# STC SA3781NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Western Skyways Aircraft Modifications Inc., United States
- Description: Installation of engine induction air intercooler.
- Applied: February 1, 1988
- Status date: September 18, 2026
- Product: Aircraft, Small Airplane
- Certification basis: Part 23
- Data sheets: [TCDS A16CE](https://openairdocs.org/tcds/A16CE)
- Certificate PDF: https://openairdocs.org/files/sha256/d3/98/d39896ecf318e126e60edcc3de48d5f52fbcd4c8e400d529cf017a0653a076a8
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID154681176420261023145256.0001
- DRS record last changed: October 23, 2026
- Page: https://openairdocs.org/stc/SA3781NM

## ADs that name it (0)

None.

## Approved models (1)

- Textron Aviation Inc. T207A ([TCDS A16CE](https://openairdocs.org/tcds/A16CE))

## 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.

SA3781NM Western Skyways Aircraft Modifications Inc.

58784 Spring Creek Road Montrose, CO 81403 Part 23 the Federal Aviation Effective February 1, 1965 A16CE Textron Aviation Inc.

1. The approval of this change in type design requires installation STC SE3782NM and is restricted to Textron T207A aircraft equipped with factory installed turbochargers.

2. 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.

(Continued on page 3) 2/1/1988 9/6/1996 5/28/2002 8/27/2002 4/15/1988 ✔ for Jason S. Deutschman Acting Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 3 Installation of engine induction air intercooler per Riley International Corporation Master Drawing List (MDL) R17801, Revision N/C, dated February 19, 1988, or later FAA approved revision. For T207A, S/N 20700483 thru 20700788, Riley International Corp. Pilots Operating Handbook (POH) and FAA approved Airplane Flight Manual Supplement No. 1, dated April 13, 1988, or later FAA approved revisions is required.

Regulations.

T207A

SA3781NM 09/18/26 3

SA3781NM 09/18/26 Date Reissued (continued): 05/20/2019; 03/08/2023; 09/18/2026

3. This approval should not be extended to other aircraft of this model on which other previously approves modifications are incorporated unless it is determined by the installer that the interrelationship between this and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft.

----------------------------------------------------------End----------------------------------------------------- 3 3 Add Page

## Every issue (3)

- September 18, 2026: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/d3/98/d39896ecf318e126e60edcc3de48d5f52fbcd4c8e400d529cf017a0653a076a8)
- March 8, 2023: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/2b/9c/2b9c12a1ebd54b36fb61b53564037e8a379b515118b8cce31a84c8163eab13ee)
- May 20, 2019: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/1d/b3/1db3702d396752780301397b67dd1c295b2f87ffecedc9b0d87269bdde626bdd)

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