SE8193SWOther aircraft modifications
Grind nitriden high compression cylinder barrles to plus .010 oversize and install SL75089 P10 piston, SL74242 P10 compression ring, and SL73857 P10 oil ring.
FAA holder: Superior Air Parts Inc.
Aircraft STC directory
Textron Lycoming AVCO IO-540-C4D5D 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 IO-540-C4D5D. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
3
listed Current at snapshot
1
holder directories
2
modification categories
Jul 31, 2008
latest recorded revision
Modification demand surface
Other aircraft modifications2
Fuel systems1
Recorded holders
Recently revised IO-540-C4D5D STCs
Showing the 3 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SE01930NY (2 OF 2)Other aircraft modifications
Installation of Casper Labs 90 degree oil filter housing adapter.
FAA holder: Casper Labs Inc