FAA · Supplemental Type Certificate
STC SA01717WI
Installation of an Aircell High Speed Internet System (AHSI) with Wireless Local Area Network (WLAN) and Axxess II Iridium Phone System in Cessna 525A airplanes and activation of Wireless Local Area Network on Cessna 525B airplanes.
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)
Specific sections
- Sec. 111
- Sec. 113
- Sec. 115
- Sec. 117
- Sec. 119
- Sec. 120
- § 21.47
- Sec. 23.251
- Sec. 23.301
- Sec. 23.1308
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗