SA94EA

Installation of Monitair angle of attack system, Model AA-2. Held by Rosemount Engineering CO, which holds 14 approved modifications in all. Last revised February 14, 1972. System: instruments and avionics.

What it applies to

Kind of product: Aircraft
Design holder: The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company
Models: 182F, 182E, 182D, 182C, 182B, 182A, 182, 180, 180E, 180D, 180C, 180B, 180F, 180A
Type certificates: 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6
On this site: Cessna 180 Skywagon 2,606 registered
Cessna 182 Skylane 11,828 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 8, 2026.