SA731EA
Installation of Stewart-Warner tachometer P/N 551-WM and flexible drive shaft P/N 446642. Held by Waco Aircraft Company, which holds 5 approved modifications in all. Last revised January 1, 1960. System: rotorcraft systems.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Aermacchi S.p.A.
- Models
- S.205-22/R
- Type certificate
- A9EU
- On this site
- Siai-Marchetti S.205/22R 22 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 5, 2026.