AIRPLANE
OPERATIONS
MANUAL
SUPPLEMENTARY
P
ROCEDURES
ENVIRONMENTAL
REVISION 41
1-02-79
Page
3
Code
01
Copyright © by Embraer. Refer to cover page for details.
INTERNAL SAFETY INSPECTION
Batteries........................................................................ CHECKED
If battery voltage is below 24 V and battery temperature is colder
than -15°C (5°F), replace the battery, as it may not recharge under
very low temperatures.
APU............................................................................... START
Observe fuel and oil limitations before APU starting. Minimum fuel
temperature is -40°C (-40°F). Minimum MIL-L-23699 oil
temperature is -43°C (-45°F). Minimum MIL-L-7808 oil temperature
is -54°C (-65°F).
Minimum battery temperature to start the APU is -20°C (-4°F).
Minimum temperature to start APU using external electrical power
is -54°C (-65°F).
If APU cannot be started, apply heat from a ground cart directly into
the APU compartment. Do not allow the hot air from the ground
heating cart to exceed 100°C (212°F), as it may damage the
components inside the compartment.
Observe RPM and EGT during starting. If the APU flames out,
make sure that ice or snow deposits are cleared before attempting
a second start.
After the APU has been started, RPM and EGT fluctuation may be
an indication of fluid ingestion into the APU. Record any
discrepancy in the logbook.
Air Conditioning ............................................................ SET
Turn both air conditioning packs on, bleeding air from the APU (or
from a ground conditioned air cart, with packs off) to warm up the
interior of the airplane. The warm-up should be accomplished with
all doors closed, if possible.
Turn recirculation fans on.
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