1.During inspection, JAL encountered several circumstances that other structures
prevents the inspection specified in source SB, therefore JAL feels the necessity
to incorporate more detailed information into SB to prevent inconvenience of
operator.
2.If discrepancies are found, operators have to contact manufacturer for repair
method. However, there should be many inquiries from operator to manufacturer,
and operator may have difficulty to receive reply from manufacturer in timely
manner. Therefore JAL would like to ask FAA to wait until typical repair being
incorporated into SRM.
3.In SB, inspection interval is same between butt joint to butt joint, or lap joint to
lap joint. However due to our understanding, stress value can be provided between
stringer to stringer, or frame to frame. Therefore JAL would like manufacturer to
incorporate more detail inspection interval into SB and also would like to ask FAA
to wait until issuance of SB Rev.3 which incorporates more detail inspection
interval.
Masami Suzuki - JAL
This is comment on Rule
Airworthiness Directives; Boeing Model 747 Airplanes
View Comment
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