Safety issue
| Safety issue description |
Jabiru engines manufactured before July 2011 have reduced strength and reliability of the crankshaft/propeller flange joint, compared with the later design that incorporated positive location dowel pins. |
|---|---|
| Issue number | AO-2013-046-SI-01 |
| Issue owner | Jabiru Aircraft Pty Ltd |
| Transport function | Aviation: General aviation |
| Date issue released | 19/08/2014 |
| Issue status justification |
The amendments should ensure the increased reliability of the propeller flange/crankshaft joint and the reduced likelihood of propeller loss due to joint fastener failure. |
Safety action
| Action type | Proactive action |
|---|---|
| Action number | AO-2013-046-NSA-014 |
| Organisation | Jabiru Aircraft Pty Ltd |
| Action date | 19/08/2014 |
| Action description |
The current revision of the Jabiru Engine Overhaul Manual (document JEM0001-6) now includes a strong recommendation that owners update their engines during the next full overhaul or bulk strip, to include propeller flange dowels between the crankshaft and propeller flange - see Appendix A. |
| ATSB response |
The ATSB is satisfied that the action to be taken by Jabiru should reduce the risk of design deficiencies with earlier (pre-engine SN 2446) crankshaft/ propeller flange assemblies. |
| Action status | Closed |