Specifications

DCS

[P-51D Mustang]

136

EMERGENCY PROCEDURES

Engine Emergencies

Engine Overheating

Engine overheating can be recognized by one or more of the following effects: coolant relief valve

pop-off, maximum coolant temperature being exceeded, or white smoke coming from the exhaust

stacks. An engine overheating in flight is likely caused by one of the following:

 You have been climbing at high power and below recommended airspeed. In other words, the

air blast in the air scoop is insufficient. To remedy this problem, level out, reduce power and

increase airspeed.

 The automatic shutter controls not functioning properly. In this case, operate the shutters

manually by means of the toggle switch control, and watch the instruments to see if the

condition has been remedied.

 The oil supply is depleted. This situation may be discovered by reading the oil pressure gauge.

The engine will continue to overheat even after the shutters are opened all the way. There is no

fix for this problem, so maintain the RPM and power as low as possible and land as soon as

possible.

 The coolant supply is depleted. The engine will continue to overheat even after the shutters are

opened all the way. There is no fix for this problem, so maintain the RPM and power as low as

possible and land as soon as possible. You may only have about 10 minutes before the engine

fails.

 The engine’s operating limits have been exceeded. Make sure the carburetor air control is set to

RAM AIR, depending on the type of equipment. Check the mixture control to see that is set to

RUN or AUTO RICH.

If conditions are favorable for a dead-stick landing and overheating persists, consider the possibility

of shutting down the engine prior to landing.

Engine Failure

Engine failures fall into two main categories: those occuring instantly and those giving ample

warning. The instant failure is rare and usually occurs only if ignition or fuel flow completely fails.

Most engine failures are gradual and afford the alert pilot ample indication that a failure may be

approaching. An extremely rough-running engine, loss of oil pressure, excessive coolant temperature

under normal flight conditions, loss of manifold pressure, and fluctuating RPM are indications that a

failure may occur. When indications point to an engine failure, the pilot should land immediately.