STC ST01299WI-D

Installation of Dual Collins ALI-80A Altimeters and a single Revue Thommen 2-inch Standby Altimeter on Hawker Siddeley HS.125 Series 700 A/B. Data Required: (1) Midcoast Master Data List 23-334G008, Revision B, dated December 29, 2004; (2) FAA Approved Midcoast Airplane Flight Manual Supplement Report Number 23-334M006, Revision NC, dated December 29, 2004, or later FAA Approved Revisions to (1) or (2).

Current Issued Aircraft Large Multi-Engine Rev 12/29/2004 View PDF on drs.faa.gov ↗

What is an STC?

A Supplemental Type Certificate authorizes a major modification or alteration to an FAA-certificated aircraft. STCs are how operators legally install new avionics, change fuel systems, add floats, swap engines, etc. — every change beyond a minor modification needs one.

Applicable aircraft (2)

Certification basis — 14 CFR

Specific sections

Sec. 111
Sec. 113
Sec. 115
Sec. 117
Sec. 119
Sec. 120
§ 21.47

The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗