What it approves
Installation of engine mount P/N M1 for Pratt & Whitney R-985 or R-1340 engine installation.
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.
SA266SW AirCorps Aviation 1259 Exchange Ave. SE Bemidji, MN 56601 Part 4a the Civil Air Regulations A-743 Boeing 75 Series NOTE: This STC is for structural approval of engine mount only and does not include the installation of engines.
The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.
05/08/1963 08/24/1964 10/22/1965 07/27/1976 09/23/1963 for Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 3 Installation of engine mount P/N M1 for Pratt and Whitney R-985 or R-1340 engine installation.
FAA 8110-2 ( 10/24) Page 2 of __
SA266SW 05/27/2025 3
SA266SW 05/27/2025 Dates Reissued:
11/21/2024; 01/28/2025; 05/27/2025
-END- 3 3
ADs that name this STC · 0
An AD can apply because an STC is installed, or mention one in its text.
Approved models · 12
| Make | Model | Data sheet |
|---|---|---|
| The Boeing Company | 75 (Army PT-13) | A-743 |
| The Boeing Company | A75 (Army PT-13A; -13B; -13C) | A-743 |
| The Boeing Company | A75J1 (Army PT-18) | A-743 |
| The Boeing Company | A75L3 | A-743 |
| The Boeing Company | A75L300 | A-743 |
| The Boeing Company | A75N1 (Army PT-17; -17A; Navy N2S-1; -4) | A-743 |
| The Boeing Company | B75 (Navy N2S-5) | A-743 |
| The Boeing Company | B75N1 (Navy N2S-3) | A-743 |
| The Boeing Company | D75N1 (Army PT-27) | A-743 |
| The Boeing Company | E75 (Army PT-13D; Navy N2S-5; PT-13D/N2S-5) | A-743 |
| The Boeing Company | E75N1 (Army PT-13D; Navy N2S-5; PT-13D/N2S-5) | A-743 |
| The Boeing Company | IB75A | A-743 |
Every issue · 2
DRS keeps each issue of an STC as its own record, with its own certificate and attachments.
| Date | Status | Files |
|---|---|---|
| May 27, 2025 | Reissued, current | Certificate |
| July 27, 1976 | Reissued, earlier issue | Certificate |