- check on the MCDU the load control valve position (the ADW1 parameter shows a 9 in the last position i.e. 08509 = load control valve open). (Ref. Fig. 202/TASK 49-00-00-991-001)
(1) If the ADW1 shows that the load control valve is not open (e.g. ADW1 = 08108):
- replace the LOAD CONTROL VALVE P12 (Ref. AMM TASK 49-51-51-000-001) and (Ref. AMM TASK 49-51-51-400-001).
(2) If the ADW1 shows that load control valve is fully open (e.g. ADW1 = 08109):
- in the APU compartment, do a check of the load control valve position.
(a) If the load control valve is fully open:
- do a check of the APU bleed system for leaks.
1 If the fault continues:
_
- do the trouble shooting procedure of low air pressure in the right crossbleed duct (Ref. TASK 36-12-00-810-804).
R **ON A/C 063-099, 401-499,
A. If the self test gives the maintenance message:
- CHECK PRESS XDCR WIRING (8001KM)/ECB 59KD (Ref. TASK 49-00-00-810-831),
- DIFFERENTIAL PRESS XDCR (8043KM) (Ref. TASK 49-00-00-810-827),
- TOTAL PRESS XDCR (8044KM) (Ref. TASK 49-00-00-810-828),
- SURGE CTL VALVE (8058KM) (Ref. TASK 49-00-00-810-830),
- INLET GUIDE VANE ACTR (8014KM) (Ref. TASK 49-00-00-810-824),
- LOAD CTL VALVE (8050KM) (Ref. TASK 49-00-00-810-830).
- LOAD COMPRESSOR INLET TEMP SNSR (Ref. TASK 49-20-00-810-802).
B. If the IGV parameter values are out of range:
- check that the EGT increase during a mode change (i.e. RTL to ECS).
NOTE : RTL = Ready To Load
____
(1) If the EGT increases:
- remove the IGV ACTUATOR P21 (Ref. AMM TASK 49-23-51-000-002).
- do a push/pull test on the IGVs to check the IGV movement. .make sure that the IGV has a travel range of 1 in. (25.3999 mm), .measure the force of the IGV movement.
(a) If a force less than 30 lbf.ft (4.0674 m.daN) is necessary to move the IGVs:
- replace the IGV ACTUATOR (8014KM) (Ref. AMM TASK 49-23-51-000-002) and (Ref. AMM TASK 49-23-51-400-002).
(b) If a force more than 30 lbf.ft (4.0674 m.daN) is necessary to move the IGVs or the travel range is less than 1 in. (25.3999 mm):
- replace the APU (Ref. AMM TASK 49-11-11-000-001) and (Ref. AMM TASK 49-11-11-400-001).
(2) If the fault continues:
- check the APU bleed system for leaks.
C. If the WB parameter values are out of range:
NOTE : If the value is displayed in (lb/sec) the value is 0.88 to 1.10
____
lb/sec.
- check on the visual position indicator the surge control valve position and make sure that it is in the closed position or very near to the closed position in ECS or MES mode.
(1) If the surge control valve is not closed or not very near to the closed position:
- clean the surge valve filter (Ref. AMM TASK 49-51-52-600-001).
(a) If the fault continues:
- replace the SURGE CONTROL VALVE (8058KM) (Ref. AMM TASK 49-51-52-000-002) and (Ref. AMM TASK 49-51-52-400-002).
(b) If the fault continues:
- replace the PNEUMATIC SENSOR ASSY (8039KM) (Ref. AMM TASK 49-51-13-000-001) and (Ref. AMM TASK 49-51-13-400-001).
(c) If the fault continues:
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-001) and (Ref. AMM TASK 49-61-34-400-001).
(2) If the surge control valve is closed or very near to the closed position:
- do a check of the aircraft bleed system for leaks.
R D. If the PD is more than 8 psig lower than PT (ECS or MES mode):
NOTE : PD = main engine precooler inlet air pressure (source BMC).
____
NOTE : As a general rule, the pressure drop accross the cross bleed valve
____ is 3 psig, therefore PD (RTL mode) shows approx. 3 psig higher than PD (ECS or MES mode).
- check on the MCDU the load control valve position (the ADW1 parameter shows a 9 in the last position i.e. 08509 = load control valve open). (Ref. Fig. 202/TASK 49-00-00-991-001)
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 063-099, 401-499, ∞∞49-00-00∞∞∞∞∞∞∞∞∞∞Page A271
Config-1 Aug 01/05 CES
(1) If the ADW1 shows that the load control valve is not open (e.g. ADW1 = 08108):
- replace the LOAD CONTROL VALVE (8050KM) (Ref. AMM TASK 49-51-51-000-001) and (Ref. AMM TASK 49-51-51-400-001). 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 机载辅助动力 1(62)
