Safety issue
| Safety issue description |
The procedures in the aircraft maintenance manual relating to chip detector debris analysis were written in a way that could cause confusion and error. This probably influenced the actions of the maintenance personnel to release the aircraft to service with a deteriorating bearing. |
|---|---|
| Issue number | AO-2018-049-SI-01 |
| Issue owner | Pratt & Whitney Canada |
| Transport function | Aircraft Maintenance |
| Issue status | Closed – Adequately addressed |
| Date issue released | 16/09/2020 |
| Issue status justification |
The ATSB is acknowledges that the changes made to the procedures have clarified the ambiguities in the actions to be taken when debris is detected on the turbomachinery chip detector. As such, the ATSB is satisfied the safety issue has been addressed. |
Safety action
| Action type | Safety recommendation |
|---|---|
| Action number | AO-2018-049-SR-050 |
| Organisation | Pratt & Whitney Canada |
| Action date | 16/09/2020 |
| Action description |
The Australian Transport Safety Bureau recommends that Pratt & Whitney Canada takes safety action to improve the clarity of procedures within the chip detector debris analysis section of the aircraft maintenance manual. |
| Action status | Closed |
Organisation response
| Date received | 23/09/2021 |
|---|---|
| Organisation | Pratt & Whitney Canada |
| Response status | Closed |
| Response text |
Pratt & Whitney Canada advised that the procedures within the chip detector debris analysis section have been clarified to remove the ambiguity on what actions should be taken in response to debris being detected on the chip detector. |
| ATSB response |
The ATSB agrees that the changes made to the procedures have clarified the actions to be taken in response to the detection of debris on the chip detector. Given the effectiveness of the provided safety action, the safety recommendation and the associated safety issue are considered ‘Closed – Adequately addressed’. |
| ATSB response date | 20/10/2021 |