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Japan Air Lines 123

Printed page label not indexed. PDF page 113.

of repair and the condition after completion of the work. It is considered that such inspection methods were in conformance with what was accepted as the general inspection method on repair and modifications. This involves checks by the airworthiness engineers
Open official document at PDF page 113AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page label not indexed. PDF page 115.

could have been possible or not to~ discover the fatigue cracks in L-18 splice by the inspection method applied in the C maintenance. (j) The inspection method of the aft pressure bulkhead in the time of C maintenance might have
Open official document at PDF page 115AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page 125. PDF page 136.

had been existent at the rivet connected portions of L18 splice were not found. The inspection method of the aft pressure bulkhead in the time of C maintenance might have been a proper method, because it was unconceivable at the
Open official document at PDF page 136AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page label not indexed. PDF page 278.

involved in the overal] visual inspection of the aft pressure bulkhead (7). (*7) Such inspection method is considered to have been adopted, because a sufficient margin of strength was provided in the mutually spliced portions of webs from the structural
Open official document at PDF page 278AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page label not indexed. PDF page 281.

(Macroscopic inspection) G2 (Microscopic inspection) 63 (special inspection) Outline An inspection method to detect defects and their symptoms by overall observation for a certain area. Defects or symptoms ‘expected to be discovered at first by this inspection are macrosco
Open official document at PDF page 281AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119

Japan Air Lines 123

Printed page label not indexed. PDF page 282.

specified for aircraft prior to 767 aircraft by the Boeing Company. The following are inspection methods prescribed in MSG-3 and MRB report of the 767 aircraft listed for reference: ‘ Inspection method Boeing standards Yalkaround Observations from the ground to
Open official document at PDF page 282AAIC final report: Japan Air Lines Boeing 747SR-100 JA8119