SA330NW
Installation of automatic flagman model no 4. Held by R-S Sales INC., which holds 22 approved modifications in all. Last revised August 27, 2001. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Weatherly Aircraft Company; Weatherly Aircraft Company; Weatherly Aircraft Company; Weatherly Aircraft Company; Weatherly Aircraft Company; Weatherly Aircraft Company
- Models
- 201B, 201C, 620, 620A, 620B, 620TP
- Type certificates
- A10WE, A10WE, A26WE, A26WE, A26WE, A26WE
- On this site
- Weatherly Aviation Co Inc 620 29 registered
Weatherly 201 12 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.