Aircraft STC directory

Interstate Engineering & Type Design S-1B1 (Army L-6; XL-6) STCs

The Jun 30, 2026 FAA DRS snapshot contains 3 selected supplemental type certificates with status Current whose public applicability data names the Interstate Engineering & Type Design S-1B1 (Army L-6; XL-6). 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

Oct 31, 2008

latest recorded revision

Modification demand surface

Engine and powerplant2

Other aircraft modifications1

Recorded holders

STOL Aviation LLC c/o Tom Csatari2 Experimental Aircraft Association Inc.1

Recently revised S-1B1 (Army L-6; XL-6) STCs

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

SA622ALEngine and powerplantRevised Oct 31, 2008

Modification of powerplant installation, fuselage (other than weld assembly), wing flaps, and tail wheel installation to conform to the designs of the corresponding installations, assemblies, and components of the Model S-1B2 airplane.

FAA holder: STOL Aviation LLC c/o Tom Csatari

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SA320ALEngine and powerplantRevised Oct 31, 2007

ONE ONLY STC, S/N 195 AND S/N 231: Installation of Lycoming O-320-A2B engine, McCauley 1A175/GM82 propeller, Cleveland 20-6, 6.00 - 6 main wheel and brake assemblies with 8.50 - 6, 6-ply tires, leaf tail spring with Scott Model 3200 tail wheel assembly, squared wing tips, and miscellaneous other design changes to airplanes S/N 195 and S/N 231.

FAA holder: STOL Aviation LLC c/o Tom Csatari

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SA01944CH (1 OF 2)Other aircraft modificationsRevised Mar 5, 2004

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.

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