Airplane Flight Manual / Weight and Balance Control and Loading Manual - Fuel Operating Limitations - Revision
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Boeing 777-200LR airplanes must revise the flight manual and loading documents to incorporate revised fuel operating limitations by July 27, 2018. Alternatively, for certain airplanes, they may perform the specified modifications and software updates as an acceptable compliance method. Comments on the AD are invited until August 27, 2018.
Summary
The Airplane Flight Manual / Weight and Balance Control and Loading Manual - Fuel Operating Limitations - Revision is a Federal Aviation Administration (FAA) airworthiness directive (AD) addressing certain Boeing 777-200LR series airplanes. It mandates revising specific operational documents to update fuel operating limitations and offers an alternative option involving modification of water and fuel scavenge systems, electrical changes, and new software installation. This AD aims to resolve unsafe conditions caused by unreliable water and fuel scavenge system performance.
What changed
This AD introduces a requirement to revise airplane flight and loading manuals to reflect updated fuel operating limitations for affected Boeing 777-200LR airplanes. It also provides an optional compliance method involving modification of fuel scavenge systems, electrical updates in the main equipment center, and installation of new ELMS2 software. The AD terminates certain requirements from a previous AD (2016-11-03) for applicable airplanes.
Why it matters
The directive addresses a critical safety issue where water in fuel tanks can freeze and block fuel scavenge lines, potentially causing fuel starvation and engine power loss. For operators and maintenance teams, compliance ensures continued safe operation and prevents in-flight fuel exhaustion. It also clarifies acceptable compliance options, aiding in maintenance planning and regulatory adherence.
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