SA09502AC-D
Ins(;illation oT S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, System40/50 Single and Two Axis Automat it Flight Guidance Systems, and System 30 ALT Altitude Hold System, Model ST-881,. Held by S-Tec Corporation, which holds 1,083 approved modifications in all. Last revised September 19, 2000. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Aviat Aircraft Inc; Aviat Aircraft Inc; Aviat Aircraft Inc
- Models
- A-1, A-1A, A-1B
- Type certificates
- A22NM, A22NM, A22NM
- On this site
- Aviat Aircraft Inc A-1 Husky 896 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 21, 2026.