Aircraft STC directory

Beechcraft DH.125 Series 1A/R-522 STCs

The Jun 30, 2026 FAA DRS snapshot contains 5 selected supplemental type certificates with status Current whose public applicability data names the Beechcraft DH.125 Series 1A/R-522. 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 16, 2017

latest recorded revision

Modification demand surface

Electrical systems2 Other aircraft modifications2 Aircraft structures1

Recorded holders

Aviall Services, Inc.2 Lee Aerospace Inc.1 Concorde Battery Corporation1 Securaplane Technologies1

Recently revised DH.125 Series 1A/R-522 STCs

Showing the 5 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

ST01228WIAircraft structuresRevised Oct 16, 2017

Replacement of OEM window pane assemblies with Lee Aerospace laminated window assembly and termination of OEM dry air system.

FAA holder: Lee Aerospace, Inc.

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ST00415LAElectrical systemsRevised Apr 18, 2014

Installation of Concorde Battery Model RG-390E.

FAA holder: Concorde Battery Corporation

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ST01809LAElectrical systemsRevised Mar 31, 2014

Installation of Hawker PN 9750W0640 Sealed Lead Acid Battery.

FAA holder: Securaplane Technologies

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SA1185SOOther aircraft modificationsRevised Oct 31, 2002

Replace existing batteries with 2371, 2376 or 23491 nickel-cadmium batteries.

FAA holder: Aviall Services, Inc.

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ST1003SOOther aircraft modificationsRevised Oct 31, 2002

Replace existing lead-acid batteries with Gill BB638/T1-E lead acid batteries, part numbers BSI 200 left and BSI 200 right.

FAA holder: Aviall Services, Inc.

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