B62298 G00332 B62354
Exhaust Duct Plug Installation 500
49-11-0 Figure 803 Feb 20/93
Page 808
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
500 APU Compartment Deactivation
Feb 20/93 Figure 804 (Sheet 1) 49-11-0
Page 809
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
APU Compartment Deactivation 500
49-11-0 Figure 804 (Sheet 2) Feb 20/93
Page 810
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
I. Cap pneumatic sensing line in upper shroud.
J. Cap the following electrical receptacles:
(1)
Starter motor
(2)
Generator
(3)
Generator control
(4)
EGT Indicating
(5)
Fire detection
(6)
APU control
K. Install dummy plug assembly to APU control receptacle on APU shroud.
L. Install coverplate at cooling air outlet (Fig. 805).
(1)
Clean faying surfaces with cleaning solvent.
(2)
Position cover over outlet duct.
(3)
Bond coverplate to outlet duct with tape.
M. Deactivate following circuit breakers by installing red collars:
(1)
FIRE DETECTION APU and APU CONT located on P6 panel.
(2)
Circuit breaker on M280 module, APU accessory unit on E3-3 electronic shelf.
N. Close following circuit breakers on P6 panel:
(1)
APU GENERATOR CONTROL
(2)
HOT BAT, BAT BUS CONT
(3)
HOT BAT BUS
(4)
HOT BAT, GEN CONT
O. Fix placard above APU control switch stating INOPERATIVE-APU REMOVED.
500
Feb 20/93 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 49-11-0 Page 811
G20465
Cooling Air Duct Coverplate Installation 500
49-11-0 Figure 805 Feb 20/93
Page 812
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
P. Perform fuel line leak test.
(1)
Open APU fuel shutoff valve using manual override lever (Fig. 801).
(2)
Operate No. 1 tank forward fuel boost pump and check for leaks at capped fuel inlet line in upper shroud. Correct any leaks.
NOTE: If you must use the fuel boost pumps in the center tank, you must have a maintenance person or observer in the flight compartment to continuously monitor the LOW PRESSURE lights. Turn the applicable fuel boost pump to the OFF position if the LOW PRESSURE light for the center tank stays on.
(3)
Shut down No. 1 tank forward boost pump and close APU fuel shutoff valve using manual override lever.
Q. Using compressed air; check shroud drain systems for free flow.
R. Perform APU bleed valve closed check.
(1)
With ac or dc electrical power available, open both engine bleed valves.
(2)
Observe that amber dual bleed indication light located on P5 panel does not illuminate. This confirms that APU bleed valve is closed.
4. APU System Reactivation (Reinstallation of APU)
A. Open following circuit breakers on P6 panel:
(1)
APU GENERATOR CONTROL
(2)
HOT BAT, BAT BUS CONT
(3)
HOT BAT BUS
(4)
HOT BAT, GEN CONT
B. Remove coverplate at cooling air outlet (Fig. 805).
C. Remove bleed air duct clamp and cover. Connect flexible connector, duct end, clamp and gasket to bleed air duct (Fig. 804).
D. Remove exhaust muffler strap assembly, hook assembly and plug (Fig. 803).
E. Open inlet door (Fig. 802).
(1)
Disconnect both pushrods from actuator arms.
(2)
FOR THE C49001 TOOL KIT;
Remove the spacers from the pushrods.
(3)
Loosen locknuts and remove both rod ends and both extension studs.
(4)
Install locknuts on male rod ends and install rod ends in both pushrods.
(5)
Adjust inlet door open position (Ref 49-15-0 A/T).
500
Sep 01/02 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 49-11-0 Page 813
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