The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · reissued

SR09529RC

Installation of Engine Idle Aural Alert system. Held by Phi INC, which holds 9 approved modifications in all. Last revised February 25, 2010. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
Eurocopter Deutschland GmbH
Models
EC135
Type certificate
H88EU
On this site
Airbus Helicopters EC-135 now H135 397 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 7, 2026.