# STC SA02445AK

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Rust's Flying Service, United States
- Description: Installation of Aerox MSK-A Passenger Oxygen Mask, part number 4110-702
- Applied: April 16, 2015
- Status date: May 15, 2015
- Product: Aircraft, Small Airplane
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS A20SO](https://openairdocs.org/tcds/A20SO)
- Certificate PDF: https://openairdocs.org/files/sha256/69/ba/69baba93d05ec6cbb3fbe6cf4fe36d0c4de763538fbb8d44f7a78a76d1bdd9da
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E6F72DABA0688E7486257E5F004D40A1.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA02445AK

## ADs that name it (0)

None.

## Approved models (1)

- Piper Aircraft Inc. PA-31-350 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))

## 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.

This Certificate issued to Rust’s Flying Service 4525 Enstrom Circle Anchorage, Alaska 99502

Part 3 of the Civil Air Regulations.

Original Product – Type Certificate Number: A20SO Make: Piper Aircraft, Inc.

Model: PA-31-350

Installation of Aerox MSK-A Passenger Oxygen Mask, part number 4110-702, in accordance with Rust’s Flying Service Installation Document RFS-001, Revision N/C, dated May 10, 2015 or later FAA approved revision.

Limitations and Conditions

1) If the holder agrees to permit another person to use this Certificate to alter the product, the holder shall give the other person written evidence of that permission.

2) Compatibility of this modification with other FAA approved modifications must be evaluated by the installer.

3) Aircraft Flight Manual Supplement “Piper Model PA-31-350 Equipped with Aerox MSK-A Disposable Passenger Oxygen Mask”, Document Number RFS-234, Revision IR, dated May 15, 2015, or later FAA approved revision is a required part of this installation.

4) This approval is limited to the Aerox MSK-A Passenger Oxygen Mask, part number 4110-702, only.

5) The Aerox MSK-A Passenger Oxygen Mask, part number 4110-702, installed in this approval is for a single use only and is to be replaced after a single use.

(Signature) August A. Asay Manager, Anchorage Aircraft Certification Office

(Title)

Date of application: April 16, 2015 Date of issuance: May 15, 2015

FAA Form 8110-2-1(10-69) Page 2 of 2

## Every issue (1)

- May 15, 2015: Issued, Current. [certificate](https://openairdocs.org/files/sha256/69/ba/69baba93d05ec6cbb3fbe6cf4fe36d0c4de763538fbb8d44f7a78a76d1bdd9da)

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