R (b) If a force more than 20 lbf.ft (2.7116 m.daN) is necessary to
R move the IGVs or the travel range is less than 1 in. (25.3999
R mm):
R - replace the APU (Ref. AMM TASK 49-11-11-000-004) and (Ref. AMM
R TASK 49-11-11-400-004).

R (2) If the EGT increases:
R - check the APU bleed system for leaks.

R C. If the WB parameter values are out of range:
R - do a check for blockage of the APU inlet.

R (1) If the fault continues:
R - do a check of the APU BLEED CHECK-VALVE (7260HM) (Ref. AMM TASK 36-R 12-51-200-001).

R (a) If the inspection of the APU BLEED CHECK-VALVE (7260HM) is not
R OK:
R - replace the APU BLEED CHECK-VALVE (7260HM) (Ref. AMM TASK 36-R 12-51-000-001) and (Ref. AMM TASK 36-12-51-400-001).

R (b) If the inspection of the APU BLEED CHECK-VALVE (7260HM) is OK:
R - do a check for damage/contamination of the DIFFERENTIAL
R PRESSURE TRANSDUCER (8043KM) and TOTAL PRESSURE TRANSDCER
R (8044KM).
R - remove the tube of the tube of the DIFFERENTIAL PRESSURE
R TRANSDUCER (8043KM) (Ref. AMM TASK 49-51-16-000-002).
R - remove the tube of the tube of the TOTAL PRESSURE TRANSDUCER
R (8044KM) (Ref. AMM TASK 49-51-17-000-002).
R - put plugs in the openings.

R NOTE : It is recommended to use a pressure of 60-90 psig

____ R (4.14-6.20 bar) of filtered air or nitrogen to blow the R air through the tubes.
R - use a air source to remove unwanted materials out of the tubes.
 「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 : 001-049, 101-105, 151-199, 201-210, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page B260
 Config-1 Aug 01/05 CES

R  - remove the plugs from the openings. 
R  - install the tube of the DIFFERENTIAL PRESSURE TRANSDUCER 
R  (8043KM) (Ref. AMM TASK 49-51-16-400-002). 
R  - install the tube of the TOTAL PRESSURE TRANSDUCER (8044KM) 
R  (Ref. AMM TASK 49-51-17-400-002). 
R  (c) If the fault continues: 
R  - replace the DIFFERENTIAL PRESSURE TRANSDUCER (8043KM) 
R  (Ref. AMM TASK 49-51-16-000-002) and (Ref. AMM TASK 49-51-16-
R  400-002). 
R  - replace the TOTAL PRESSURE TRANSDUCER (8044KM) 
R  (Ref. AMM TASK 49-51-17-000-002) and (Ref. AMM TASK 49-51-17-
R  400-002). 
R  (d) If the fault continues: 
R  - do a check of damage/leakage of the fuel supply and return 
R  lines of the SCV 
R  1 If there is damaged/leaking in the fuel supply and return_ 
R  lines: 
R  - do a repair. 
R  2 If the fuel supply and return lines are OK:_ 
R  - replace the SURGE CONTROL VALVE (8058KM) 
R  (Ref. AMM TASK 49-51-52-000-003) and (Ref. AMM TASK 49-51-
R  52-400-003). 
R  (e) If the fault continues: 
R  - replace the ECB (59KD) 
R  (Ref. AMM TASK 49-61-34-000-003) and (Ref. AMM TASK 49-61-34-
R  400-003). 
R  D. If the PD is more than 8 psig lower than PT (ECS or MES mode): 
R  NOTE : PD = main engine precooler inlet air pressure (source BMC).____ 
R  NOTE : As a rule of thumb, the pressure drop accross the cross bleed____ 
R  valve is 3 psig, therefore PD (RTL mode) shows approx. 3 psig 
R  higher than PD (ECS or MES mode). 
R  - check on the MCDU the load control valve position (the ADW1 parameter 
R  shows a 9 in the last position i.e. 08509 = load control valve open). 
R  (1) If the ADW1 shows that the load control valve is not open (e.g. ADW1 
R  = 08108): 
R  - replace the LOAD CONTROL VALVE (8050KM) (Ref. AMM TASK 49-51-51-
R  000-004) and (Ref. AMM TASK 49-51-51-400-004). 
R  (2) If the ADW1 shows that load control valve is fully open (e.g. ADW1 = 
R  08109): 
R  - in the APU compartment, do a check of the load control valve 
R  position.

 「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 : 001-049, 101-105, 151-199, 201-210, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page B261
 Config-1 Aug 01/05 CES

R  (a) If the load control valve is fully open: 
R  - do a check of the APU bleed system for leaks. 
R  1 If the fault continues:_ 
R  - do the trouble shooting procedure of low air pressure in the 
R  right crossbleed duct (Ref. TASK 36-12-00-810-804). 
　
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