STC ST01708LA

Installation of MASS Systems fire extinguisher, P/N M57331-009, as a replacement for the Graviner fire extinguisher, P/N 57331-009 in the above-noted airplane model. This fire extinguisher is in accordance with MASS Systems Drawing No. M57331-009, Fire Extinguisher, 52 cu-in , Revision B, dated November 19, 2004, or later FAA approved revisions.

Current Reissued Aircraft Large Multi-Engine Rev 07/05/2011 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 (4)

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 ↗