ST01059WI
Installation of Honeywell MK VII Enhanced Ground Proximity Warning System (EGPWS). Models must be modified by STC SA2326SW. Held by Duncan Aviation, INC, which holds 158 approved modifications in all. Last revised March 5, 2002. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Lockheed Aircraft Corporation; Lockheed Aircraft Corporation; Lockheed Aircraft Corporation; Lockheed Aircraft Corporation
- Models
- 1329-23D, 1329-23E, 1329-23A, 1329-25
- Type certificates
- 2A15, 2A15, 2A15, 2A15
- On this site
- Lockheed 1329 6 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.