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发表于 2009-5-11 15:54:24
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来自： 中国福建厦门
TASK 72-24-02-200-801-F00
2. Abradable Shroud (Detail) Inspection
A. General
(1) This task is the detailed inspection of the abradable shroud.
B. References
Reference
Title
72-24-02-200-802-F00
Local Recondition of the Abradable Shroud (P/B 801)
C. Tools/Equipment
Reference
Description
STD-585
Mat - Protective, 3/8 Inch Minimum Thickness, Minimum 42x60 Inches (1x1.5 meters) with Warning Streamers
D. Location Zones
Zone
Area
411
Engine 1 - Engine
421
Engine 2 - Engine
E. Prepare For the Inspection
SUBTASK 72-24-02-040-001-F00
(1) Open these circuit breakers and install safety tags:
CAPT Electrical System Panel, P18-2
Row
Col
Number
Name
B
8
(C01103)
ENGINE 1 START VALVE
F/O Electrical System Panel, P6-2
Row
Col
Number
Name
C
4
(C00154)
ENGINE 2 START VALVE
SUBTASK 72-24-02-040-002-F00
(2) Make sure the start levers are in the CUTOFF position.
SUBTASK 72-24-02-040-006-F00
(3) Install a DO-NOT-OPERATE tag on the applicable start switch.
SUBTASK 72-24-02-480-001-F00
CAUTION: MAKE SURE YOU INSTALL THE PROTECTIVE MAT IN THE INLET COWL. THIS WILL PREVENT DAMAGE FROM TOOLS, PARTS OR UNWANTED MATERIAL THAT FALL ON THE INLET COWL.
(4) Install a protective mat, STD-585 in the inlet cowl.
F. Examine the Abradable Shroud
SUBTASK 72-24-02-210-001-F00
(1) Do a visual check of the abradable shroud for damage:
(a) If you find damage that is more than these limits, do this task: Local Recondition of the Abradable Shroud, TASK 72-24-02-200-802-F00
unless you are given other instructions.
(b) Cracks
1) There is no limit to the number of cracks.
(c) Craters (length < 5X width) and damage other than cracks, grooves, circumferential damage, or rub damage
1) All of the other types of damage are permitted with these limits:
a) The total of all damaged areas is not more than 160 square inches (1032 square centimeter).
b) Each damaged area is not more than 30 square inches (193 square centimeter).
c) Each damaged area is not more than 2.5 inches (63.5 mm) in axial width.
d) The minimum distance between damaged areas is equal to the maximum width of the nearest single damaged area.
e) The fan case parent metal does not show through.
f) A Continue-In-Service limit of 50 cycles or 125 hours is permitted if the fan case parent metal of the serviceable damages remains undamaged under visual inspection..
(d) Grooves (length > 5 X width and oriented 0-80 degrees from engine axis) in the abradable shroud
1) All groove damage is permitted with these limits:
a) The maximum width of one groove is not more than 0.32 inch (8.0 mm).
b) The total groove width is not more than 1.25 inch (32.0 mm) with a separation of not less than 0.1 inch (2.5 mm).
c) The fan case parent metal does not show through.
2) The Continue-In-Service of 50 cycles or 75 hours is permitted if the fan case parent metal of the serviceable grooves remains undamaged under visual inspection.
(e) Cirumferential defect (360 degrees or oriented within 80-90 degrees from engine axis)
1) All damage is permitted with these limits:
a) The maximum width of one or cumulative defect is not more than 1.5 inch (38.1 mm).
b) The fan case parent metal does not show through.
2) The Continue-In-Service of 50 cycles or 125 hours is permitted if the maximum axial width of one or cumulative defect is not more than 2.0 inches (51 mm).
(f) Rear side strip erosion
1) The maximum permitted dimension is 3.0 inches (76.0 mm) in axial width and 0.08 inch (2 mm) in depth.
2) 2) The continue-in-service of 50 cycles or 125 hours is permitted if the maximum depth is not more than 0.16 inch ( 4.0 mm).
(g) Fan Blade Rubs
1) There is no limit to the number of fan blade rubs.
(h) If the fan case parent metal shows through, re-protect the affected area per the CFMI SPM 70-62-14 or 70-64-23 as soon as possible and no later than 50 cycles or 75 hours.
(i) If the service extension limits is expired, do, do this task: Local Recondition of the Abradable Shroud, TASK 72-24-02-200-802-F00.
G. Put the Airplane Back to its Usual Condition
SUBTASK 72-24-02-080-001-F00
WARNING: MAKE SURE THAT YOU REMOVE ALL TOOLS, PARTS, AND UNWANTED MATERIAL FROM THE INLET AREA. INJURY TO PERSONS AND DAMAGE TO EQUIPMENT COULD OCCUR ON THE SUBSEQUENT ENGINE START.
(1) Remove the protective mat, STD-585 from the inlet cowl.
SUBTASK 72-24-02-080-002-F00
(2) Remove the DO-NOT-OPERATE tag from the applicable engine start switch.
SUBTASK 72-24-02-040-003-F00
(3) Remove the safety tags and close these circuit breakers:
CAPT Electrical System Panel, P18-2
Row
Col
Number
Name
B
8
(C01103)
ENGINE 1 START VALVE
F/O Electrical System Panel, P6-2
Row
Col
Number
Name
C
4
(C00154)
ENGINE 2 START VALVE
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