STC SE01537AT
FAA DRS lists SE01537AT as Current · Reissued, held by Whelen Aerospace Technologies, for Textron Lycoming AVCO IO-540-C1B5, Textron Lycoming AVCO O-540-A1D5, and Textron Lycoming AVCO O-540-A1B5, and 2 more aircraft configurations. Recorded change: Replace counterweights on Lycoming O-540-A1A5, -A1B5, -A1C5, -A1D5, and IO-540-C1B5 engines. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
SE01537AT identifies the approval, recorded holder, named aircraft, and modification scope. It does not confirm kit availability, serial-number effectivity, data rights, price, or installation authority.
Applicability
Aircraft named in FAA DRS
Named aircraft: Textron Lycoming AVCO IO-540-C1B5, Textron Lycoming AVCO O-540-A1D5, and Textron Lycoming AVCO O-540-A1B5, and 2 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Related other aircraft modifications STCs
Surrendered and incorporated into STC ST334CH.
FAA holder: Cooper Aviation Supply Company, Inc.
Surrendered and incorporated into STC ST334CH.
FAA holder: Cooper Aviation Supply Company, Inc.
Surrendered and incorporated into STC ST334CH.
FAA holder: Cooper Aviation Supply Company, Inc.
Surrendered and incorporated into STC ST334CH.
FAA holder: Cooper Aviation Supply Company, Inc.
FAA record reference
- STC number
- SE01537AT
- Product
- Engine
- Country
- United States
- Application date
- May 3, 1996
- Revision date
- July 22, 2022
- CFR references
- Part 21