ST944SO
Installation of (1) Class 'B' cargo compartment, (2) cargo restraining bulkhead, and (3) smoke detector system. STC ST906SO is a required part of this STC. (22M 880). Held by Aeronautical Engineers, INC, which holds 59 approved modifications in all. Last revised July 21, 1977. System: emergency equipment.
What it applies to
- Kind of product
- Aircraft
- Design holder
- General Dynamics Corporation; General Dynamics Corporation
- Models
- 22, 22M
- Type certificates
- 4A27, 4A27
- 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 20, 2026.