ST00222BO
Installation of Enhanced Surveillance modification to Dual Collins TDR-94/94D Transponder System. Held by Learjet INC., which holds 376 approved modifications in all. Last revised December 19, 2006. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Bombardier Aerospace Inc; Bombardier Aerospace Inc
- Models
- CL-600-2B16 (CL-601-3A), CL-600-2B16 (CL-601-3R)
- Type certificates
- A21EA, A21EA
- On this site
- Bombardier CL-600 Challenger and CRJ 1,655 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 21, 2026.