Aircraft STC directory

Consolidated Vultee Aircraft Stinson Division SM-8A STCs

The Jun 30, 2026 FAA DRS snapshot contains 3 selected supplemental type certificates with status Current whose public applicability data names the Consolidated Vultee Aircraft Stinson Division SM-8A. 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

Apr 26, 2018

latest recorded revision

Modification demand surface

Engine and powerplant2 Aircraft structures1

Recorded holders

Andrew D. Humphrey1 M-20 Oil Separators LLC1

Recently revised SM-8A STCs

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

SA6070NMEngine and powerplantRevised Apr 26, 2018

Installation of a 'quick-disconnect drain plug' on the engine rocker sump for the oil drain retrieval system after engine shutdown.

FAA holder: West Coast Air Creations

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SA01734SE (PG 3)Aircraft structuresRevised Oct 14, 2016

Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts.

FAA holder: Andrew D. Humphrey

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SA02033AT (PAGE 5)Engine and powerplantRevised Jul 24, 2008

Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line (47J series w stc's SH4-235SW, SH4-826SW or SH479SW).

FAA holder: M-20 Oil Separators LLC

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