SH475AL
Installation of ASC-3 maintenance platform, -4 maintenance platform step, and -5 personnel step. Held by Alaskan Sky-Craft CO, which holds 9 approved modifications in all. Last revised April 3, 1972. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Eurocopter France
- Models
- SA318C Alouette Astazou
- Type certificate
- 7H1
- On this site
- Sud Aviation SA 318 5 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 7, 2026.