Airborne Auxiliary Power — Auxiliary Power Unit Fuel Control Unit — Replacement
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Airbus A330 and A340 aeroplanes must replace the affected APU fuel control units with serviceable parts within 36 months from 30 March 2023. Installation of affected parts or APUs is prohibited from the effective date. Replacement can be done by following the Airbus aircraft maintenance manual or by replacing the entire affected APU with a serviceable unit.
Summary
EASA Airworthiness Directive 2023-0057 is an airworthiness directive addressing Airbus A330 and A340 aeroplanes equipped with Honeywell GTCP331-350 auxiliary power units (APUs). The directive targets specific APU fuel control units with part numbers 3883240-3, 3883240-5, or 3883240-6 that have known cracks in the housing assembly, which could cause fuel leakage. The AD mandates replacement of affected fuel control units to ensure continued safe operation.
What changed
EASA Airworthiness Directive 2023-0057 introduces a mandatory replacement requirement for affected Honeywell GTCP331-350 APU fuel control units installed on Airbus A330 and A340 models. It prohibits installation of affected parts and requires modification or replacement within 36 months of the effective date. Additional Airbus A330 models were added to the applicability after the initial proposal.
Why it matters
This directive is critical for aviation professionals because cracks in the APU fuel control unit housing can lead to fuel leaks, potentially causing uncommanded APU shutdowns or fires in the APU compartment. Operators and maintenance organizations must comply to prevent safety hazards and ensure regulatory compliance. Failure to address this issue could result in operational disruptions and increased risk of damage to the aircraft.
More for Airbus A330
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- EASA PAD 26-107Flight Controls – Flight Control Primary Computer – ModificationSep 17, 2026
- EASA PAD 26-108Flight Controls – Flight Control Primary Computer – ModificationSep 17, 2026
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New ADs and bulletins for Airbus A330 and A340, summarized like this page, every Monday.