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7.12.2 Emergency-air shutoff flaps – Functional check with electric actuation
DANGER
Rotating and moving engine parts.
Risk of crushing, danger of parts of the body being caught or pulled in!
• Before cranking the engine with starter system, make sure that there are no persons in the en-
gine's danger zone.
WARNING
Hot components/surfaces.
Risk of burns!
• Allow the engine to cool down to below 50 °C before beginning work.
• Wear suitable protective equipment/thermal gloves.
• Avoid unprotected contact with hot surfaces.
WARNING
Air flaps close abruptly.
Risk of injury!
• Before actuating, ensure that nobody is in the danger zone.
WARNING
High level of engine noise when the engine is running.
Risk of damage to hearing!
• Wear ear protectors.
Note:
In order not to compromise the engine, reduce the overspeed limit value for the functional check.
Option 1: Check function while
engine is running
1.
Check both emergency-air shutoff flaps
and their wiring for mechanical damage.
2.
Make sure that the pointers (1) of both
emergency-air shutoff flaps are pointing to
OPEN / ON and the emergency-air shutoff
flaps are open.
3.
Start engine (→ Page 36).
4.
Reduce the overspeed limit.
5.
Run up the engine without a load.
6.
Check the following functions:
• Close both emergency-air shutoff flaps,
at latest when a speed of approx.
900 rpm is reached.
• The emergency-air shutoff flaps are
completely closed and the pointers (1)
point to CLOSED / OFF.
Result:
If one or both emergency-air shutoff flaps
is not fully closed or not closed at all, shut
down the engine and contact Service. Ob-
serve fault message (Error Log) if applica-
ble.
7.
After the functional check, open the emer-
gency-air shutoff flaps manually so that the
pointer (1) are at OPEN / ON.
8.
Reactivate the system electrically (depend-
ing on installation).
118 | Task Description | MS150096/03E 2015-04
TIM-ID: 0000018646 - 006