# STC SA4-1197

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: AvComp LLC, United States
- Description: Control lock, locking rudder, elevator, and ailerons.
- Applied: July 2, 1960
- Status date: November 8, 2025
- Product: Aircraft, Small Airplane
- Data sheets: [TCDS A-743](https://openairdocs.org/tcds/A-743)
- Certificate PDF: https://openairdocs.org/files/sha256/09/4d/094d21bd11d64c3d9ddaae0c99cdf3dc6885dd45245f12dfc6a918f7c20401cf
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID195749219420260604183306.0001
- DRS record last changed: June 4, 2026
- Page: https://openairdocs.org/stc/SA4-1197

## ADs that name it (0)

None.

## Approved models (2)

- The Boeing Company 75 (Army PT-13) ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- The Boeing Company A75 (Army PT-13A; -13B; -13C) ([TCDS A-743](https://openairdocs.org/tcds/A-743))

## 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.

SA4-1197 AvComp, LLC 15721 Pinehurst Drive, Unit 115 Basehor, KS 66007 Part 4a CAR A-743 Boeing A75 (Army PT-13A, -13B, -13C) Installation of control lock, locking rudder, elevator, and ailerons per Serv-Aero Engineering, Inc., Drawing Number 1072.

1. This approval should not be extended to other specific airplanes of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane.

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.

07/02/1960 11/08/2025 05/27/2026 07/07/1960 for Mr. Jason S. Deutschman Acting Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 2

SA4-1197 05/27/2026 2

## Every issue (3)

- November 8, 2025: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/09/4d/094d21bd11d64c3d9ddaae0c99cdf3dc6885dd45245f12dfc6a918f7c20401cf)
- November 8, 2025: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/6d/41/6d413dcceed9d25a1cb8ee95d6ffae74a3bd3d57151e2e8897a15f991d6a6bf8)
- July 7, 1960: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/62/0e/620efb4d4fb1e2951bd0a58275e8b2590ae64a6b93a5db8702b0d675260d33e7)

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