STC SA5581SW

Installation of ALCOR true-flow/ totalizer system. Requires STC SE5583SW which can be installed on aircraft equipped with Teledyne Continental engines IO-360, L/TSIO-360, TSIO-360, TIO-360, TSIO-470, GTSIO-520, L/TSIO-520, TSIO-520, IO-520, and IO-470. The approved model numbers listed may not be inclusive.

Historical Amended Aircraft Single-Engine Rev 09/30/2002 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 (135)

+ 85 more aircraft

Certification basis — 14 CFR

Part 21

Specific sections

Sec. 111
Sec. 113
Sec. 115
Sec. 117
Sec. 119
Sec. 120

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