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Japan Air Lines 123

Printed page 130. PDF page 141.

the aft pressure bulkhead (Safety Recommendation A-85-136, Dec.5, 1985) The current repair procedures of Boeing 747 and 767 aft pressure bulkheads should be evaluated to ensure that the repairs do not affect the fail-safe concept. e) Revision of the inspection
Open official document at PDF page 141AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page label not indexed. PDF page 142.

aft pressure bulkheads of Boeing 747 and 767. (A-85-135 related) c) Evaluation of the repair procedures for the domed aft pressure bulkhead (Airworthiness Directive AD-85--22-12, Oct.25, 1985) To request the operators to check on whether repairs of the aft pressure
Open official document at PDF page 142AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page label not indexed. PDF page 143.

the damage tolerance design is also under way. (A-85-138 related) e) Evaluation of the repair procedures of the domed aft pressure bulkhead FAA requested the large transport airplane manufacturers to review the repair criteria for the domed aft pressure bulkhead
Open official document at PDF page 143AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page label not indexed. PDF page 144.

March 1986 and in July 1986, respectively. (A-85-135 and -138 related) d) Evaluation of repair procedures of the aft pressure bulkhead Boeing sent a telegram to the operators requesting them to check whether repairs have been carried out, and to
Open official document at PDF page 144AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page label not indexed. PDF page 146.

its installation is made at the production time. (A-85--134 related) c) Evaluation of repair procedures of the domed aft pressure bulkhead Inspection on all aircraft in current use was made as to whether repairs were conducted and to what extent
Open official document at PDF page 146AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119