STC SA5994NM-D

: Install fireproof blankets on the engine fan-reverser intermediate seal core area replacing the fireproof insulating coating (MA255) in accordance with United Air Lines, DAS-1-WE, Approved Drawing List No. 5994 dated August 30, 1994, or later FAA approved revisions.

Current Reissued Aircraft Large Multi-Engine Rev 11/30/2011 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 (2)

A1NM The Boeing Company · 767
A1NM The Boeing Company · 767-200 Series

Certification basis — 14 CFR

Part 21
Part 25

Specific sections

§ 21.47
§ 21.111
§ 21.113
§ 21.115
§ 21.117
§ 21.119
§ 21.120
§ 25.1191

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