# STC SA3996NM

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: ITT Aerospace Controls, United States
- Description: Installation of ITT Aerospace Controls part number 1163P18-5 pressure switch.
- Applied: January 21, 1988
- Status date: June 27, 1989
- 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/82056AC2DBD37AA586256E7500555BFB.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3996NM

## 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))

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