SA707NW

Installation of weather radar system. Held by Sierra Industries INC, which holds 34 approved modifications in all. Last revised July 31, 2017. System: other and general.

What it applies to

Kind of product: Aircraft
Design holder: Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.
Models: 36, A36, S35, V35, V35A, V35B
Type certificates: 3A15, 3A15, 3A15, 3A15, 3A15, 3A15
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.