ST04023AT-D
Installation of an APU Access Door Modification. Held by Gulfstream Aerospace Corporation, which holds 1,861 approved modifications in all. Last revised March 31, 2015. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Gulfstream Aerospace LP; Gulfstream Aerospace LP; Gulfstream Aerospace LP
- Models
- G280, Galaxy, Gulfstream 200
- Type certificates
- A61NM, A53NM, A53NM
- On this site
- Gulfstream GULFSTREAM 200 5 registered
Israel Aircraft Industries GALAXY 19 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.