CONTINUOUS AXIAL CRACK
INNER COMBUSTION CHAMBER
BULKHEAD
FWD
OUTER COMBUSTION CHAMBER
INDIVIDUAL AXIAL CRACK BURNEDLOUVER LIP GAP AREAS DISCOLORED OR MILDLYCLOSURE AND BURNING BURNED AREA
CONTINUOUS AXIAL CRACKS (MORE THAN 3 LOUVERS),
YOU MUST DO AN OD (COLD SIDE) INSPECTION. IF 1ST-STAGE L-A3324 (0395)
YOU CAN NOT DO AN OD INSPECTION, THIS CRACK HPT VANES
IS NOT PERMITTED.
FWD BENT, BUCKLED OR DISTORTED
BULKHEAD LOUVERS
INNER COMBUSTION CHAMBER
BURN STREAK
OUTER COMBUSTION CHAMBER
MISSING LOUVER CHIPPED COATING, 1ST-STAGE HPT VANES
LIP MATERIAL COATING LOSS L-A3328
VIEW IN THE CIRCUMFERENTIAL DIRECTION
Inner and Outer Combustion Chamber Distress Figure 619 (Sheet 1)
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CONTINUOUS AXIAL CRACK
INDIVIDUAL AXIAL CRACKS, THESE CRACKS CAN BE A CONTINUOUS CRACK ON THE ID SIDE
LOUVER KNUCKLE
OD (COLD SIDE) VIEW OF OUTER COMBUSTION CHAMBER
L-B0742 (0000)
PW V
Inner and Outer Combustion Chamber Distress
Figure 619 (Sheet 2)
F69414
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
COMBUSTION CHAMBER
VIEW LOOKING CIRCUMFERENTIALLY
L-A3325
CRACK
LENGTH
L-A3327
Inner and Outer Combustion Chamber Distress Figure 619 (Sheet 3)
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0.43 INCH (10.922 mm) INNER FACE WIDTH (REF)
FUEL INJECTOR
ENDCAP SEGMENTS
SEE
COMBUSTION CHAMBER BULKHEAD
Combustion Chamber Bulkhead and Fuel Injector Guide Heatshield Distress
Figure 620 (Sheet 1)
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
0.30 INCH (7.62 mm)
FROM EDGE OF INNER FACE
EXPOSED
TO OUTER FACE AT I.D LOCATION
OUTER HEATSHIELD FACE (PERIMETER)
INNER HEATSHIELD FACE
OUTER HEATSHIELD FACE EROSION (DECREASED TIME INSPECTION LIMIT)
EROSION OF OUTER HEATSHIELD FACE
L-A3321
TO OUTER FACE AT O.D LOCATION
FUEL INJECTOR GUIDE HEATSHIELD
CIRCUMFERENTIAL CRACKS CRACKS
RADIAL
END CAP SEGMENT LIBERATION (BROKEN AWAY) FUEL INJECTOR ENDCAP SEGMENTS
IMPINGEMENT
HOLES (EXAMPLE)
A-A Combustion Chamber Bulkhead and Fuel Injector Guide Heatshield DistressFigure 620 (Sheet 2)
C15899
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No. 16 - Combustion Chamber Inspection
______________________________________
(a) These conditions of damage occur in the inner and outer combustion chamber assembly: 1) The conditions that follow are examples of burned or eroded
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