(4) Start the APU and apply Bleed Air for 20 seconds, minimum (Ref. AMM TASK 49-00-00-860-008).
4. Fault Isolation
_______________
(Ref. Fig. 201/TASK 49-00-81-991-002)
**ON A/C 001-049, 101-105, 151-154, 201-207,
A. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:
NO ACCELERATION
FCU P19 / APU FUEL SUPPLY / STARTER MOTOR 8KA
associated with Fault Code Number (FCN) 215
(1) do a check for a blockage of the APU inlet.
- If the fault continues:
- check the APU accumulated hours TSN/TSO (Ref. AMM TASK 31-36-00-740-006).
(a) If the accumulated hours TSN/TSO are greater than 2000 hours:
- make sure that the APU rotates freely.
1 If the APU rotates freely:
_
- get acces to the APU DMM report (Ref. AMM TASK 49-00-00-970-001)
- compare the value of CT5ATP (corrected EGT during MES) from the DMM pade versus 663 deg.C (1225 deg.F).
「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, 107-107, 151-199, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page A203
201-210, Config-1 Aug 01/05 CES
EGT Limit (Fuel Trim) During APU Start
Figure 201/TASK 49-00-81-991-002
「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, 107-107, 151-199, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page A204
201-210, Config-1 Aug 01/05 CES
a If EGTA exceeds 663 deg.C (1225 deg.F) then continue in
_
para. 2_ .
b If EGTA does not exceed 663 deg.C (1225 deg.F) then
_ continue in para (b).
2 Get acces to the APU DMM report (Ref. AMM TASK 49-00-00-970-
_
001)
- compare the START_TIME (time of last APU start) from the DMM page versus 60 seconds.
a If START_TIME exceeds 60 seconds (slow start time) then
_ continue in para. 3_ .
b If START_TIME does not exceed 60 seconds then continue in
_
para (b).
3 Get acces to the APU SHUTDOWN report 14 (Ref. AMM TASK 31-36-
_
00-740-011):
- scan down and ensure that IGV position is within the normal range for APU start (10 - 22 degrees).
a If IGV position is not in the normal range:
_
- do a check for damage of the IGV actuator linkage and IGV assy (Ref. TASK 49-00-81-810-811).
b If IGV position is in the normal range:
_
- 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.
「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, 151-154, 201-207, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page A205
Config-1 May 01/05 CES 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 (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:
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