ST01662CH-D
Installation of a Honeywell Mark VIII Enhanced Ground Proximity Warning System, EGPWS with video display of terrain. Held by Standard Aero, which holds 88 approved modifications in all. Last revised December 19, 2013. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.
- Models
- 31, 31A, 35, 35A (C-21A), 36, 36A
- Type certificates
- A10CE, A10CE, A10CE, A10CE, A10CE, A10CE
- On this site
- Learjet 31 119 registered
Learjet 35 161 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 8, 2026.