EASA AD US-2022-07-06
Instruments - Electronic Flight Instrument System Interface Unit - Inspection / Replacement
Summary
The Federal Aviation Administration (FAA) Airworthiness Directive 2022-07-06 is a final rule addressing certain Boeing 747-8F and 747-8 series airplanes. It mandates inspection and possible replacement of the left, center, and right electronic flight instrument system (EFIS)/engine indication and crew alerting system (EICAS) interface units (EIUs) with specific serial numbers. This directive aims to correct unusual flight instrument and EICAS behavior that could compromise flight safety.
What Changed
This new airworthiness directive introduces mandatory inspections of EFIS/EICAS interface units for affected Boeing 747-8F and 747-8 airplanes and requires replacement of units with certain serial numbers, including the newly added serial number 181MR2. It also clarifies compliance timelines and incorporates Boeing Alert Requirements Bulletin 747-31A2565 RB, Revision 1, dated September 14, 2021, as the service information for required actions.
Why It Matters
This directive is critical for aviation professionals because it addresses a safety risk involving incorrect flight instrument and engine indication displays, which could reduce the flightcrew's ability to safely operate and land the aircraft. Operators and maintenance teams must ensure affected EIUs are inspected and replaced as necessary to maintain airworthiness and comply with FAA regulations. Failure to comply could lead to unsafe flight conditions and regulatory penalties.
What To Do
Operators of Boeing 747-8F and 747-8 series airplanes must inspect the left, center, and right EFIS/EICAS interface units for affected serial numbers as specified in Boeing Alert Requirements Bulletin 747-31A2565 RB, Revision 1. If any affected units are found, they must be replaced promptly. All actions must be completed by May 13, 2022, the effective date of the AD.
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