Summary
We propose to supersede airworthiness directive (AD) 2014-19- 05 that applies to all Turbomeca S.A. Arriel 1A1, 1A2, 1B, 1C, 1C1, 1C2, 1D, 1D1, 1E2, 1K1, 1S, 1S1, 2B, 2B1, 2C, 2C1, 2C2, 2S1, and 2S2 turboshaft engines. AD 2014-19-05 requires an initial one-time vibration check of the engine accessory gearbox (AGB) on certain higher risk Arriel 1 and Arriel 2 model engines and repetitive vibration checks for all Arriel 1 and Arriel 2 engines. Since we issued AD 2014- 19-05, we determined that a Technical Instruction (TI) number and a Test Bed Acceptance Test Specifications number in the Actions and Compliance and the Related Information sections are incorrect. This proposed AD would correct these numbers. We are proposing this AD to prevent failure of the engine AGB, which could lead to in-flight shutdown and damage to the engine, which may result in damage to the aircraft.