# STC SA221SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Eric J. Barnhill, United States
- Description: To remove right door for hauling sky divers, picture making and etc.
- Applied: July 17, 1962
- Status date: January 2, 2013
- Product: Aircraft, Small Airplane
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS 3A17](https://openairdocs.org/tcds/3A17)
- Certificate PDF: https://openairdocs.org/files/sha256/36/c7/36c756e80828dd8ecabc1eba04fb028f9d786e953849fb82399069d80997c553
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CB1E8B59D81775BA86257BE2006926CB.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA221SO

## ADs that name it (0)

None.

## Approved models (1)

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

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

United States of America Department of Transportation -- Federal Aviation Administration Supplemental Type Certificate Number SA221SO This certificate issued to

Part 25 of the Federal Aviation Regulations.

Original Product--Type Certificate Number

Description of Type Design Change: To remove right door for hauling sky divers, picture making and etc.

This approval of this change in type design applies basically to the standard Cessna Model 175 aircraft only. This approval should not be extended to other aircraft of the same model on which other approved modifications have been made unless it has first been determined that the interrelationships between these various modifications will have no adverse effect on the airworthiness of the aircraft.

(Continued on Page 3)

Eric J. Barnhill 512 Waco Way Seneca, S.C. 29678 3A17 Make : Cessna Model : 175

Date reissued : January 2, 2013 Date amended :

(Signature) Melvin D. Taylor Manager, Atlanta Aircraft Certification Office

(Title)

Date of application: July 17, 1962

Date of issuance: August 9, 1962

Transfer the ownership of Supplemental Type Certificate Number

to (Name of transferee)

(Address of transferee) (Num ber and Street)

(City, State, and ZIP code)

from (Name of grantor) (Print or type)

(Address of grantor) (Number and Street)

(City, State, and ZIP code)

Signature of grantor (In ink):

Number SA221SO

The following operating limitations apply when the aircraft is operated with the cabin door removed. These shall appear on a placard on the instrument panel placed in full view of the pilot.

1. Only the right-hand door is to be removed with its corresponding seat and control column.

2. Seats and safety belts must be provided for all occupants and the pilot.

3. All loose objects in the cabin must be properly secured.

4. Jumper static lines must be kept free of the pilot’s controls and control surfaces.

5. No smoking permitted.

6. AIR SPEED LIMITATION VNE never exceed – 140 mph CAS

-------------------------------------------- END ---------------------------------------------------

## Every issue (1)

- January 2, 2013: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/36/c7/36c756e80828dd8ecabc1eba04fb028f9d786e953849fb82399069d80997c553)

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