Aircraft STC directory

Textron Lycoming AVCO O-540-A1A5 STCs

The Jun 30, 2026 FAA DRS snapshot contains 4 selected supplemental type certificates with status Current whose public applicability data names the Textron Lycoming AVCO O-540-A1A5. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

listed Current at snapshot

holder directories

modification categories

Aug 31, 2023

latest recorded revision

Modification demand surface

Other aircraft modifications3 Fuel systems1

Recorded holders

TALCO Aviation1 Whelen Aerospace Technologies1 Champion Aerospace LLC1 Shadin Avionics1

Recently revised O-540-A1A5 STCs

Showing the 4 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

SE40WEOther aircraft modificationsRevised Aug 31, 2023

Installation of two Roto-Master Turbochargers Model No. 3DT5FF10J2, P/N 600572-00 (formerly Rayjay Model No. 315F10 P/N RJ0080-100, -101, or - 102).

FAA holder: TALCO Aviation

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SE01537ATOther aircraft modificationsRevised Jul 22, 2022

Replace counterweights on Lycoming O-540-A1A5, -A1B5, -A1C5, -A1D5, and IO-540-C1B5 engines.

FAA holder: Whelen Aerospace Technologies

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SE00768CHOther aircraft modificationsRevised Feb 10, 2009

Replace Slick 6000, 6100, 6200 and 6300 series magnetos and TCM/Bendix S6-20, S6-200 and S6-1200 series magnetos with the Champion Limited Authority Spark Advance Regulator (LASARTM) ignition system.

FAA holder: Champion Aerospace LLC

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SE922GLFuel systemsRevised Jun 8, 2006

Installation of a Shadin Company fuel flow transducer.

FAA holder: Shadin Avionics

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