Aircraft STC directory

Textron Lycoming AVCO O-540-B4B5 STCs

The Jun 30, 2026 FAA DRS snapshot contains 3 selected supplemental type certificates with status Current whose public applicability data names the Textron Lycoming AVCO O-540-B4B5. 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

Feb 10, 2009

latest recorded revision

Modification demand surface

Fuel systems2 Other aircraft modifications1

Recorded holders

Champion Aerospace LLC1 Shadin Avionics1 EAA Aviation Foundation1

Recently revised O-540-B4B5 STCs

Showing the 3 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

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

View record

SE922GLFuel systemsRevised Jun 8, 2006

Installation of a Shadin Company fuel flow transducer.

FAA holder: Shadin Avionics

View record

SE956GLFuel systemsRevised Mar 5, 2004

Superseded by STC SE01943CH. Add approved fuel: unleaded automotive gasoline, 87 minimum antiknock index.

FAA holder: EAA Aviation Foundation

View record