ST00578DE
Reduce number of passenger seats installed from 8 to 4 passengers. Held by International Jet Aviation Services. Last revised March 17, 2005. System: cabin, seats and restraints.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Learjet Inc.
- Models
- 25D
- Type certificate
- A10CE
- On this site
- Learjet 25 23 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.