ST01854CH-D
Installation of an Innovative Solutions & Support (IS&S) Air Data Display Unit and Standby Altimeter. Held by Garrett Aviation Services, which holds 185 approved modifications in all. Last revised August 28, 2003. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Gulfstream Aerospace LP; Gulfstream Aerospace LP
- Models
- 1125 Westwind Astra, Astra SPX
- Type certificates
- A16NM, A16NM
- On this site
- Israel Aircraft Industries 1125 36 registered
Israel Aircraft Industries ASTRA SPX 37 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.