6.4
6.4
Condition: Either light illuminated indicates a malfunction in the
related generator drive.
GENERATOR DRIVE
DISCONNECT SWITCH . . . . . . . . . . . . . . . . . . . .DISCONNECT
Hold in the DISCONNECT position momentarily.
[Prevents generator drive damage.]
APU (if available) . . . . . . . . . . . . . . . . . . . . . START & ON BUS
GENERATOR DRIVE LOW OIL PRESSURE
OR HIGH OIL TEMPERATURE
June 3, 2005
737 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
6.5
6.5
Intentionally
Blank
June 3, 2005
737 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
6.6
6.6
Condition: All TRANSFER BUS OFF, BUS OFF and GEN OFF BUS
lights illuminated indicate the loss of both engine
driven generators.
Note: At high altitude, thrust deterioration or engine
flameout may occur.
BUS TRANSFER SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . .OFF
[Prevents high electrical loads during attempts to restore power.]
ELECTRIC HYDRAULIC PUMP SWITCHES . . . . . . . . . . . .OFF
[Prevents high electrical loads during attempts to restore power.]
ENGINE No. 2 GENERATOR SWITCH. . . . . . . . . . . . . . . . . .ON
ENGINE No. 1 GENERATOR SWITCH. . . . . . . . . . . . . . . . . .ON
If either or both BUS OFF lights remain illuminated:
Note: APU start attempts are not recommended above
25,000 feet.
APU (if available) . . . . . . . . . . . . . . . . . . . START & ON BUS
[With both buses off, only one start attempt is recommended. Multiple
start attempts reduce standby power capacity.]
Note: If the APU is the only operating generator, connect
it to the No. 2 bus, as it will power TR No. 3. If the
APU cannot be connected to No. 2 bus, connect it
to No. 1 bus.
Continued on next page
LOSS OF BOTH ENGINE DRIVEN
GENERATORS
June 3, 2005
737 Flight Crew Operations Manual
Copyright © The Boeing Company. See title page for details.
6.7
6.7
Continued from previous page
If either or both BUS OFF lights extinguish:
BUS TRANSFER SWITCH . . . . . . . . . . . . . . . . . . . . . . AUTO
[Restores power to the remaining transfer bus if one BUS OFF light
remains illuminated.]
ELECTRIC HYDRAULIC PUMP
SWITCHES . . . . . . . . . . . . . . . . . . . . . .ON (ONE AT A TIME)
[Prevents high peak electrical loads.]
If both primary attitude displays are inoperative:
IRS MODE SELECTOR SWITCHES . . . . . . . . . . . . . . ATT
Maintain straight and level, constant airspeed flight
until attitude displays recover (approximately 30
seconds).
MAGNETIC HEADING . . . . . . . . . . . . . . . . . . . . . . ENTER
[Heading may be entered on the POS INIT page or on the overhead
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