JS-MD 3
Aircraft Flight Manual
MD10-AFM-00-001
Issue: 01
Rev. 00
Rev. Date: 14-Feb-20
Page 2
–17
Temperature restrictions when carrying water
Flights with water ballast are prohibited in conditions where there is a risk
of icing. When the outside air temperature is below 0 °C (32 °F), the
water ballast must be dumped or a descent to lower altitudes (higher
temperatures) must be conducted. Flying in temperatures below freezing
with water in the non-expendable tank is not allowed.
WARNING:
Icing water ballast may cause structural damage to the
wing and fin structures. Avoid flying in icing conditions,
or storage of the aircraft with the water tanks filled.
WARNING:
Dumped water may freeze at the valve outlets at outside
temperature well above the freezing point.
CAUTION:
Currently no additives (e.g. anti-freeze) are approved to
lower the water freezing point.
Limitations while dumping water ballast
Dumping the water ballast takes approximately five minutes. While
dumping, the fuselage static ports may get temporarily blocked by water
entering the static ports. This may cause the airspeed indicator to give
incorrect readings during descent. These erroneous readings may
continue until the main tanks are empty.
CAUTION:
Avoid high speed flying (within 30 km/h / 16 kts of limit
speeds) when the water ballast is being dumped.
Monitor the approach speed and approach angle as the
actual approach speed may be indicated incorrectly. It is
recommended to change to the alternate static port (if
fitted) while dumping water.
CAUTION
:
Ensure the water in the main tanks is dumped before
dumping water from the tip tanks.
