SA170SO
Auxiliary fuel system and bladder type tanks in leading edges of the wings. Held by Riley Turbostream CORP, which holds 19 approved modifications in all. Last revised August 6, 1974. System: fuel system.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The de Havilland Aircraft Co. Ltd (England)
- Models
- DH 104 Dove Series
- Type certificate
- A-807
- 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 19, 2026.