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757 MAINTENANCE MANUAL
b) AIRPLANES WITH FIELD OFF SWITCHES INSTALLED ON GENERATOR FIELD AND HYDRAULIC CONTROL PANEL; The APU FIELD OFF light (P61).
2) Make sure the indications for the APU power channel show on the lower EICAS display: a) AC-V = 110 to 123
FREQ = 400 | 5 3) Make sure APU GEN OFF does not show on the EICAS display.
(f) AIRPLANES WITH FIELD OFF SWITCHES INSTALLED ON GENERATOR FIELD AND HYDRAULIC CONTROL PANEL; Push the APU GEN FIELD switch (P61) two times. 1) Make sure the FIELD OFF light stays off, after each push.
M. Engine Start with APU Power and Switch Check
S 715-036
(1) Do a check of the switches during the engine start with the APU power:
(a)
Push the APU GEN switch (P5), to the ON position. 1) Make sure the OFF light, in the switch, is off.
(b)
If the white ON light, in the EXT PWR switch (P5), is on, push the EXT PWR switch. 1) Make sure the ON light, in the switch, goes off. 2) Make sure the two BUS OFF lights (P5), are off.
(c)
Push the L (R) UTILITY BUS switches (P5), to the OFF position. 1) Make sure the yellow OFF light in each switch comes on.
(d)
Make sure these indications show on the EICAS display: 1) L UTIL BUS OFF (level C message) 2) R UTIL BUS OFF (level C message)
(e)
Push the L (R) UTILITY BUS switches (P5), to the ON position. 1) Make sure the yellow OFF light, in each switch, goes off. 2) Make sure L UTIL BUS OFF, or R UTIL BUS OFF are not shown.
(f)
Set the COUNTER LIGHT switch on the forward galley switch panel, to ON. 1) Make sure the counter light on the forward galley, is on.
(g)
Set the COUNTER LIGHT switch at aft galley switch panel, to ON. 1) Make sure the counter light on the aft galley, is on.
(h)
Make sure the L (R) GEN CONT switches (P5), are ON. 1) Make sure the yellow OFF light, in each switch, is on.
(i)
Make sure the yellow DRIVE lights in the L (R) GEN DRIVE DISC switches (P5), are on.
(j)
Start the left engine with the APU (Ref 71-00-00).
1) Make sure these results occur for approximately 30 seconds during the left engine start: a) The yellow OFF light in the L (R) UTILITY BUS switches
(P5), come on. b) the counter lights at the forward and the aft galleys, are off. c) The two BUS OFF lights (P5), are off.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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(l)
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One minute after the left engine start, make sure these indications occur: 1) The DRIVE light in the L GEN DRIVE DISC switch (P5), is
off. 2) The Off light in L GEN CONT switch (P5), is off. 3) The two BUS OFF lights (P5), are off. 4) The OFF light in APU GEN switch (P5), is off. 5) The OFF light, in the L (R) UTILITY BUS switches (P5), are
off. 6) The counter lights at the forward and the aft galleys are
on.Push the APU GEN switch (P5), to the OFF position. 1) Make sure the yellow OFF light in the switch, comes on. 2) Make sure these lights are off:
a) The OFF light, in L GEN CONT switch (P5).
b) The two BUS OFF lights (P5).
c) AIRPLANES WITH FIELD OFF SWITCHES INSTALLED ON
GENERATOR FIELD AND HYDRAULIC CONTROL PANEL; The left FIELD OFF light (P61). 3) Make sure the yellow OFF light, in the R GEN CONT switch
(P5), stays on.Push the APU GEN switch (P5), to the ON position. 1) Make sure the OFF light in the switch, goes off. 2) Make sure these lights are off:
a) The OFF light in L GEN CONT switch (P5).
b) The two BUS OFF lights (P5).
c) AIRPLANES WITH FIELD OFF SWITCHES INSTALLED ON
GENERATOR FIELD AND HYDRAULIC CONTROL PANEL; The L (R), and APU FIELD OFF lights (P61). 3) Make sure the yellow OFF light, in the R GEN CONT switch (P5), stays on. 4) Make sure the yellow DRIVE light, in the R GEN DRIVE DISC 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 AMM 飞机维护手册 电源 ELECTRICAL POWER 1(77)
