EASA AD US-2021-12-13
Fuel - Automatic Shutoff System - Installation / Inspection
Summary
Federal Register Volume 86, Number 119 (June 24, 2021) Final Rule titled 'Fuel - Automatic Shutoff System - Installation / Inspection' is an FAA Airworthiness Directive (AD 2021-12-13) applicable to certain Boeing 737-8 and 737-9 airplanes. It addresses a safety issue related to the automatic shutoff system during refueling of the right main tank, requiring installation of a new fuel quantity processor unit (FQPU) and software check.
What Changed
This new AD introduces a mandatory requirement to replace the existing FQPU with a new unit having part number 30128-06 or 30128-58 (or later approved part numbers) and to perform an FQPU software check. It corrects the failure of the refueling panel to indicate automatic shutoff system failure, which was not previously addressed.
Why It Matters
This AD is critical for aviation professionals because it prevents potential overfilling of the right main fuel tank during refueling, which could lead to fuel spillage and ground fire hazards. Operators and maintenance teams must ensure compliance to maintain aircraft safety and avoid regulatory penalties.
What To Do
Operators of affected Boeing 737-8 and 737-9 airplanes must install the new FQPU and conduct the required software check as specified in Boeing Special Attention Requirements Bulletin 737-28-1363 RB dated June 2, 2020. Compliance must be achieved by July 29, 2021, the effective date of this AD.
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