EASA AD 2022-0152-E
SUPERSEDED BY EASA AD 2022-0182-E
Summary
EASA Airworthiness Directive 2022-0152-E is an emergency directive addressing safety concerns for Leonardo S.p.A. AB139 and AW139 helicopters. It mandates inspections and potential replacement of tail rotor duplex bearings with specific part numbers to prevent structural failure. The directive applies to all serial numbers of these helicopter models.
What Changed
This directive introduces mandatory repetitive inspections and replacement requirements for affected tail rotor duplex bearings that may have been improperly reinstalled. It defines helicopter groups based on bearing usage history and sets specific inspection intervals and replacement deadlines. The directive also permits installation of only serviceable parts or assemblies from its effective date.
Why It Matters
This directive is critical for aviation professionals to prevent potential loss of helicopter control due to bearing failure. Operators and maintenance organizations must ensure compliance to maintain airworthiness and avoid unsafe conditions. It impacts maintenance scheduling, parts inventory, and compliance monitoring for affected helicopter fleets.
What To Do
Operators must perform initial and repetitive inspections of the affected tail rotor duplex bearings according to helicopter group classifications, replacing any discrepant parts before further flight. Replacement deadlines vary by group but generally require action within 10 flight hours or before reaching specified flight hour limits. Only serviceable parts or assemblies may be installed from 28 July 2022 onward.
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