ST01125LA
Modification of AlliedSignal CTCP36-150W auxiliary power unit (APU) which extends APU operating envelope from 30,000 feet to 37,000 feet. Approval of this change applies to the Hawker 800XP with STC ST00459NY installed with the AlliedSignal GTCP36-150W APU. Held by Lockheed Martin Management & Data Systems, which holds 4 approved modifications in all. Last revised January 24, 2001. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Raytheon Aircraft Company
- Models
- Hawker 800XP
- Type certificate
- A3EU
- On this site
- Raytheon Aircraft Company HAWKER 800 251 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.