A
747-400 MAINTENANCE MANUAL
(b) If the readings are higher than the waviness limits, contact Boeing for further analysis.
NOTE: Operators with airplanes that fail this inspection
____ can contract Boeing to do a Computational Fluid Dynamics (CFD) analysis of the skin measurements to find if the skin waviness is within the limits necessary for RVSM. The analysis examines the skin measurements from both sides of the airplane at all four pitot-static probes at the same time. An airplane which failed the dimensional check may still have skin waviness within the limits necessary for RVSM operation.
NOTE: If the CFD analysis shows the skin waviness is
____ within the limits necessary for RVSM, Boeing will take appropriate action.
NOTE: If the analysis shows that the skin waviness is not
____ within the limits for RVSM, operators can contact Boeing for shim installation instructions under the skin. After you install the shims, you should do the skin measurement and data analysis again. This will make sure the skin waviness is within the limits necessary for RVSM.
E. RVSM Reporting
NOTE: Boeing requests operators use the following Reduced Vertical
____ Separation Minimum (RVSM) reporting system to tell Boeing about airplanes that fail the skin waviness inspection.
S 976-010
(1) If you find a problem, send all information to Boeing with this heading.
ATTENTION - RVSM DISCREPANCY - SERVICE BULLETIN RELATED
_______________________________________________________
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A 747-400 MAINTENANCE MANUAL
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