Power Plant — Engine Mount Bushings — Inspection / Replacement
- Published
- Effective
- Deadline
- Replaces
- 2019-0030
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of MBB-BK117 D-2 helicopters must perform repetitive inspections of engine mount bushings within specified flight hour intervals depending on bushing type and group classification. Elastomeric bushings must be replaced with metal bushings within 12 months after 27 February 2019. Any defective or worn bushings found during inspections require immediate corrective action before further flight. Additionally, installation of elastomeric bushings is prohibited after modification or specified dates. Inspection results of worn metal bushings must be reported to Airbus Helicopters Deutschland GmbH within 30 days.
Summary
EASA Airworthiness Directive 2019-0275 is an official regulatory document addressing inspection and replacement requirements for engine mount bushings on Airbus Helicopters Deutschland GmbH MBB-BK117 D-2 helicopters. It applies to all serial numbers of this helicopter model and focuses on both elastomeric and metal engine mount bushings identified by specific part numbers. The directive mandates repetitive inspections and corrective actions to prevent potential engine mount failures.
What changed
EASA Airworthiness Directive 2019-0275 supersedes the previous AD 2019-0030 and retains its requirements while introducing repetitive inspections for metal engine mount bushings due to reported damage. It also prohibits the installation of elastomeric bushings after specified modification dates and requires replacement of elastomeric bushings with metal ones within a defined timeframe. This AD is considered an interim action pending further regulatory updates.
Why it matters
This directive is critical for aviation professionals as it addresses a safety risk involving potential failure of engine mount front support pins, which could lead to loss of helicopter control. Operators and maintenance organizations must comply with inspection intervals and replacement mandates to ensure continued airworthiness and regulatory compliance. Failure to adhere to these requirements could result in unsafe operating conditions and regulatory penalties.
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New ADs and bulletins for Airbus Helicopters MBB-BK 117 and Helicopters MBB-BK117 D-2, summarized like this page, every Monday.