STC ST01844LA

Installation of TDG Aerospace, Inc. Universal Fault Interrupter (UFI) model 3000 relay for protecting the airplane from electrical faults in fuel pump and pump electrical power feed systems, having potential for introducing ignition sources, in the airplane center wing fuel tank.

Historical Issued Aircraft Large Multi-Engine Rev 12/14/2005 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 (1)

A16WE The Boeing Company · 737-300 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
§ 25.981

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