Summary
We propose to adopt a new airworthiness directive (AD) for Airbus Model EC225LP helicopters. This proposed AD would require repetitive visual and tap test inspections of each main rotor blade (blade) leading edge stainless steel protective strip (strip) for a crack, cut, or blind or open debonding (debonding), and taking approved corrective measures. If there is a crack or if there is debonding that exceeds acceptable limits, this AD would require, before further flight, repairing or replacing the blade with an airworthy part. This proposed AD is prompted by suspected water seepage through a crack in the blade strip resulting in significant debonding. The proposed actions are intended to prevent loss of the blade strip, excessive vibrations induced by blade weight imbalance, and subsequent loss of control of the helicopter.