ST01231WI
Upgrade of dual Collins ADS-80 Air Data System for RVSM Capability. Data required: (1) Duncan Aviation Document List 031103026, Revision A, dated March 3, 2004; and (2) FAA Approved Flight Manual Supplement 031103030, dated March 3, 2004, or later FAA Approved revisions to (1) or (2). Held by Duncan Aviation INC, which holds 316 approved modifications in all. Last revised March 3, 2004. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Learjet Inc.
- Models
- 55
- Type certificate
- A10CE
- On this site
- Learjet 55 67 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.