# STC SA421CE

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Williams Barbara or Bob
- Description: Installation of a Lycoming O-360-A1A or O-360-A1D 180 hp engine or O-360-B1B 168 hp engine and constant speed propeller
- Status date: July 20, 1993
- Data sheets: A-799, A-799
- Certificate PDF: https://openairdocs.org/files/sha256/e2/64/e2649ec6bf24e739f4d05325e2ecf3983580ffb75655da210170f068c2d0a4c8
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/126C722B7369A87E85256CC2000E3A93.0001
- Page: https://openairdocs.org/stc/SA421CE

## ADs that name it

- [AD 82-07-02](https://openairdocs.org/ad/82-07-02): Engine Crankcase Breather · Lycoming O-360-A1A engine and Hartzell HC-C2YK-1B/7666A-2… (Avcon Industries STC SA1324CE or 14 others). Effective Apr 8, 1982. Named in the applicability
- [AD 77-16-01](https://openairdocs.org/ad/77-16-01): Actuating Pins · McCauley Propeller Systems 2A34C, 2A36C1, 2A36C18 and 8 more. Effective Aug 9, 1977
- [AD 69-15-03](https://openairdocs.org/ad/69-15-03): Muffler Assembly · Lycoming O-320-A1A, A1B, A3A, A3B or Lycoming O-320-B1A, B1B… (D'Shannon Products STC SA135CE or 8 others). Effective Aug 20, 1969. Named in the applicability

## Approved models (2)

- The Cessna Aircraft Company 170A (TCDS A-799)
- The Cessna Aircraft Company 170B (TCDS A-799)

## What the certificate says

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

## Every issue (1)

- July 20, 1993: Amended, Current. [certificate](https://openairdocs.org/files/sha256/e2/64/e2649ec6bf24e739f4d05325e2ecf3983580ffb75655da210170f068c2d0a4c8)

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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.