ST177CH
Installation of AlliedSignal expanded parameter flight data recorders and associated sensors. Held by Canard Aerospace Corporation, which holds 67 approved modifications in all. Last revised May 18, 2007. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Fokker Services; Fokker Services; Fokker Services; Fokker Services; Fokker Services; Fokker Services; Fokker Services; Maryland Air Industries Inc.; Maryland Air Industries Inc.; Maryland Air Industries Inc.; Maryland Air Industries Inc.; Maryland Air Industries Inc.; Maryland Air Industries Inc.; Maryland Air Industries Inc.; Maryland Air Industries Inc.; Maryland Air Industries Inc.; Maryland Air Industries Inc.; Maryland Air Industries Inc.; Maryland Air Industries Inc.
- Models
- F27 Mark 100, F27 Mark 200, F27 Mark 300, F27 Mark 400, F27 Mark 500, F27 Mark 600, F27 Mark 700, F-27, F-27A, F-27B, F-27F, F-27G, F-27J, F-27M, FH-227, FH-227B, FH-227C, FH-227D, FH-227E
- Type certificates
- A-817, A-817, A-817, A-817, A-817, A-817, A-817, 7A1, 7A1, 7A1, 7A1, 7A1, 7A1, 7A1, 7A1, 7A1, 7A1, 7A1, 7A1
- 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.