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Other aircraft modifications

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.

FAA-listed holder
Whelen Aerospace Technologies
Aircraft configurations
5
FAA revision date
FAA status
Current · Reissued

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.

Textron Lycoming AVCO IO-540-C1B51E4Textron Lycoming AVCO O-540-A1D5E-295Textron Lycoming AVCO O-540-A1B5E-295Textron Lycoming AVCO O-540-A1A5E-295Textron Lycoming AVCO O-540-A1C5E-295

Buyer checks

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