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Airworthiness Directives (ADs)

CAA-2004-11-002

The aircraft owner or operator shall comply with Airworthiness Directives issued by the CAA or the aeronautics authority of the State of Design (SoD) of the aviation products, appliances and parts, and take all necessary actions thereto.

Issue Date
2004/11/01
Applicability
747-400, -400D, and -400F Series Airplanes Equipped With General Electric (GE) or Pratt & Whitney (P&W) Series Engines
Model Number
747
CAA AD Number
CAA-2004-11-002
Aeronautics Authority of Original AD
FAA
Original AD Number
2004-22-04
Effective Date
Subject
To prevent inadvertent commanded shutdown of the engine bleed air distribution systems due to an erroneous air supply control test unit (ASCTU) command, which could cause depressurization of the airplane and subsequent ice build-up on the engine inlets during descent, which could result in ingestion of ice into the engine(s) and consequent loss of thrust on one or more engines.
Reference Publications (Revision/ATA/SB)
SB 747-36A2136R2
Remarks
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