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Printed page 6. PDF page 17.
crossed the Peninsula heading WN¥ to cross over Suruga Bay. At about this time, unusual phugoid and dutch roll motions began, and these phenomena accompanied by large or small motions continued until just before the crash. At 1827:02 Tokyo ControlOpen official document at PDF page 17AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119
Printed page label not indexed. PDF page 88.
the empennage is to such an extent that the non dimensional damping coefficient of the phugoid is somewhat increased with increase in aerodynamic drag. It is noted that both the gear-down ard the increase in stationary descent angle help theOpen official document at PDF page 88AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119
Printed page label not indexed. PDF page 94.
and decided to make an emergency water landing. They encountered severe dutch rol! and phugoid motions in the same manner as the accident aircraft. In most cases, all of the captains judged that it was impossible to accomplish any ofOpen official document at PDF page 94AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119
Printed page label not indexed. PDF page 124.
methods. Due to the inability to control the attitude, it became difficult to control phugoid motion excited by variation in engine thrust and external disturbance of air turbulence, etc, and sometimes the phugoid motion reached as much as about 15°Open official document at PDF page 124AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119
Printed page 117. PDF page 128.
control system was inoperative was for the purpose of restraining the dutch roll and phugoid movements. (5) From 1842:53 to 1844:43 the voice of the flight crew “heavy” was recorded four times in CYR. At that time the movement ofOpen official document at PDF page 128AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119
Printed page label not indexed. PDF page 129.
alternate system, and power control. (4) It is estimated that severe dutch roll motion and phugoid motion, which are impossible to aircraft in normal conditions, occurred and deteriorated the judgement, together with the depressurization, and control ability of the flightOpen official document at PDF page 129AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119