STC ST00223MC

FAA DRS lists ST00223MC as Current · Issued, held by Duncan Aviation Inc., for Learjet 35A (C-21A). Recorded change: Cockpit Cooling System Modification. Snapshot dated June 30, 2026.

FAA-listed holder

Duncan Aviation Inc.

Aircraft configurations

FAA revision date

August 28, 2023

FAA status

Current · Issued

Recorded modification

What the FAA record covers

ST00223MC identifies the approval, recorded holder, named aircraft, and modification scope. It does not confirm kit availability, serial-number effectivity, data rights, price, or installation authority.

Applicability

Aircraft named in FAA DRS

Named aircraft: Learjet 35A (C-21A). Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Learjet 35A (C-21A)A10CE

Buyer checks

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ST03922ATOther aircraft modificationsRevised Jun 23, 2011

Installation of Thales vertical speed / resolution advisory indicator (VSI/RA) in accordance with United Parcel Service Company Master Drawing List (MDL) No. AER10-3440-0013, Rev. A, Dated June 14, 2011, or later FAA approved revision.

FAA holder: United Parcel Service Company

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ST01290AT-DOther aircraft modificationsRevised Jun 20, 2011

Installation and operation of a Shaw Aero Devices toilet rinse/fill check valve.

FAA holder: Parker Hannifin - Fluid Systems Division

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SA2872WEOther aircraft modificationsRevised Jun 19, 2011

Installation of right and left hand cockpit side windows in accordance with FAA sealed Beryl D Shannon Aviation Specialties, Inc. Drawing List DLB-1301.

FAA holder: D'Shannon Products Ltd.

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SA02356LAOther aircraft modificationsRevised Jun 17, 2011

Installation of Inflight Warning Systems Fan Vibration Monitor Unit, in accordance with FAA approved Inflight Warning Systems Master Data List (MDL) Drawing No. 13601, Rev. A, dated May 31, 2011, or later FAA approved revision.

FAA holder: Inflight Warning Systems Inc.

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What the FAA record covers

Aircraft named in FAA DRS

Confirm before sourcing

Related other aircraft modifications STCs

Installation of Thales vertical speed / resolution advisory indicator (VSI/RA) in accordance with United Parcel Service Company Master Drawing List (MDL) No. AER10-3440-0013, Rev. A, Dated June 14, 2011, or later FAA approved revision.

Installation and operation of a Shaw Aero Devices toilet rinse/fill check valve.

Installation of right and left hand cockpit side windows in accordance with FAA sealed Beryl D Shannon Aviation Specialties, Inc. Drawing List DLB-1301.

Installation of Inflight Warning Systems Fan Vibration Monitor Unit, in accordance with FAA approved Inflight Warning Systems Master Data List (MDL) Drawing No. 13601, Rev. A, dated May 31, 2011, or later FAA approved revision.