SA709GL
Installation of Hartzell HC-B3R30-4, -4A, -4B/ R10152-5 1/2 propeller, C-4 governor, and836-32PR spinner on P&W R-985 series engines (with 4 1/2 and 9th order crankshaft vibration dampers). (DHC-2 (L-20A) MK.I LANDPLANE; SKIPLANE, FLOATPLANE). Held by Wipaire INC., which holds 7 approved modifications in all. Last revised October 10, 2024. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Viking Air Limited
- Models
- DHC-2 Mk.I
- 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 20, 2026.