# STC SA2609WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Steward-Davis Intn'l Inc, United States
- Description: ONE ONLY STC - Boeing Model 707-353B, serial number 20630 - Installation of Steward-Davis, Inc. modified Airesearch auxiliary power unit model GTCP85-98CK
- Applied: October 25, 1972
- Status date: November 9, 1990
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A26](https://openairdocs.org/tcds/4A26)
- Certificate PDF: https://openairdocs.org/files/sha256/16/ef/16efd5746075300d0123896e53ba0e12b81d48bee41b5300475c3aed93fb8634
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0F8D7DDAE946746A85256CC20008C665.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2609WE

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 707 ([TCDS 4A26](https://openairdocs.org/tcds/4A26))

## What the certificate says

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

8103 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA2609WE This certificate issued to: Steward-Davis International, Inc.

Puri * of the CiVil Air Regulations* See certification basis T.C.D.S. 4A26 Original Product - Type bertificate Number: 4A26 Make: Boeing Model: 707-353B Description of Type Design Change: Installation of Steward-Davis, Inc. modified AiResearch Inc. Master Drawing List No. 70000, Revision "C," or subsequent FAA sealed revisions auxiliary power unit model GTCP85-98CK in accordance with FAA sealed Steward-Davis, Data pertaining to this modification are considered inadequatientelpkiestion in other aircraft. This approval is limited to the empty weight and C.G. must be revised to account for this installation. installation made in Boeing Model 707-353B, serial number 20630, only. The airplane The loading schedule must also be appropriately revised, accounting for the change in the aft belly compartment capacity, to assure that the airplane can be loaded within dated December 22, 1972 is required with this installation. approved limits. FAA approved Steward-Davis, inc. Airplane Flight Manual Supplement This estate and the supporting dalu on a hear pr the supporling dalu which is the bas is for appre val shalt remain in effect until sur rendered, suspended, revoked, or a lermination dale is othervise established by the Administrat r of the Federal Aviation Administration .

Date of Application: October 25, 1972 Jule missued: NOV. 9, 1990 Date of Issuance: December 22, 1972 Sale unended: August 3, 1973 FEDERAL AVIATION By Direction of the Administrator Signature Angeles Aircraft pon Manager, Los T MINISTRATO Certification Office (Title)

## Every issue (1)

- November 9, 1990: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/16/ef/16efd5746075300d0123896e53ba0e12b81d48bee41b5300475c3aed93fb8634)

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