The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · amended

ST01582WI-D

Installation of Aircell High Speed Internet System (AHSI) with Wireless Local Area Network (WLAN) System; Data required: (1) Duncan Aviation Inc., Document List No. 100222037, Rev A, dated May 3, 2010, (2) Duncan Aviation Inc. Document No., 100222035, Rev A, FAA Approved Airplane Flight Manual Supplement, dated May 3, 2010, or later FAA Approved Revisions to (1) or (2). Held by Duncan Aviation INC, which holds 316 approved modifications in all. Last revised November 16, 2010. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Cessna Aircraft Company
Models
750
Type certificate
T00007WI
On this site
Cessna 750 Citation X 287 registered
The FAA's record
On the FAA's site

What an approved modification is

A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.

Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 20, 2026.