T.O. BMS1F-16CM-1 BMS 4.34 Change 2.00
BMS 4.34 Dash 1
© Red Dog 2012-2019 Page: 192
3.2.5. HYD/OIL PRESS
This warning light indicates a low pressure condition in one or both hydraulic systems,
or a low engine oil pressure condition. Both systems therefore need to be checked.
1. Check the oil pressure gauge. If the pressure reads normal the problem is not the
oil pressure. If the pressure is below 15 psi the engine has low oil pressure. Limit
throttle movement and land as soon as possible. Refer to 3.7.11 Oil Leak in the in-
flight emergency paragraph later this section. If on the ground, shut down the engine immediately and
let the RPM decrease below 20% before attempting a restart. Refer to 3.5.4 OIL PRESSURE.
2. Refer to the hydraulic system A & B gauges on the right auxiliary console and check pressure there.
If only system A is below 1000 psi there is a single system A hydraulic failure (refer to System A
Hydraulic failure in the EP checklists).
If the system B gauge is under 1000 psi, check the EPU:
- If the EPU RUN light is off there is a single system B hydraulic failure (refer to System B
Hydraulic failure in the EP checklists).
- If the EPU run light is on check the ELEC SYS caution light:
- If ELEC SYS light is on the problem is PTO shaft failure.
- If ELEC SYS light is off both hydraulic system A & B have failed (refer to Dual
Hydraulic failure in the EP checklists).
If both hydraulic indicators show less than 1000 psi with the EPU switch in NORM or running, the
aircraft has suffered a total hydraulic failure and will become uncontrollable as soon as the EPU fuel
runs out. If you can’t land before that happens you will have no choice but to eject.
3.2.6. OXY LOW
The OXY LOW warning light illuminates when the OBOGS BIT has detected a fault or
when regulator pressure is below 5 psi. Refer to OBOGS malfunction.
3.2.7. DBU ON
The DBU ON warning light illuminates whenever the FLCC is running in digital backup
mode. This is eye candy in BMS and happens only when the DBU is tested.
3.2.8. TF FAIL
Indicates a Terrain Following Radar failure. An immediate climb to a minimum safe
altitude should be initiated.
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