EASA AD 2019-0149
Powerplant — Engine Mounting Rods — Replacement
Summary
EASA Airworthiness Directive 2019-0149 is an official safety directive addressing the replacement of engine mounting rods, part number 3G7120V00132, on Leonardo S.p.A. AB139 and AW139 helicopters. This directive applies to all serial numbers of these helicopter models and mandates the removal and replacement of affected engine mounting rods due to a production non-conformity. The directive ensures continued airworthiness and safety by preventing potential rod failure.
What Changed
EASA Airworthiness Directive 2019-0149 introduces a mandatory replacement of specific engine mounting rods identified by part number and serial numbers due to degraded material strength. It requires operators to remove affected parts within specified flight hour limits and prohibits installation of these parts from the effective date. This is a new regulation addressing a previously uncorrected unsafe condition.
Why It Matters
This directive is critical for aviation professionals because failure to comply could lead to engine mounting rod failure, risking helicopter control loss. Operators and maintenance organizations must ensure timely replacement to maintain airworthiness and regulatory compliance. The directive also impacts parts inventory management by restricting installation of affected rods.
What To Do
Operators of AB139 and AW139 helicopters must inspect engine mounting rods for affected part numbers and serial numbers and replace them with serviceable parts within 25 flight hours after exceeding 200 flight hours or within 25 flight hours after the directive's effective date if already above 200 flight hours. From 1 July 2019, installation of affected parts is prohibited. Compliance must follow Leonardo Alert Service Bulletin 139-593 instructions.
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