ST01056WI
Installation of the Honeywell Enhanced Ground Proximity Warning System (EGPWS) in the Learjet Model 31A airplane. Data Required: (1) JetCorp STC Drawing List No. 63-327L001, revision A, dated February 18, 2002; (2) FAA Approved Airplane Flight Manual Supplement, JetCorp Document No. 63-327B002, revision IR, dated February 20, 2002; or later FAA Approved revisions to (1) or (2). Held by Jetcorp, which holds 38 approved modifications in all. Last revised February 20, 2002. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Learjet Inc.
- Models
- 31A
- Type certificate
- A10CE
- On this site
- Learjet 31 119 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.