Integrated Modular Avionics — Internal Timer — Power Cycle (Reset)
- Published
- Effective
- Deadline
- Replaces
- 2017-0209
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Airbus A380 aircraft must perform an on-ground power cycle reset within 30 days after 25 October 2017 and then at intervals not exceeding 149 hours of continuous power-up. Alternatively, operators can apply the software update as detailed in Airbus Service Bulletin A380-42-8033, which serves as a terminating action to the repetitive resets requirement.
Summary
EASA Airworthiness Directive 2017-0209R1 is an updated regulation addressing an internal timer issue in the Integrated Modular Avionics of Airbus A380-841, A380-842, and A380-861 aircraft. It applies to all serial numbers except those with Airbus modifications 77908 and 77909 incorporated during production. The directive mandates repetitive on-ground power cycles to reset the internal timer to prevent loss of communication between avionics systems.
What changed
This revision narrows the applicability by excluding Airbus A380 aircraft that have incorporated modifications 77908 and 77909 in production. It also introduces Airbus Service Bulletin A380-42-8033 as an optional terminating action, allowing operators to update the Core Processing Input/Output Module software instead of performing repetitive resets.
Why it matters
This directive is critical for maintaining flight safety by preventing partial or total loss of avionics communication caused by an internal timer exceeding 149 hours of continuous power-up. Operators and maintenance teams must ensure compliance to avoid potential redundancy loss or failure of key avionics functions, which could impact aircraft operation and safety.
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