Embraer EMB145 Operation Manual page 295

ON GROUND OPERATIONS
The following recommendations apply to starting and operating
engines on airports where volcanic ash has fallen and ground
contamination is present:
When the airplane is parked install engine covers or reposition
−
the airplane to limit blowing ash accumulation from wind and jet
blasts from other airplane.
During preflight, check that the engine inlet and exhaust areas
−
have been cleared of volcanic ash;
Check that all volcanic ash has been cleaned away from the
−
area within 25 ft of the engine inlets;
− Use APU for engine starting only, not for air conditioning;
Prior to starting, dry motor the engine for one minute in order to
−
blow out any ash that may have entered the engine bypass
duct area;
Use minimum required thrust for breakaway and taxi; Avoid
−
single engine taxi;
Keep bleed valves closed during taxi. Use the cleanest
−
taxiways whenever possible;
Be aware of loose ash being blown by the exhaust wake of
−
other airplane. Maintain adequate ground separation and allow
for dust to set on the runway before starting the takeoff roll;
Use a rolling takeoff technique. Avoid setting high thrust at low
−
airspeeds;
After landing at an airport contaminated with volcanic ash,
−
minimize the use of reverse thrust to prevent any recirculation
ingestion;
Avoid static engine operation above idle;
−
Use APU for engine starting only, not for air conditioning.
−
REVISION 41
AIRPLANE
OPERATIONS
MANUAL
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SUPPLEMENTARY
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ENVIRONMENTAL
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