757 MAINTENANCE MANUAL
(b) Make sure these indications show on the BPCU: 1) EXTERNAL POWER SYSTEM 2) LEFT GEN POWER SYSTEM 3) RIGHT GEN POWER SYSTEM 4) APU GEN POWER SYSTEM
S 745-006
(2) Do the BITE Test:
(a)
Momentarily push the BIT switch on the front of the BPCU.
(b)
Make sure these indications show on the BPCU: 1) EXTERNAL POWER SYSTEM 2) OK 3) LEFT GEN POWER SYSTEM 4) OK 5) RIGHT GEN POWER SYSTEM 6) OK 7) APU GEN POWER SYSTEM 8) OK 9) LAST FLT 00 END OF DATA 10) FOR PREVIOUS FLT PUSH NOW
NOTE: The above sequence is shown when the power system
____ has no fault. If a fault is found, the applicable fault message will be displayed in place of the OK message.
(c)
Repair any message which is displayed on the BPCU.
(d)
If it is necessary to see this display again, stop until the FOR PREVIOUS FLT PUSH NOW indication goes off. Then, momentarily push the PERIODIC TEST switch.
TASK 24-11-00-715-002
3. The Operational Test for the Left IDG_____________________________________
A. General
(1) This procedure does these tests:
(a)
The Operation Test
(b)
The Load Test
(c)
The IDG Disconnect Test and the Connect Test
B. References
(1)
AMM 24-22-00/201, Electrical Power - Control
(2)
AMM 71-00-00/201, Power Plant (Operating Procedures)
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(3)
AMM 71-00-00/501, Power Plant
(4)
AMM 71-11-04/201, Fan Cowl Panels
C. Access
(1)
Location Zones
212 Flight Compartment (RH Side)
119/120 Main Equipment Center
410 Power Plant Nacelle (Left)
420 Power Plant Necelle (Right)
(2)
Access Panels
413/423 Fan Cowl Panels (Left)
414/424 Fan Cowl Panels (Right)
119/120 Main Equipment Center
D. Prepare for the Test
S 745-035
(1)
Do the BITE test (AMM 24-11-00/501).
S 865-032
(2)
Supply external or APU power to the 115V ac buses
(AMM 24-22-00/201).
S 045-026
WARNING: DO THE DEACTIVATION PROCEDURE FOR THE SPOILERS OR MOVE ALL
_______ PERSONS AND EQUIPMENT AWAY FROM THE SPOILERS. THE SPOILERS CAN RETRACT QUICKLY AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(3) Do the deactivation procedure for the spoilers (AMM 27-61-00/201) or move all persons and equipment away from the spoilers.
E. The Operation Test
S 715-036
(1) Do the operation test:
(a)
Set the L GEN CONT switch on the P5 panel to the OFF position.
(b)
Make sure these lights are on: 1) The yellow OFF light in the L GEN CONT switch (P5). 2) The yellow DRIVE light in the L GEN DRIVE DISC switch (P5).
(c)
Set the selection switch for the EICAS computer on the P9 panel to the AUTO position.
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(d)
Push the selection switch for the ELECT/HYD display on the right side panel P61.
(e)
Make sure these indications for the left power channel show on the lower EICAS display: 1) AC-V = 0 |5 2) FREQ = 0 |5 3) Make sure no L GEN OFF or L GEN DRIVE show on the EICAS
display.
(f)
Operate the left engine (AMM 71-00-00/201).
CAUTION: MAKE SURE THE YELLOW DRIVE LIGHT IN THE L GEN DRIVE DISC
_______ SWITCH (P5) GOES OFF AFTER YOU START THE ENGINE. HIGH OIL OUT TEMPERATURE OR LOW OIL PRESSURE CAN CAUSE DAMAGE TO THE IDG.
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