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

ST00011WI

Installation of Concorde RG380E/40 and 40B battery. Held by Aero-Mach Wilco LLC, which holds 17 approved modifications in all. Last revised September 20, 2022. System: electrical power.

What it applies to

Kind of product
Aircraft
Design holder
Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.
Models
500, 550, S550, 560, 552, 560XL, 501, 551, 650, 750, 525, 525A
Type certificates
A22CE, A22CE, A22CE, A22CE, A22CE, A22CE, A27CE, A27CE, A9NM, T00007WI, A1WI, A1WI
On this site
Cessna 525 CitationJet (CJ series) 1,972 registered
Cessna 560 Citation V, Ultra, Encore and Excel 1,344 registered
Cessna 750 Citation X 287 registered
Cessna S550 94 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 22, 2026.