SA743WE
Sperry SP-40 autopilot and HZ4-R4A integrated flight system. Held by Intermountain Avn INC, which holds 8 approved modifications in all. Last revised January 1, 1960. System: flight controls.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Douglas Aircraft Co. Inc.; Douglas Aircraft Co. Inc.
- Models
- Army A-26B, Army A-26C
- Type certificates
- L-3-4, L-3-4
- 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.