There are many reasons that your TFE731 engine may be leaking oil. The hardest part is determining where it is leaking and what to do about it. The following is a list of the most commen places you will find oil leaks and their causes.
If there is oil leaking from the BPV after the engine has been shutdown and idle for a day or so, the oil tank may have a cracked internal tube that is allowing oil to flow out of the tank and into the accessory gearbox. When the accessory gearbox is full, the oil will begin to run out the BPV.
If your engine has just come out of its Compressor Zone Inspection (CZI) however, verify that oil pump P/N 3060785-XX is installed. Oil gets trapped in the oil coolers or other areas and moves through the oil pump, filling the accessory gearbox and eventually leaking out of the BPV. This happens on the RH engine installations and sometimes on the #2 position on the F50/900s.
If oil begins to pool in the exhaust nozzle area after engine shutdown, the cause may be one of the following:
There are several reasons that oil will leak into the Fan Inlet Area. Here are some of the more common:
If oil is leaking from the hot end, it might be one of the following:
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