# STC SA3557NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aircraftsman, United States
- Description: Installation of air-to-air intercooler in engine induction system.
- Status date: December 17, 1986
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7D3B3224738A113E85256CC2000A9937.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3557NM

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company P210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21))

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