SA02099AK
Installation of hourmeter airspeed switch. Held by Avalaska INC, which holds 8 approved modifications in all. Last revised January 16, 1998. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Bombardier-Rotax GmbH; de Havilland Inc. (Canada); de Havilland Inc. (Canada); de Havilland Inc. (Canada)
- Models
- Otter DHC-3 (U-1A), DHC-2 (L-20A) MK.III, DHC-2 (L-20A) MK.I, L-20A
- Type certificates
- A-815, A-806, A-806, AR-33
- 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.