Safety issue
| Safety issue description |
Material characteristics of some the LPT blades installed in engine 858322 were consistent with a raw material manufacturing cast that had previously been identified as being susceptible to creep rupture |
|---|---|
| Issue number | AO-2009-069-SI-01 |
| Issue owner | CFM International |
| Transport function | Aviation: Other |
| Date issue released | 20/07/2011 |
Safety action
| Action type | Proactive action |
|---|---|
| Action number | AO-2009-069-NSA-090 |
| Organisation | CFM International |
| Action date | 20/07/2011 |
| Action description |
As a result of this occurrence and at the time of writing this report, the engine manufacturer is revising service bulletin SB 72-1113 to expand the range of blade manufacturing batch numbers that had previously been identified as being predisposed to creep-related failure. Blades in the batches identified in the service bulletin are to be withdrawn from service as soon as they are next removed from the engine. |
| ATSB response |
Adequately addresses the issue until such point as there are more, unrelated occurrenecs. |
| Action status | Closed |