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Printed page label not indexed. PDF page 118.
separation of the upper and the lower rudder after the abnormal situation occurred, the four systems of hydraulic lines to the rudder PCP's were fractured at the bent between the fuselage near BS2540 and the stabilizer, or near the lowerOpen official document at PDF page 118AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119
Printed page label not indexed. PDF page 129.
situation where part of the vertical fin is separated and the hydraulic pressure of all four systems decrease to zero and most of control functions are lost would be out of the scope of the education and training or knowledgeOpen official document at PDF page 129AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119
Printed page 126. PDF page 137.
damage to the aft torque box of the vertical fin caused separation of the rudder, and four systems of hydraulic pressure line for the rudder control system were all fractured. 4.1.6.6 It is estimated that such destruction of the aircraftOpen official document at PDF page 137AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119
Printed page label not indexed. PDF page 65.
leading edge flap is estimated to have been at extended position from an investigation on four leading edge flap rotary actuators (set position unknown for all). 2.15.3 Investigation of Warning Lights, Switch Lights, ete It was very difficult to identifyOpen official document at PDF page 65AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119
Printed page label not indexed. PDF page 123.
for the hydraulic system for the control. (2) In this accident, functions of all the four hydraulic systems were lost and the control systems became all inoperative soon after the abnormal situation occurred in flight. The reason would be thatOpen official document at PDF page 123AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119
Printed page 130. PDF page 141.
A-85-134, Dec.5, 1985) Design mofification should be made so that the integrity of all four hydraulic systems will not be impaired in the event that a significant pressure buildup occurs in the normally unpressurized empennage. c) Reevaluation of the fail-safeOpen official document at PDF page 141AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119