# STC SA821NW

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Bombard Charles A, United States
- Description: Installation of a Lycoming IO-320-C1A engine, a Hartzell HC-82XL-1D/7636D-4 propeller, and associated systems
- Applied: January 11, 1979
- Status date: March 14, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A17](https://openairdocs.org/tcds/3A17)
- Certificate PDF: https://openairdocs.org/files/sha256/c3/5a/c35abaf60531292eae776e461e309d606c4feeeb369b40e83998df0c1f040646
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/73A786C9E74B197D86257A3E006AFFD5.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA821NW

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 175B ([TCDS 3A17](https://openairdocs.org/tcds/3A17))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

rited States of Emerin Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA82INw This certificate issued to: Charles Bombard Purt 3 of the Civil Air Regulations.

Original Product - Typesertificate Number: ЗА 17 Make: Cessna Model: 175B Description of Type Design Change:

Installation of a Lycoming I0-320-C1A engine, a Hartzell HC-82XL-1D/7636D-4 propeller, and associated systems in accordance with Charles Bombard photographs 1 through 5.

Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Cessna 1758, Serial Number 175-56887 only. A copy of this Certificate and Addendum Number SA82INW shall be maintained as part of the permanent records for the modified aircraft.

Date of Application: January 11, 1979 Date Reissued:

Date sf ismance: August 13, 1979 Laiamended: March 14, 1934 FEDERAL RITATION By Direction of the Administrator (Signature ) TOMINISTRATD Manager, Seattle Aircraft Certification Offi (Title) 45 FAA FORM 2110-2 (10-60)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) March 14, 1984 Number: SA821NW Supplemental Type Certificate ADDENDUM NO. SA821NW The conditions and limitations of Type Certificate Data Sheet 3A17 apply except where superseded by the following:

Supplemental Type Certificate Data Sheet, which is part of STC SA82INW, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Civil Air Regulations.

CESSNA 175B (LANDPLANE - NORMAL CATEGORY) AS MODIFIED BY STC SA82 INW Engine: Lycoming I0-320-CIA Engine Limits: 160 Hp @ 2700 RPM (For 1 Min.)

2500 RPM and 25" Hg. thereafter Temperature Limits: Cylinder Head - 500°F Oil Inlet - 245°F Propeller: Hartzell HC-82XL-ID/7636D-4 Propeller Limits: 225 Hp @ 3000 RPM Diameter: 72" maximum; 70" minimum Placards: None

- END -

**FAA FORM B110-2-1 (10-69) PAGE 3 OF 3 PAGES**

## Every issue (1)

- March 14, 1984: Amended, Current. [certificate](https://openairdocs.org/files/sha256/c3/5a/c35abaf60531292eae776e461e309d606c4feeeb369b40e83998df0c1f040646)

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