# STC SA450NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Nelson Harold G, United States
- Description: Installation of safety valve (Cessna P/N C482002-0101), adapter bracket, placard, and supercharger actuator guard
- Applied: May 7, 1977
- Status date: October 5, 1977
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 2A3](https://openairdocs.org/tcds/2A3)
- Certificate PDF: https://openairdocs.org/files/sha256/e3/25/e3250d88bb75f5888cf59472ce22b4b49bd20fb940e2a0f9b2a279a9136e2c6c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8172E093A556525D86257A47005DB347.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA450NW

## ADs that name it (0)

None.

## Approved models (1)

- Mooney Aviation Company Inc M20C ([TCDS 2A3](https://openairdocs.org/tcds/2A3))

## What the certificate says

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

## Every issue (1)

- October 5, 1977: Issued, Current. [certificate](https://openairdocs.org/files/sha256/e3/25/e3250d88bb75f5888cf59472ce22b4b49bd20fb940e2a0f9b2a279a9136e2c6c)

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