Airworthiness directives › 2022-17-04
AD 2022-17-04 Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
Models named: DHC-8-400, -401, -402. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to De Havilland Aircraft of Canada Limited (type certificate previously held by Bombardier, Inc.) Model DHC-8-400, -401, and -402 airplanes, certificated in any category, serial numbers (S/Ns) 4001, 4003, and subsequent.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For the purposes of this AD, “prohibited tasks” are defined as any task identified in paragraph (l) of this AD and any procedure or task that specifies fuel tank access using non-manufacturer-approved procedures.
Unsafe condition
This AD was prompted by reports of broken P-clamps on the pressure relief line and the motive flow line in the fuel tanks, and a subsequent determination that certain service information lacked instructions for maintaining appropriate clearance between certain fuel tubes and their support brackets, and may also have led to incorrect installation of certain Teflon TM sleeves. The FAA is issuing this AD to address adverse impacts on the integrity of the electrical bonding paths throughout the fuel line, which could lead to arcing between the vent line and airplane structure, and could result in possible fuel tank ignition in the event of a lightning strike.
Affected ADs
None.
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1