January 29, 1919 FEDERAL August 15, 1978 AVIATION By direction of the stamina salin nark ½. ibalduru *, 1979 Mark E. Baldwin, (Signature) Manager TAMIN STRATOR Denver Aircraft Certification Field Office Northwest Mountain Region, Aurora, Colorado (Title)

47.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA639AL Limitations and Conditions:

The FAA approved Airplane Flight Manual Supplement (vet Accessories, inc., document AFM-400-0011, pages 1 thru 4), dated June 28, 1978, or later approved revision, is a part of this approval and must be attached to the basic Airplane Flight Manual when the model EP-001 starter/generator decoupler system is installed.

This approval should not be extended to airplanes of these models on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any other previously approved modifications will introduce no adverse effect upon the airworthiness of the aircraft.

- - END- - -

**FAA FORM 8110-2-1 (10-69) PAGE 3 OF 3 PAGES**

## Every issue (1)

- February 7, 1983: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/fc/8d/fc8d4fddecbca86a23492265ba6d0a3d5dd1784bcb766ebf4c24a42b3dfb0de7)

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