STC SA421CE

Supplemental type certificate · Williams Barbara or Bob

Holder
Williams Barbara or Bob · United States
Status
Current · Amended
Status date
July 20, 1993
Applied
January 28, 1966
Product
Aircraft · Single-Engine
Certification basis
Part 21
Data sheet
TCDSA-799

From FAA DRS, with our copy of the certificate PDF. DRS record last changed December 6, 2025.

What it approves

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

What the certificate says

From the PDF’s text layer, without the form’s printed wording. Layout and order may differ; the PDF is the record.

This certificate is a scan without a text layerOpen the PDF to read it.

ADs that name this STC · 3

An AD can apply because an STC is installed, or mention one in its text.

Approved models · 2

MakeModelData sheet
The Cessna Aircraft Company170AA-799
The Cessna Aircraft Company170BA-799