Summary
We propose to revise airworthiness directive (AD) 2011-22-05 for Eurocopter France (Eurocopter) Model AS350B, B1, B2, B3, BA, C, D, D1, AS355E, F, F1, F2, N, and NP helicopters with certain tail rotor pitch control rods installed. AD 2011-22-05 currently requires, before the first flight of each day, checking the tail rotor (T/R) pitch control rod (control rod) outboard spherical bearing (bearing) for play. If play exists, AD 2011-22-05 requires measuring the bearing's radial and axial play. Since we issued AD 2011-22-05, we have determined that we can safely extend the compliance time to perform the initial and recurring checks for bearing play. The proposed actions are intended to prevent failure of a control rod, loss of T/R control, and subsequent loss of control of the helicopter.