# STC SA5712NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Olin Aerospace Company, United States
- Description: Direct replacement of existing certified Window Heat Control Units with Olin Aerospace Window Heat Control Units built.
- Applied: November 5, 1991
- Status date: May 4, 1994
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/88/4b/884b09be63be7b7df7a865f22f4fb11c26d079ead77672aeae6ffad889689d92
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8749BC86AE7D98F585256CC200122AE6.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA5712NM

## ADs that name it (0)

None.

## Approved models (2)

- The Boeing Company 727-100 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))
- The Boeing Company 727-200 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))

## What the certificate says

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

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA5712NM This certificate issued to: .. 11441 Willows Road N.E. Olin Aerospace Company P. O. Box 97009 Redmond, WA 98073-9709 Purt 25 of the Federal Aviation Regulations:

Original Product - Type berlificate Number: A3WE Make: Boeing Model: 727-100, 727-200 Description of Type Design Change: Direct replacement of existing certified Window Heat Control Units with Olin Aerospace Window Heat Control Units built in accordance with Olin Aerospace Top Drawing 231-3, or later FAA-approved revision.

Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporatedunless it is etermined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate must be maintained as part of the permanent records for the modified aircraft

17.

FAA FoR 8110-2 (10-68)

## Every issue (1)

- May 4, 1994: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/88/4b/884b09be63be7b7df7a865f22f4fb11c26d079ead77672aeae6ffad889689d92)

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