__________ Subtask 49-42-51-860-075
A. Aircraft Maintenance Configuration
(1)
Energize the ground service network
(Ref. TASK 24-42-00-861-001).
(2)
On the panel 25VU, make sure that the APU MASTER SW p/bsw is OFF.
(3)
Put a warning notice in the cockpit to tell persons not to start the APU.
(4)
Make sure that hydraulic systems are depressurized
(Ref. TASK 29-00-00-864-001).
Subtask 49-42-51-865-077
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
Subtask 49-42-51-010-069
C. Get Access
(1)
Put the access platform in position below the APU access doors 315AL and 316AR.
(2)
Open the APU access doors 315AL and 316AR (Ref. TASK 52-41-00-010-001).
(3)
Set the LIGHT control SW 11LJ to the ON position.
R EFF : 001-049, 101-105, 107-107, 151-199, 49-42-51Page 223 201-210, Config-2 Aug 01/05
CES 4. Procedure
_________
(Ref. Fig. 202/TASK 49-42-51-991-009) Subtask 49-42-51-960-050
A. Replacement of the Resistor (R1)
(1)
Remove the cover (5) from the terminal block of the starter motor.
(2)
Remove the nut (7), the washer (8) and the signal cable (6) from the positive (+) terminal stud. Keep the power cable (9) installed.
(3)
Temporarily install the washer (8) and the nut (7) on the positive (+) terminal stud.
(4)
Be careful and do not damage the electrical wires when you remove and discard the diferent layers of shrinking sleeves (4), (3) and (2).
(5)
Cut off the leads ajacent to the splices SP26 and SP27.
(6)
Strip the wires X011A20 and X011B20 to 9.5 mm (incl. sleeve (1)).
(7)
Installation of resistor (R1)
NOTE : Refer to Detail A on Figure 202.
____
NOTE : For necessary P/Ns refer to APU harness CMM (Ref. CMM 49-11-
____
13).
(a)
Connect wire X011A20 and the lead of new resistor (R1) with splice SP26.
(b)
Apply a piece of sleeve (2) to splice SP26 and shrink the sleeve
(2) with a HOT AIR BLOWER MAX OPERATING 370 DEG C (700 DEG F).
(c)
Connect wire X011B20 and the other lead of new resistor (R1) with splice SP27.
(d)
Apply a piece of sleeve (2) to splice SP27 and shrink the sleeve
(2) with a HOT AIR BLOWER MAX OPERATING 370 DEG C (700 DEG F).
(e)
Install the shrinking sleeves (3) and (4) in sequence and apply heat to each one before you put the next sleeve in position.
(8) Remove the nut (7) and the washer (8) from the positive (+) terminal stud.
R EFF : 001-049, 101-105, 107-107, 151-199, 49-42-51Page 224 201-210, Config-2 Aug 01/05
CES
Resistor (R1) in the APU Starter-Motor Monitoring-Circuit Figure 202/TASK 49-42-51-991-009
R EFF : 001-049, 101-105, 107-107, 151-199, 49-42-51Page 225 201-210, Config-2 Aug 01/05
CES
(9) Install the monitoring cable (6), the washer (8) and the nut (7) on the positive (+) terminal stud.
(10)
TORQUE the nut (7) to between 0.85 and 0.90 m.daN (75.22 and 79.64 lbf.in).
(11)
Install the cover (5) on the terminal block of the starter motor. Subtask 49-42-51-710-053
B.
Resistance Check
(1) Do a check for a resistance of 1 KOhm of the repaired wiring with a digital multimeter between ECB pin 59KD-AB/10J and STARTER MOTOR pin 8KA (+).
5. Close-up
________ Subtask 49-42-51-410-066
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Set the LIGHT control switch 11LJ to the OFF position.
(3)
Close the APU access doors 316AR, 315AL (Ref. TASK 52-41-00-410-001).
(4)
Remove the access platform(s). Subtask 49-42-51-865-078
B.
Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD
Subtask 49-42-51-860-076
C. Aircraft Maintenance Configuration
(1)
Pressurize the reservoirs of the hydraulic systems.
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