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时间:2011-04-12 10:00来源:蓝天飞行翻译 作者:航空
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 S 865-130
 (1)  Decrease the pressure in the shock struts of the wing landing gear to between 250 and 350 psi:
 (a)  Decrease the pressure in increments of approximately 100 psi.
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 ALL  ú ú 05S Page 511 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

AXLE  LOCA-TION WHEEL  NO. WHEEL  WHEEL WEIGHT (lbs.)  FOR AXLE) (ADD AVERAGES Y (AXLE WEIGHT)  V ING (WEIGHT-VALUE)
SAMPLE 1  SAMPLE 2  SAMPLE 3  AVERAGE 
L WING FWD  OUTBD  1 
 0 
INBD  2 
L WING AFT  OUTBD  3  0 
INBD  4 
FWD L BODY  OUTBD  5  0 
INBD  6 
AFT L BODY  OUTBD  7  0 
INBD  8 
FWD R BODY  INBD  9  0 
OUTBD  10 
AFT R BODY  INBD  11  0 
OUTBD  12 
FWD R WING  INBD  13  0 
OUTBD  14 
AFT R WING  INBD  15 
 0 
OUTBD  16 

MAIN LANDING GEAR

WHEEL LOCATION  NO. WHEEL  WHEEL WEIGHT (lbs.)  V VALUE) (WEIGHT-ING 
SAMPLE 1  SAMPLE 2  SAMPLE 3  (AVERAGE) Y 
LEFT  17  1 
RIGHT  18  1 

NOSE LANDING GEAR

Wheel Weights at Normal Strut Pressures
Figure 503

C04255
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 ALL  ú ú 05S Page 512 ú Feb 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400
MAINTENANCE MANUAL

AXLE  TION LOCA-SENSOR  NO. SENSOR  SENSOR COUNTS  COUNTS (SUM OF AVERAGES FOR AXLE) AXLE  X (DELTA COUNTS) (AXLE COUNTS -AXLE IDEAL ZERO) 
SAMPLE 1  SAMPLE 2  SAMPLE 3  AVERAGE 
FWD L WING  OUTBD  1 
 
INBD  2 
AFT L WING  OUTBD  3 
INBD  4 
L BODY FWD  OUTBD  5 
INBD  6 
L BODY AFT  OUTBD  7 
INBD  8 
R BODY FWD  INBD  9 
OUTBD  10 
R BODY AFT  INBD  11 
OUTBD  12 
R WING FWD  INBD  13 
OUTBD  14 
R WING AFT  INBD  15 
 
OUTBD  16 

MAIN LANDING GEAR

LOCATION SENSOR  SENSOR NO.  SENSOR COUNTS  (AVERAGE -(DELTA COUNTS) X IDEAL ZERO)
SAMPLE 1  SAMPLE 2  SAMPLE 3  AVERAGE 
LEFT FWD  17F 
LEFT AFT  17R 
RIGHT FWD  18F 
RIGHT AFT  18R 

NOSE LANDING GEAR

Sensor Counts at Normal Strut Pressures
Figure 504

C19991
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (b)  Make sure the pressure difference between the two shock struts of the wing landing gear is always less than 50 psi.
 (2)  S 865-034Stop for a minimum of 10 minutes to let the system and the scales become stable.
 (3)  S 975-035Collect the first set of samples: (a) Read the weight on each wheel from the scales and write the data in Figure 505, in the WHEEL WEIGHT, SAMPLE 1 column.
 NOTE:____ Wheel weights must be recorded in pounds (lbs.).
 (b)  Read the counts for each load sensor with WBC mode 22 and write the data in Figure 506, in the SENSOR COUNTS, SAMPLE 1 column.
 (4)  S 865-036Stop for a minimum of one minute.
 (5)  S 975-037Collect the second set of samples: (a) Read the weight on each wheel from the scales and write the data in Figure 505, in the WHEEL WEIGHT, SAMPLE 2 column. (b) Read the counts for each load sensor with WBC mode 22 and write the data in Figure 506, in the SENSOR COUNTS, SAMPLE 2 column.
 
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