AMC1 NCO.IDE.H.135 Flight crew interphone system

• ED Decision 2014/016/R found in: Air Operations (965/2012) Part-ARO Part-ORO Part-CAT Part-SPA Part-NCC Part-NCO Part-SPO (Sep 2023)
• ED Decision 2025/023/R found in: Air Operations Revision 24 Part-ARO Part-ORO Part-CAT Part-SPA Part-NCC Part-NCO Part-SPO (Mar 2026)

AMC1 NCO.IDE.H.135 Flight crew interphone system ED Decision 2014/016/R GENERAL (a) The flight crew interphone system should not be of a handheld type. (b) A headset consists of a communication device which includes two earphones to receive and a microphone to transmit audio signals to the helicopter’s communication system. To comply with the minimum performance requirements, the earphones and microphone should match the communication system’s characteristics and the flight crew compartment environment. The headset should be adequately adjustable in order to fit the pilot’s head. Headset boom microphones should be of the noise cancelling type. (c) If the intention is to utilise noise cancelling earphones, the pilot-in-command should ensure that the earphones do not attenuate any aural warnings or sounds necessary for alerting the flight crew on matters related to the safe operation of the helicopter. AMC1 NCO.IDE.H.135 Flight crew interphone system ED Decision 2014/016/R GENERAL (a) The flight crew interphone system should not be of a handheld type. (b) A headset consists of a communication device which includes two earphones to receive and a microphone to transmit audio signals to the helicopter’s communication system. To comply with the minimum performance requirements, the earphones and microphone should match the communication system’s characteristics and the flight crew compartment environment. The headset should be adequately adjustable in order to fit the pilot’s head. Headset boom microphones should be of the noise cancelling type. (c) If the intention is to utilise noise cancelling earphones, the pilot-in-command should ensure that the earphones do not attenuate any aural warnings or sounds necessary for alerting the flight crew on matters related to the safe operation of the helicopter. ##### AMC1 NCO.IDE.H.135 Flight crew interphone system *ED Decision 2025/023/R* **GENERAL** (a) The flight crew interphone system should not be of a handheld type. (b) A headset consists of a communication device which includes two earphones to receive and a microphone to transmit audio signals to the rotorcraft’s communication system. To comply with the minimum performance requirements, the earphones and microphone should match the communication system’s characteristics and the flight crew compartment environment. The headset should be adequately adjustable in order to fit the pilot’s head. Headset boom microphones should be of the noise-cancelling type. (c) If the intention is to utilise noise-cancelling earphones, the pilot-in-command should ensure that the earphones do not attenuate any aural warnings or sounds necessary for alerting the flight crew on matters related to the safe operation of the rotorcraft.