SA255NM
Installation of KS Avionics EGT/CHT-2( ) combined exhaust gas and cylinder head temperature monitoring system. Held by K S Avionics INC, which holds 6 approved modifications in all. Last revised April 29, 1985. System: engine.
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.I, DHC-2 (L-20A) MK.II, DHC-2 (L-20A) MK.III
- Type certificates
- A-815, A-806, A-806, 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 8, 2026.