# STC SA7412SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Honeywell International Inc., United States
- Description: Remanufacture of AiResearch Precooler Assembly, P/N 184380-1, by replacing core assembly
- Applied: February 19, 1988
- Status date: September 10, 2021
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/8b/80/8b80963f7ca6e0a19233084699ddf46c09307d9e700c740c26f2a4cd6ca3ef7d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/62B8E8DF1CCEA1D786258758004272BF.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA7412SW

## ADs that name it (0)

None.

## Approved models (1)

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

## 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.

SA7412SW Honeywell International Inc.

1944 E Sky Harbor Circle N Phoenix, AZ 85034 Part 4b the Civil Air Regulations A3WE Boeing 727-200 Remanufacture of AiResearch Precooler Assembly, P/N 184380-1, by replacing core assembly in accordance with LORI Drawing #85LB2078, Revision B, dated February 19, 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.

February 19, 1988 10/1/96; 11/15/05; 11/14/12; 9/10/21 April 20, 1988 October 1, 1996 Rev. 1 William S. Shealy ODA Administrator, ODA-602216-NM 2

SA7412SW 2

## Every issue (3)

- September 10, 2021: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/8b/80/8b80963f7ca6e0a19233084699ddf46c09307d9e700c740c26f2a4cd6ca3ef7d)
- November 14, 2012: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/fa/62/fa624888f863b33c5b082edbda5c742c6861600b2393994126be04511ebe9408)
- November 15, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/f4/9a/f49a35077e9d09f4588729cc889d1f164d0e1f962013661a08ee741bd4a93fe7)

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