# STC SA3937SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: American Airlines Inc, United States
- Description: ECO H3082, dated 3/25/87, creates American Airlines P/N ABB4321 Central air data computer (CADC), and authorizes its use in the#2 CADC position on 727-223 aircraft, ABB4321 is made from, and is interchangeable with the Honeywell P/N HG18OU-757 CADC IN TH IS APPLICATION. (727-223)
- Status date: April 27, 1987
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7FF75DB3841BFCD185256CC2000C5BC9.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3937SW-D

## ADs that name it (0)

None.

## Approved models (1)

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

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