STC ST01691CH

Installation of a Smiths Industries combined voice and flight data recorder, model 3257A1, and optional Smiths Industries recorder control unit, model 3874C1.

Historical Issued Aircraft Large Multi-Engine Rev 08/29/2002 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 (6)

A3WE The Boeing Company · 727 Series
A3WE The Boeing Company · 727-100 Series
A3WE The Boeing Company · 727-100C Series
A3WE The Boeing Company · 727-200 Series
A3WE The Boeing Company · 727-200F Series
A3WE The Boeing Company · 727C Series

Certification basis — 14 CFR

Part 21

Specific sections

§ 21.111
§ 21.113
§ 21.115
§ 21.117
§ 21.119
§ 21.120

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