# STC SA8840SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Honeywell International Inc.
- Description: Replace core assembly of AiResearch Primary/Secondary Air-to-Air Heat Exchanger, part number 194546-3
- Status date: September 22, 2021
- Data sheets: A31SO, A31SO, A31SO
- Certificate PDF: https://openairdocs.org/files/sha256/d0/ec/d0ec047cec92e4ce3876ad367e4f324b33cb9f99fc4ce1152ed05951998bde49
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D2AFC3E665EC19AF86258767005CA3C4.0001
- Page: https://openairdocs.org/stc/SA8840SW

## ADs that name it

None.

## Approved models (3)

- Embraer - Empresa Brasileira de Aeronautica S.A. EMB-120 (TCDS A31SO)
- Embraer - Empresa Brasileira de Aeronautica S.A. EMB-120ER (TCDS A31SO)
- Embraer - Empresa Brasileira de Aeronautica S.A. EMB-120RT (TCDS A31SO)

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (3)

- September 22, 2021: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/d0/ec/d0ec047cec92e4ce3876ad367e4f324b33cb9f99fc4ce1152ed05951998bde49)
- November 14, 2012: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/a2/a3/a2a3efea847f727b0312153024dd0d2747cc15012d196c969ff66be01831cb31)
- November 15, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/3a/48/3a4816897c1081bde73d04d085a48ba93ba0d903b3cd4499d8b55a0a6d4ef306)

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