STC SA4-363
FAA DRS lists SA4-363 as Current · Amended, held by Brittain Industries, Inc, for Sierra Hotel Aero Navion (Army L-17A), Sierra Hotel Aero Navion A (Army L-17B and L-17C), and Sierra Hotel Aero Navion B, and 4 more aircraft configurations. Recorded change: Installed Brittain/Clarkson Autopilot. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
SA4-363 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: Sierra Hotel Aero Navion (Army L-17A), Sierra Hotel Aero Navion A (Army L-17B and L-17C), and Sierra Hotel Aero Navion B, and 4 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Buyer checks
Confirm before sourcing
Related avionics STCs
Installation of IS&S Air Data System. Data required: (1) Columbia Avionics, Inc. Master Document List No. 30141324, Revision 3, dated January 21, 2004; and (2) FAA Approved Flight Manual Supplement 30141339, dated January 28, 2004, or later FAA Approved Revisions to (1) or (2).
FAA holder: Blackhawk Aerospace Technologies Inc.
Reduced Vertical Separation Minimum (RVSM) group airworthiness approval of Cessna Model S550 and 560 Citation Aircraft in accordance with Columbia Avionics, Inc. Master Document List RVSM Group Approval Cessna S550/560, Document No. 30141243, Rev. 3, dated June 4, 2004, or later FAA approved revision.
FAA holder: Blackhawk Aerospace Technologies Inc.
Installation of a Honeywell MK-VIII EGPWS system. Data required: (1) Columbia Avionics, Inc. Master Document List No. 30141108, Revision 2, dated February 21, 2005; and (2) FAA Approved Flight Manual Supplement 30141123, dated February 25, 2005, or later FAA Approved Revisions to (1) or (2).
FAA holder: Blackhawk Aerospace Technologies Inc.
Installation of Universal Avionics EFI-890R Flat Panel EFIS System .
FAA holder: Blackhawk Aerospace Technologies Inc.