_
- scan down to lines labled "8N" and "9N", or to lines where EGTA is highest.
- compare APU speed (NA) and EGTA versus LCIT on Fig. 201.
- . If EGTA exeeds value on Fig. 201
- .. high EGT is determined (HOT SECTION DISTRESS).
- .. replace the APU (4005KM) (Ref. AMM TASK 49-11-11-000-004) and (Ref. AMM TASK 49-11-11-400-004).
- . If EGTA does not exeed value on Fig. 201 then continue in Para. (b).
4 If the APU does not rotate freely:
_
- replace the APU (4005KM) (Ref. AMM TASK 49-11-11-000-004) and (Ref. AMM TASK 49-11-11-400-004).
(b) If the accumulated hours TSN/TSO are lower than 2000 hours:
- replace the STARTER MOTOR (8KA) (Ref. AMM TASK 49-42-51-000-004) (Ref. AMM TASK 49-42-51-400-004).
1 If the fault continues:
_
- do a check of the aircraft BATTERIES (Ref. AMM TASK 24-38-00-210-001).
2 If the fault continues:
_
- do a check for damage/leakage of the APU fuel system.
a If there is damage/leakage in the APU fuel system:
_ - do a repair.
b If the APU fuel system is OK:
_
- do a check for APU internal damage.
- do a check for contamination of the MAGNETIC-DRAIN PLUG (8077KM) (Ref. AMM TASK 49-91-42-200-004) .
NOTE : If the MAGNETIC-DRAIN PLUG is not contaminated,
____ continue without starting the APU.
- .
- remove the end cap of the STARTER MOTOR (8KA).
- use a socket and a ratchet on the shaft of the STARTER MOTOR (8KA) to turn the APU counterclockwise (in the direction of the arrow on the housing).
- make sure that the APU rotates freely.
c If the APU rotates freely:
_
- replace the FUEL FILTER (8028KM) (Ref. AMM TASK 49-32-41-920-001).
- If the fault continues:
- . replace the FUEL CONTROL UNIT (8022KM) (Ref. AMM TASK 49-32-11-000-003) and (Ref. AMM TASK 49-32-11-400-003).
- If the fault continues:
「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 : 001-049, 101-105, 151-158, 201-209, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page A213
Config-1 Aug 01/05 CES
- . replace the FLOW DIVIDER (8024KM) (Ref. AMM TASK 49-32-13-000-001) and (Ref. AMM TASK 49-32-13-400-001).
- If the fault continues:
- . do a check for damage of the IGV ACTUATOR (8014KM) linkage and the IGV assembly
- If the IGV ACTUATOR linkage/IGV assembly are damaged and/or do not move freely:
- . replace the APU (4005KM).
- If the IGV ACTUATOR linkage/IGV assembly are OK:
- . replace the APU INLET PRESSURE TRANSDUCER (8048KM) (Ref. AMM TASK 49-51-21-000-001) and (Ref. AMM TASK 49-51-21-400-001).
- If the fault continues:
- . replace the APU INLET TEMPERATURE SENSOR (8010KM) (Ref. AMM TASK 49-23-14-000-001) and (Ref. AMM TASK 49-23-14-400-001).
- If the fault continues:
- . replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-003) and (Ref. AMM TASK 49-61-34-400-003).
- If the fault continues:
- . replace the EGT 1 and/or 2 THERMOCOUPLE (Ref. AMM TASK 49-72-15-000-002) and (Ref. AMM TASK 49-72-15-400-003).
d If the APU does not rotate freely:
_
- replace the APU (4005KM) (Ref. AMM TASK 49-11-11-000-004) and (Ref. AMM TASK 49-11-11-400-004).
R **ON A/C 001-049, 101-105, 107-107, 151-154, 201-207,
B. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:
NO ACCELERATION
FUEL CONTROL UNIT P19
associated with Fault Code Numbers (FCN) 76 OR 77
- do a check for damage/contamination of electrical connector P19 of the FUEL CONTROL UNIT (P19)
(1) If the electrical connector P19 is damaged/contaminated:
- do a repair/cleaning.
(2) If the electrical connector is OK:
- use a multimeter to do a resistance check across pin 2 and pin 3 (PRIMARY FCU RESOLVER); required value between 30 Ohms and 200 Ohms and pin 2/pin 3 and pin 1 (PRIMARY FCU RESOLVER); required value > 100 kOhms and
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