# STC SA7379SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Honeywell International Inc., United States
- Description: Remanufacture of Hamilton Standard ECU heat exchanger P/N 733949.
- Applied: January 21, 1988
- Status date: September 10, 2021
- Product: Aircraft, Large Airplane
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A23WE](https://openairdocs.org/tcds/A23WE)
- Certificate PDF: https://openairdocs.org/files/sha256/eb/2d/eb2d392eac0b12167aa7cb18eb590894804810ed07b084815f8b11d3f6455d37
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1EFE770E60E6749A862587580041A6EC.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA7379SW

## ADs that name it (0)

None.

## Approved models (1)

- Lockheed Aircraft Corporation L-1011 Series ([TCDS A23WE](https://openairdocs.org/tcds/A23WE))

## 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.

SA7379SW Honeywell International Inc.

1944 E Sky Harbor Circle N Phoenix, AZ 85034 Part 25 the Federal Aviation Regulations A23WE Lockheed L-1011 Remanufacture of Hamilton Standard ECU heat exchanger Part No. 733949 in accordance with LORI Drawing 85LB2076, Rev. D, dated March 2, 1988, or later FAA approved revision.

1) Compatibility of this modification with previously installed equipment must be determined by installer.

2) 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.

January 21, 1988 10/01/96; 11/15/05; 11/14/12; 9/10/21 March 3, 1988 October 1, 1996 Rev. 1 William S. Shealy ODA Administrator, ODA-602216-NM 2

SA7379SW 2

## Every issue (3)

- September 10, 2021: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/eb/2d/eb2d392eac0b12167aa7cb18eb590894804810ed07b084815f8b11d3f6455d37)
- November 14, 2012: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/30/0c/300c5fc03c01b470f9f93924c9db3cdf897c6b4853ce10573c8aa4e6a8cd0879)
- November 15, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/59/b8/59b85bd1779b3bf8a8f2457f969cf0843828cc3901c19c451a46df87f8a89c8b)

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From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.