SA01734SE (PG 3)Aircraft structures
Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts.
FAA holder: Andrew D. Humphrey
Aircraft STC directory
Commonwealth Aircraft 185 STCs
The Jun 30, 2026 FAA DRS snapshot contains 3 selected supplemental type certificates with status Current whose public applicability data names the Commonwealth Aircraft 185. 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
3
holder directories
2
modification categories
Oct 14, 2016
latest recorded revision
Modification demand surface
Other aircraft modifications2
Aircraft structures1
Recently revised 185 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
SA01944CH (1 OF 2)Other aircraft modifications
Modify airplane to fly on unleaded automotive gasoline, 87 minimum antiknock index, per ASTM Specification D-439 or D-4818 of any volatility class, A through E, or 82UL AVGAS per ASTM D-6227.
FAA holder: Experimental Aircraft Association Inc.
SA905GLOther aircraft modifications
Superseded by STC SA01944CH. Modify airplane to fly on unleaded automotive gasoline, 87 minimum antiknock index.
FAA holder: EAA Aviation Foundation