STC SH1539NM

Installation of an air-conditioning system in accordance with FAA approved Drawing List DL-365, Revision N, dated December 1, 1988, including Keith Products, Inc. DCN's No.s 1388, 1389, 1391, 1393, 1396, 1397, 1400, 1401, 1402, 1403, 1405, 1406, 1407, and 1408, all dated August 28, 1991, or subsequent FAA approved revision.

Historical Reissued Aircraft Rotorcraft Rev 08/16/2010 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 ↗