FAA · Supplemental Type Certificate
STC ST02409LA
Removal of optional second Auxiliary Power Unit (APU) fire extinguisher system from 757-200 Series aircraft in accordance with FAA Approved Master Drawing List B57-26-002, Revision C, dated December 16, 2011, or later FAA approved revisions, and Instructions for Continued Airworthiness Report 11-126 Revision A, dated December 15, 2011, or later FAA accepted revisions.
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 (1)
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗