757 AMM 飞机维护手册 电源 ELECTRICAL POWER 1(73)

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757 MAINTENANCE MANUAL
 G.  AIRPLANES WITH FIELD OFF SWITCHES INSTALLED ON GENERATOR FIELD AND HYDRAULIC CONTROL PANEL; Field Control Relay, for the L(R) IDG
 S 715-029
 (1)  Do a check of the field control relay for the L(R) IDG:
 (a)  
Push the L GEN CONT switch (P5) to the OFF position. 1) Make sure the yellow OFF light in the switch, stays on. 2) Make sure the white L FIELD OFF light (P61) is on.

 (b)  
Push the R GEN CONT switch (P5) to the OFF position. 1) Make sure the yellow OFF light in the switch stays on. 2) Make sure the white R FIELD OFF light (P61) is on.

 (c)  
Make sure the ELEC/HYD page shows on the bottom EICAS display.

 (d)  
Make sure these indications show on the lower EICAS display:

 1)  For the left power channel,
 AC-V = 0
 FREQ = 0.

 2)  For the right power channel,
 AC-V = 0
 FREQ = 0.

 (e)  
Push the L GEN FIELD switch (P61). 1) Make sure the L FIELD OFF light in the switch goes off.

 (f)  
Make sure the yellow OFF light in the L GEN CONT switch (P5) is on.

 (g)  
Make sure these indications show on the lower EICAS display:

 1)  For the left power channel,
 AC-V = 115 | 5
 FREQ = 400 | 5.

 2)  For the right power channel,
 AC-V = 0
 FREQ = 0.

 (h)  
Push the R GEN FIELD switch (P61). 1) Make sure the OFF light, in the switch, goes off.

 (i)  
Make sure the yellow OFF light, in the R GEN CONT switch (P5), is on.

 (j)  
Make sure these indications show on the lower EICAS display:

 1)  For the left power channel,
 AC-V = 115 | 5
 FREQ = 400 | 5.

 2)  For the right power channel,
 AC-V = 115 | 5
 FREQ = 400. | 5

 (k)  
Push the L GEN FIELD switch (P61).

 1)  Make sure the white FIELD OFF light, in the switch, comes on.

 (l)  
Make sure the yellow OFF light, in the L GEN CONT switch (P5), stays on.

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 24-22-00
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A

757
MAINTENANCE MANUAL

 (m)  Make sure these indications show on the lower EICAS display:
 1)  For the left power channel,
 AC-V = 0
 FREQ = 0.

 2)  For the right power channel,
 AC-V = 115 | 5
 FREQ = 400 | 5.

 (n)  
Push the R GEN FIELD switch (P61).

 1)  Make sure the white FIELD OFF light, in the switch, comes on.

 (o)  
Make sure the yellow OFF light, in the R GEN CONT switch (P5), stays on.

 (p)  
Make sure these indications show on the lower EICAS display:

 1)  For the left power channel,
 AC-V = 0
 FREQ = 0,

 2)  For the right power channel,
 AC-V = 0
 FREQ = 0.

 (q)  
Push the R GEN CONT switch (P5), to the ON position. 1) Make sure the OFF light, in the switch, goes off. 2) Make sure the R FIELD OFF light (P61), is off.

 (r)  
Push the R GEN FIELD switch (P61), two times.

 1)  Make sure the FIELD OFF light, stays off, after each time the switch is pushed.

 (s)  
Push the R GEN CONT switch (P5), to the OFF position. 1) Make sure the yellow OFF light, in the switch, comes on.

 (t)  
Push the L GEN CONT switch (P5), to the ON position. 1) Make sure the OFF light, in the switch, goes off.

 (u)  
Make sure the L FIELD OFF light (P61), is off.

 (v)  
Push the L GEN FIELD switch (P61),two times.

 1)  Make sure the FIELD OFF light stays off, each time the switch is pushed.

 (w)  
Push the L GEN CONT switch (P5), to the OFF position. 1) Make sure the yellow OFF light, in the switch, comes on.

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 24-22-00
　
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