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时间:2011-04-20 08:03来源:蓝天飞行翻译 作者:航空
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 (g)  After 30 seconds, make sure the DRIVE light in the L GEN DRIVE DISC switch (P5) is off.
 CAUTION: DO NOT DISCONNECT THE IDG UNLESS THE ENGINE SPEED
_______ IS AT, OR GREATER THAN, IDLE SPEED. THE IDG WILL NOT DISCONNECT FULLY AND DAMAGE TO THE IDG DRIVE GEAR TEETH COULD OCCUR.
 1) If the DRIVE light in the L GEN DRIVE DISC switch (P5)
 comes on, push the L GEN DRIVE DISC switch. 2) Stop the engine (AMM 71-00-00/201). 3) Isolate the problem which caused the DRIVE light to come
 on.
 (h)  
Make sure the yellow OFF light in the L GEN CONT switch (P5) is on.

 (i)  
Push the L GEN CONT switch (P5) to the ON position.

 (j)  
Make sure these lights are off: 1) The OFF light in the L GEN CONT switch (P5). 2) The two BUS OFF lights (P5). 3) The DRIVE light in the L GEN DRIVE DISC switch (P5).

 (k)  
Make sure these indications for the left power channel show on the lower EICAS display: 1) AC-V = 115 |5 2) FREQ = 400 |5


 a) If the frequency is out of the tolerance, adjust the
 IDG.
 3) IDG OUT = 80 |50
 4) IDG RISE = 20 |17

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 (l)  
If the white ON light in the EXT PWR switch (P5) is on, push and release the EXT PWR switch to open the external power contactor. 1) Make sure the white ON light in the EXT PWR switch (P5) is

 off.

 (m)
Push the R GEN CONT switch (P5) to the OFF position.

 (n)  
Push the APU GEN CONT switch (P5) to the OFF position.

 (o)  
Make sure the left and right BUS OFF lights are off.

 (p)  
Push the left BUS TIE switch (P5) to the ISLN (out) position.

 (q)  
Make sure the right BUS OFF light (P5) is on.

 (r)  
Push the left BUS TIE switch (P5) to the AUTO (in) position.

 (s)  
Make sure the right BUS OFF light (P5) is off.


 S 745-033
 (2)  Do the BITE test (AMM 24-11-00/501).
 F. The Load Test
 S 715-037
 (1)  Do the load test:
 (a)  Do these steps until the EICAS display shows the LOAD value of not less than 0.50.
 CAUTION: DO NOT OPERATE THE BOOST PUMPS WITH THE FUEL TANKS EMPTY.
_______
 DAMAGE TO THE BOOST PUMPS CAN OCCUR.

 (b)  
Put these switches on the fuel management control panel (P5) to the ON position: 1) L AFT PUMP 2) L FWD PUMP 3) R AFT PUMP 4) R FWD PUMP 5) LEFT C PUMP 6) RIGHT C PUMP

 (c)  
Put these switches on the hydraulic system control panel (P5) to the ON position: 1) L ELEC HYD PUMP


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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 2) C ELEC 1 HYD PUMP
 3) C ELEC 2 HYD PUMP
 4) R ELEC HYD PUMP

 (d)  
Put These switches on the air conditioning control module (P5) to the ON position. 1) L RECIRC FAN 2) R RECIRC FAN

 (e)  
Make sure these indications for the left power channel show on the lower EICAS display: 1) AV-C = 115 |5 2) FREQ = 400 |5 3) LOAD = 0.50 or larger

 (f)  
Put to the OFF position all the switches put to the ON position in the test.

 (g)  
Push the EXT PWR switch (P5). 1) Make sure the white ON light in the switch comes on. 2) Make sure the yellow OFF light in the L GEN CONT switch


 (P5) is on. 3) Make sure the two BUS OFF lights (P5) are off.
 S 745-034
 (2)  Do the BITE test (AMM 24-11-00/501).
 G.  The Disconnect Test and the Connect Test
 S 715-038
 (1)  Do the disconnect test and the connect test:
 (a)  
AIRPLANES WITH GEN FIELD CONT SWITCHES ON P61 MAINTENANCE PANEL (WDM 24-22-11); Make sure the FIELD OFF light in the switch for the left generator field (P61) is off.


 
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