In this Month's issue...
Hartzell Propeller has discovered that some B-119-2 diaphragms, installed on Hartzell propeller models HC-12(X or V)20-7, HC-12(X or V)20-8, HC-D2(X, V or MV)20-7 or HC-D2(X, V or MV)20-8 propellers may fail in operation. These propeller models are commonly known as “diaphragm props” and are installed primarily on Continental E-185, E-205 and E-225 engines.
Failure of this part can result in complete loss of engine oil, rapid engine shutdown, and cause oil to cover the windscreen, significantly reducing visibility.
Hartzell Propeller has written an Alert Service Bulletin addressing this issue. It is available on our website at http://www.hartzellprop.com/service_support.php?id=80 Click on HC-ASB-61-338 at the bottom of the list. We believe FAA is considering publication of an Airworthiness Directive that will support the Service Bulletin.
Please note that per the Service Bulletin, Hartzell Propeller Inc. will provide one B-119-2 diaphragm and labor coverage of 4 man hours at $75.00 per hour for replacement of an affected B-119-2 diaphragm.
If you have any additional questions, or if I can be of further assistance, please feel free to contact me at your convenience.
Kevin M. Ryan
Product Support Representative
Hartzell Propeller Inc.