Airworthiness Directive · Amendment 39-17578 · Extinguishing system
Eurocopter Deutschland GmbH Helicopters
This AD applies to Eurocopter Deutschland GmbH (ECD) Model EC135P1, EC135P2, EC135P2+, EC135T1, EC135T2, and EC135T2+ helicopters with a fire extinguishing system part number (P/N) L262M1808101, P/N L262M1812101, or P/N L262M1812102 installed, certificated in any category.
We are adopting a new airworthiness directive (AD) for Eurocopter Deutschland GmbH (ECD) Model EC135P1, EC135P2, EC135P2+, EC135T1, EC135T2, and EC135T2+ helicopters with certain fire extinguishing systems installed. This AD requires modifying the fire extinguishing system injection tubes. This AD is prompted by a report that the injection tubes are deforming due to heat. The actions required by this AD are intended to prevent deformation of the fire extinguishing system injection tubes during a fire, which could result in impaired distribution of the fire extinguishing agent, failure of the fire extinguishing system to contain an engine fire, and subsequent loss of control of the helicopter.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
(1) Within 30 days, modify each fire extinguishing system injection tube by removing and replacing a section of the tubing in accordance with the Accomplishment Instructions, paragraph 3.B., of Eurocopter EC135 Alert Service Bulletin No. EC135-26A-003, Revision 2, dated December 19, 2011.
(2) Do not install an injection tube, P/N L262M1810101, P/N L262M1811801, or P/N L262M1809101, on any helicopter unless it has been modified as required by this AD.
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.
