Electrical Power – Direct Current Electrical Master Box – Inspection
Proposal for consultation. Not binding until EASA issues the final AD; the requirements can still change.
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Airbus Helicopters AS 332 C, C1, L, and L1 must inspect the affected DC electrical master box parts within 550 flight hours or 26 months from the directive's effective date. If any issues are found during inspection, corrective actions must be completed before the next flight. Additionally, any installation or reinstallation of affected parts must be preceded by inspection and correction as required by the directive.
Summary
EASA Airworthiness Directive PAD No. 26-074 is a proposed directive addressing the inspection of the direct current electrical master box on Airbus Helicopters AS 332 C, C1, L, and L1 models. It targets the printed circuit boards with part number GC11050 and serial numbers up to 400, aiming to prevent electrical short circuits that could affect the helicopter's DC power supply system.
What changed
This new proposed Airworthiness Directive introduces mandatory inspections of the affected DC electrical master box components within 550 flight hours or 26 months after the effective date. It requires corrective actions if discrepancies are found and sets conditions for the installation or reinstallation of affected parts only after inspection and correction.
Why it matters
This directive is critical for aviation professionals as it addresses a potential unsafe condition that could lead to loss of control of the helicopter due to DC power loss. Operators and maintenance organizations must ensure compliance to maintain aircraft safety and airworthiness, preventing cascading electrical failures in essential systems.
More for Airbus Helicopters SA 330
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- EASA AD 2026-0166Fuselage – Splice of Frame X5295 – InspectionAug 19, 2026
- EASA AD 2026-0148Electrical Power – Direct Current Electrical Master Box – InspectionJul 28, 2026
- EASA AD 2023-0148R1Main Rotor Drive – Main Gearbox – Replacement; Placards and Markings – ENG1 Training Idle Switch – Installation / Operational RestrictionJul 24, 2026
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