9-1-54. FUEL LOW and FUEL PRESS Cautions.
If the FUEL LOW and FUEL PRESS cautions come on
perform the following:
Failure of main tank fuel boost pumps with
the crossfeed open and a fuel low condi-
tion may result in a dual engine flameout.
Nose low attitude should be avoided.
1. XFEED CLOSED.
2. Land as soon as possible.
9-1-55. Electrical System.
9-1-56. NO. 1 or NO. 2 GEN OFF Caution.
If either an AC or DC system fails with no bus
tie, the hydraulic oil cooler fans will not func-
If any other system caution comes on or a system is lost,
a bus tie does not exist. The primary caution segment
lights to look for in determining whether or not a bus tie
exists are L and R FUEL PRESS NO. 1 and NO. 2 RECT
OFF, and NO. 1 and NO. 2 AFCS OFF.
If no bus tie exists and the failed generator cannot be
Land as soon as possible.
If only the NO. 1 or NO. 2 GEN OFF caution is illuminated,
a bus tie exists.
1. GEN switch OFF RESET, then ON.
If the caution remains on:
2. GEN switch OFF.
3. Land as soon as practible.
9-1-57. NO. 1 and NO. 2 GEN OFF Cautions.
Should both generators fail, both transformer-rectifiers
will also be disabled. This condition will be indicated by
loss of both AFCS (which can result in abrupt attitude
changes) the lighting of both AFCS, OFF, GEN OFF, and
RECT OFF caution. Since there will be a loss all primary
attitude, instrument, navigation and stabilization sys-
tems, the primary concern is to land as soon as possible
and the secondary concern is to restore electrical power.
The only electrical power available will be 24-volt DC
from the battery.
If both generators fail, the main tank boost
pumps will be inoperative. If flight is con-
ducted above 6,000 feet PA, descend be-
low 6,000 feet PA as soon as possible to
avoid a dual engine flameout. If applicable,
reduce airspeed to 100 KIAS or Vne,
whichever is slower. 712 Also all normal
beep trim functions will be inoperative.
The control of engine RPM will be accom-
plished via the EMER ENG TRIM 1 and 2
switches. LCT and DASH actuators will
remain programmed at the airspeed at
which the generators failed.
1. Land as soon as possible.
EMER ENG Trim Adjust.
If unable to land proceed as follows:
1. Airspeed below 100 KIAS.
2. Altitude below 6,000 feet PA.
3. AFCS OFF.
4. PDPs Check circuit breakers and place
gang bars down.
5. Each GEN switch OFF RESET, then ON.
Electrical power is restored (from either generator):
Land as soon as possible
Electrical power is not restored.
1. APU Start.
2. APU GEN ON.
3. Land as soon as possible.
9-1-58. No. 1 or No. 2 RECT OFF Caution.
If a DC bus-tie does not occur (No. 2 Rect Off),
power to open the cargo hooks in normal
mode is not available and the associated hy-
draulic cooler fan will not function. Other cau-
tions will be on, such as L FUEL PRESS (if
crossfeed valves are closed).
DC bus tie has not occurred:
Land as soon as possible.
DC bus tie has occurred (only the RECT OFF caution will
1. PDPs Check.
2. Land as soon as practicable.