Aircraft STC directory

Pratt & Whitney Division Wasp Jr. Series STCs

The Jun 30, 2026 FAA DRS snapshot contains 3 selected supplemental type certificates with status Current whose public applicability data names the Pratt & Whitney Division Wasp Jr. Series. 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

Nov 8, 2025

latest recorded revision

Modification demand surface

Other aircraft modifications2 Engine and powerplant1

Recorded holders

AvComp LLC1 Continental Motors, Inc.1

Recently revised Wasp Jr. Series STCs

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

SE27WEOther aircraft modificationsRevised Nov 8, 2025

Installation of two Bendix-Stromberg Model PS-5C carburetors.

FAA holder: AvComp LLC

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SE31WEEngine and powerplantRevised Oct 31, 2016

Installation of Electro-Coatings, Inc. piston rings P/N 251822, 251824, and 251825 on Pratt and Whitney R-985 piston P/N 27056 for use with Channelcromium plated R-985 engine cylinders.

FAA holder: Continental Motors, Inc.

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SE4-864Other aircraft modificationsRevised Dec 28, 2001

Increase in impeller drive ratio from 10:1 to 12:1.

FAA holder: Covington Aircraft Engines, Inc.

View record