AD 2020-20-14: Airbus Helicopters

This AD applies to the following Airbus Helicopters model helicopters, certificated in any category: (1) Model SA-365N, SA-365N1, AS-365N2, AS 365 N3, EC 155B, and EC155B1 helicopters with a main rotor (M/R) servo actuator part number (P/N) 704A44831074 (manufacturer part number (MP/N) SC8031), P/N 704A44831117 (MP/N SC8031-1), P/N 704A44831144 (MP/N SC8031-2), P/N 704A44831106 (MP/N SC8031A), P/N 704A44831097 (MP/N SC8032), P/N 704A44831118 (MP/N SC8032-1), P/N 704A44831145 (MP/N SC8032-2), P/N 704A44831127 (MP/N SC8033-1), P/N 704A44831146 (MP/N SC8033-2), P/N 704A44831128 (MP/N SC8034-1), P/N 704A44831147 (MP/N SC8034-2), P/N 704A44831149 (MP/N SC8037), or P/N 704A44831155 (MP/N SC8037-1) manufactured before July 25, 2019 or with an unknown date of manufacture, installed. (2) Model AS350B3, AS355F, AS355F1, AS355F2, AS355N, AS355NP, EC130B4, and EC130T2 helicopters with an M/R servo actuator P/N 704A44831102 (MP/N SC8042) or P/N 704A44831103 (MP/N SC8043) manufactured before July 25, 2019 or with an unknown date of manufacture, installed.