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Aircraft STC directory

New Piper Aircraft PA-18-"135" (Army L-21B) STCs

The Jun 30, 2026 FAA DRS snapshot contains 12 selected supplemental type certificates with status Current whose public applicability data names the New Piper Aircraft PA-18-"135" (Army L-21B). Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

12
listed Current at snapshot
10
holder directories
4
modification categories
Apr 4, 2024
latest recorded revision

Modification demand surface

Other aircraft modifications7
Engine and powerplant3
Aircraft structures1
Landing gear and brakes1

Recorded holders

Dakota Cub Aircraft, Inc.1Outpost X Aviation Inc.1Aero-Mach Wilco LLC1Baumann Floats LLC1Airframes Alaska LLC1Wipaire Inc1Airwolf Filter Corporation1Airglas Inc.1McCauley Propeller Systems1Skybound Manufacturing Inc.1

Recently revised PA-18-"135" (Army L-21B) STCs

Showing the 12 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.