「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 106-149, 221-299, ∞∞32-51-00∞∞∞∞∞∞∞∞∞∞Page 285
Aug 01/05 CES
R Thus if the NWS angle is correct as shown on the tool
R display, then it will be necessary to do the tawiway test
R to get an accurate rudder trim figure.
R (b) With the rudder trim figure as reference if the LASER ALIGNMENT
R TOOL is notavailable or if the nose wheels offset as shown on the
R tool display is within tolerance:
R - Do the taxi check procedure to get an accurate rudder trim
R figure.
R 1_ Align the aircraft on the centerline.
R 2_ Make sure that the engines operate at the same power level.
R 3_ Release the parking brake.
R 4_ Let the aircraft roll with the rudder pedals or the N/WS
R handwheels along the centerline.
R When the aircraft is aligned, release the rudder pedals and
R the N/WS handwheels then continue the taxi without input to
R make an estimate of the deviation.
R NOTE : The speed must be between 10 and 15 kts.____
R 5_ Align the aircraft again on the centerline with the rudder
R pedals or the N/WS handwheels.
R 6_ Give a rudder trim input opposite the aircraft deviation.
R NOTE : Give the rudder trim inputs 1 degree by 1 degree, then____
R 0.5 degree by 0.5 degree to get a fine adjustment.
R 7_ Do again the procedure and make an estimate of the new
R deviation.
R 8_ Align the aircraft again on the centerline and do again this
R procedure until the aircraft goes straight.Then record the
R rudder trim value X1.
R 9_ Do the same procedure on the same taxiway in the opposite
R direction.
R Then record the trim value X2.
R NOTE : The procedure is done in each direction to make sure____
R that the effects of cross-winds and/or runway cambers
R are not included.
R 10__ Calculate the average X of the two values X1 and X2 that you
R measured:
R X = (X1 + X2)/2
R Examples:
R X1 = +3.5 degree (L), X2 = +4.1 degree (L)
R X = (+3.5 + 4.1)/2 = +3.8 degree (L)
R X1 = +6 degree (L), X2 = -2 degree (R)
R X = (+6 - 2)/2 = +2 degree (L)
R 11__ Do the adjustment of the NWS "zero" position (Ref. AMM TASK
R 32-51-00-820-001).
R (c) Return the aircraft to service and make a record in the aircraft
R log book to monitor the NWS during the next taxi operation and to
R assess the aircraft lateral deviation, if any, using the rudder
R trim input.
R 1_ Refer to the Close-Up part (5.A) and do the relevant steps.
R (8) If the fault continues:
R - If the adjustment of the NWS Zero Position was done with the
R ALIGNMENT TOOL-NOSE WHEEL (JT2000AIRBUS), do step (7)(b).
R (9) If the fault continues after the gearbox was adjusted with the rudder
R trim angle as reference, replace the gearbox (3GC) Nose Wheel
R Steering gearbox (Ref. AMM TASK 32-51-19-000-001) and (Ref. AMM TASK
R 32-51-19-400-001).
R **ON A/C 401-499,
R E. Procedure
R (1) Depressurize the Yellow hydraulic system
R (Ref. AMM TASK 29-10-00-864-002).
R NOTE : Use the results table to help you record the different values
____ R thru the procedure that follows. R (Ref. Fig. 201/TASK 32-51-00-991-006-A)
R (2) Do a check of the steering angle on the MCDU.
R (a) On the MCDU, get the STEERING DATA for the BSCU CHAN 1 and BSCU
R CHAN 2:
R (Ref. Fig. 202A/TASK 32-51-00-991-005-A)
R - On the MCDU, get the SYSTEM REPORT/TEST/L/G page (Ref. AMM TASK
R 31-32-00-860-009).
R - On the SYSTEM REPORT/TEST/L/G page, push the line key adjacent
R to the BSCU1 indication.
R - Make sure that the N/WS handwheels and the rudder pedals are in
R the neutral position.
R - On the BSCU CHAN 1 page, push the line key adjacent to the
R SPECIFIC DATA indication.
R - On the BSCU CHAN 1/SPECIFIC DATA page, push the line key
R adjacent to the STEERING DATA indication.
R - Push the line key adjacent to the REFRESH indication.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：A320 Trouble Shooting Manual 排故手册 起落架 LANDING GEAR 2(129)
