Airworthiness Directive · Amendment 39-11217 · Eurocopter Deutschland (Eurocopter) Model EC135 Helicopters
Eurocopter Deutschland (Eurocopter) Model EC135 Helicopters
Superseded. A later AD replaced this one: AD 2002-14-17. Comply with the one in force.
Model EC135 helicopter with main rotor hub shaft (shaft), part number (P/N) L623M100S 101, installed, certificated in any category.
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 99-12-01, which was sent previously to all known U.S. owners and operators of Eurocopter Model EC135 helicopters by individual letters. This AD requires initial and repetitive visual inspections and one dye-penetrant inspection of the main rotor hub shaft (shaft) for cracks. If a crack is found during any of the inspections, this AD requires replacing the shaft with an airworthy shaft before further flight. This amendment is prompted by the discovery of fatigue cracks on the shaft of a helicopter. The actions specified by this AD are intended to detect fatigue cracks in the shaft that could lead to shaft failure and subsequent loss of control of the helicopter.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
