Combustion Chamber (Inner and Outer Liner Inspection)
Figure 601/TASK 72-42-00-991-301
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Combustion Chamber (Sectional View)
Figure 602/TASK 72-42-00-991-302
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R Cracks and Missing Material in Dome Area Figure 603/TASK 72-42-00-991-303
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Outer Liner (Inner)
Figure 604/TASK 72-42-00-991-305
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R Inner Liner (Inner) Figure 605/TASK 72-42-00-991-306
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(2) Connect the fiber light cable to the BORESCOPE KIT (856A1320P04/P05) and to the port on BORESCOPE - LIGHT SOURCE SET (856A1322P03/P04/P07).
(3) Put the rigid borescope, (856A1320P04/P05), into the ports and turn on the light source of borescope-lightsource set (856A1322P03 or P04).
(4) Turn the rigid borescope a full 360 degrees to inspect the dome of the combustion chamber, fuel nozzles, the inner and outer liners, and the aft sections. Adjust the borescope equipment to obtain maximum clarity of view.
(5) Inspect the following :
-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
1. All surfaces for :
A. Discoloration Any amount
B. Carbon Any amount
Accumulation
C. Missing, chipped Any amount
or spalled areas
of thermal barrier
coating
2. Dome Assembly (Spectacle Plate, Deflector amd Sleeve) for :
A. Distortion of Any amount
deflector or
sleeve
B. Radial crack in Any number up to 1 in. See limit extension
spectacle plate (25.4 mm) length and not (Ref. TASK 72-00-00-200-connected to each other 025)
C. Circumferential Any number up to 3 in. See limit extension crack in spectacle (76.2 mm) length (Ref. TASK 72-00-00-200-plate separated by 6 in. 025)
(152.4 mm)
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-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS
-------------------------------------------------------------------------------R D. Connected cracks Not more than (1) radial See limit extension R in spectacle plate crack 1 in. (25.4 mm) (Ref. TASK 72-00-00-200-
long with (1) 025) circumferential crack 3 in. (76.2 mm) long
E. Missing material Max. 0.06 in. (1.52 mm) See limit extension from spectacle x 0.06 in. (1.52 mm) at (Ref. TASK 72-00-00-200-plate intersection of 025)
connected crack
F. Radial crack in Any number up to 0.5 in. See limit extension deflector or (12.7 mm) length (Ref. TASK 72-00-00-200-sleeve 025)
G. Circumferential Any number up to 0.75 See limit extension cracks in in. (19.05 mm) (Ref. TASK 72-00-00-200-deflector or 025) sleeve
H. Connected cracks Connection of any radial See limit extension in deflector or and circumferential (Ref. TASK 72-00-00-200-sleeve cracks within limits of 025)
paragraphs F. and G. above. Limit is exceeded when third crack connects
J. Missing material Any amount up to 0.2 in. See limit extension from overhangs on (5.08 mm) maximum depth. (Ref. TASK 72-00-00-200-deflector or 025) sleeve
K. Burn through holes 3 per dome 1 in. (25.4 See limit extension mm) x 1 in. (25.4 mm) (Ref. TASK 72-00-00-200-maximum 025)
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