SR11844CH
Installation of Heli-Preheat Kit, p/n TA3391-1 for 115 volt application. Held by Hartzell Propeller LLC, which holds 16 approved modifications in all. Last revised August 12, 2026. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Airbus Helicopters Deutschland GmbH (AHD); Airbus Helicopters Deutschland GmbH (AHD); Airbus Helicopters Deutschland GmbH (AHD); Airbus Helicopters Deutschland GmbH (AHD); Airbus Helicopters Deutschland GmbH (AHD); Airbus Helicopters Deutschland GmbH (AHD); Airbus Helicopters Deutschland GmbH (AHD); Airbus Helicopters Deutschland GmbH (AHD); Airbus Helicopters Deutschland GmbH (AHD)
- Models
- EC135T1, EC135T2, EC135T2+, EC135T3, EC635T2+, EC135P1, EC135P2, EC135P2+, EC135P3
- Type certificates
- H88EU, H88EU, H88EU, H88EU, H88EU, H88EU, H88EU, H88EU, H88EU
- On this site
- Airbus Helicopters EC-135 now H135 396 registered
- 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 5, 2026.