# STC SA4938NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Methow Aviation Inc, United States
- Description: Installation of a Continental IO-520-D engine and a McCauley D2A34C58/90AT propeller.
- Applied: April 28, 1989
- Status date: August 14, 1990
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 7A12](https://openairdocs.org/tcds/7A12)
- Certificate PDF: https://openairdocs.org/files/sha256/1c/70/1c702d2595123ecf90ae46a6bc40d6292344c6fe1b0f01f7ca5c9c059788cabd
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2C53404596EAAE65862579C20055211D.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4938NM

## ADs that name it (0)

None.

## Approved models (1)

- Aeronautica Macchi S.p.A. AL60 ([TCDS 7A12](https://openairdocs.org/tcds/7A12))

## What the certificate says

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

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA4938MM This certificate issued to: Methow Aviation, INC.

Part 3 of the CiVil Air Regulations:

Original Product -Typelertificate Number: 1A12 Make: Aeronautica Macchi Model: AL-60 Description of Type Design Change: Installation of a Continental 10-520-D engine and McCauley D2A34C58/90AT propeller, in accordance with Methow Aviation, Inc. photograpn:

1-4, dated May 24, 1990, or later FAA Approved Revision.

timitalions and bindilions: Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Aeronautica Macchi Model AL-60 aircraft, Serial Number 6154/9, Registration Number N1709L, only. A copy of this Certificate, Addendum No. SA4938NM, and FAA Approved Flight Manual Supplement, dated August 14, 1990, must be maintained as part of the permanent records for the modified aircraft. (See Continuation Sheet page 3)

Date of Application: April 28, 1989 Date of Issuance: August 14, 1990

FEDERAL AVIATION Lute missued:

By Direction of the Administrator sand gz5mи Manager, Aircraft Modification Branch Seattle Aircraft Certification Office

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) NumbeR SAA938NM Limitations and Conditions: (continued) The Conditions and limitations of Type Certificate Data Sheet (TCDS) Number 7A12 apply except where superseded by the following:

Supplemental Type Certificate Data Sheet, which is part of STC SA4938NM, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Federal Air Regulations.

Supplemental Type Certificate HOLDER: Methow Aviation, Inc.

Model AL-60 (Normal Category) as modified by STC SA4938NM Engine: Continental IO-520-D Fuel: 100 LL or 100 octane rating aviation gasoline Engine Limits: 260 HP 2520 rpm Propeller: McCauley D2A34C58/90AT Propeller Limits: 260 HP 2520 rpm 88 (Max.) to 80 (Min.) diameter.

Propeller Governor: Woodward A210680 47 PAGE 30F 3 PAGES

## Every issue (1)

- August 14, 1990: Issued, Current. [certificate](https://openairdocs.org/files/sha256/1c/70/1c702d2595123ecf90ae46a6bc40d6292344c6fe1b0f01f7ca5c9c059788cabd)

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