SA1792GL
Installation of S-TEC Model 50 autopilot system Option 1 - autopilot only; Option 2 - autopilot and electric trim; Option 3 - autopilot and yaw trim; Option 4 - autopilot, electric trim and yaw trim; Option 5 - Electric trim only. Held by Wipaire INC, which holds 64 approved modifications in all. Last revised September 18, 1992. System: flight controls.
What it applies to
- Kind of product
- Aircraft
- Design holder
- de Havilland Inc. (Canada)
- Models
- DHC-2 (L-20A) MK.III
- Type certificate
- A-806
- 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 5, 2026.