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Japan Air Lines 123

Printed page 6. PDF page 17.

Civil Aviation Bureau, reads; IFR, cruising speed 467 knots CTAS) at cruising altitude 24,000 feet, destination Osaka International Airport, via Mihara Sagara, Seaperch, ¥27, Kushimoto VORTAC, ¥55, Shinoda VOR/DME, and Osaka NDB, estimated flight hours 54 minutes up to Os
Open official document at PDF page 17AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page 7. PDF page 18.

which the pilot responded “Now descending” at 1831:07, and then reported his altitude as 24,000 feet in response to the subsequent inquiry on current altitude. To a question made by Tokyo Control at 1831:14 “Your present position is 72 NM
Open official document at PDF page 18AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page label not indexed. PDF page 104.

deterioration of ability to perform intelligent work due to hypoxic hypoxia at an altitude of 24,000 feet, two subjects (male A, age 26; male B, age 28) were taken on board the low pressure chamber with oxygen masks put on,
Open official document at PDF page 104AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page label not indexed. PDF page 105.

cabin altitude of 650 feet, then decreased to the pressure equivalent to the altitude of 24,000 feet in almost five seconds, and thereafter was maintained at the pressure equivalent to an altitude of more than 20,000 feet for about 20
Open official document at PDF page 105AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page label not indexed. PDF page 106.

average voice fundamental frequency, but remained constant thereafter. In the test at the 24,000 feet altitude, the subject “A” showed, after the elapse of about 5 minutes, significant increase in response time, frequent false answers, decrease in the average voice
Open official document at PDF page 106AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page label not indexed. PDF page 116.

of L18 Splice It is estimated that at the time the accident aircraft climbed to about 24,000 feet, the differential pressure between the pressurized passenger cabin and outside atmosphere became 8.66 psi, and L18 splice having the afore-mentioned fatigue cracks
Open official document at PDF page 116AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119