Safety issue
| Safety issue description |
There was a potential, depending on the supplements that were incorporated in an aircraft’s flight manual, for pilots and/or operators to apply incorrect operational limitations to agricultural operations in M18 and M18A Dromader aircraft at weights between 4,200 kg and 5,300 kg. This increased the risk of their inconsistent application to these operations, and the likelihood of the unknowing erosion of engineering safety margins and aircraft life. |
|---|---|
| Issue number | AI-2011-150-SI-02 |
| Issue owner | Rebel Ag |
| Transport function | Aviation: General aviation |
| Date issue released | 09/04/2013 |
| Issue status justification | The ATSB is satisfied that the proposed safety action will, when implemented, adequately address the safety issue. |
Safety action
| Action type | Proactive action |
|---|---|
| Action number | AI-2011-150-NSA-034 |
| Organisation | Rebel Ag |
| Action date | 09/04/2013 |
| Action description |
The owner and developer of Supplemental Type Certificate (STC) SVA521 reported that pending Civil Aviation Safety Authority (CASA) approval, they were in the process of amending it to clarify the applicability of aircraft flight manual limitations for operations between 4,200 kg and 5,300 kg.
|
| Action status | Closed |
Safety action
| Action type | Proactive action |
|---|---|
| Action number | AI-2011-150-NSA-036 |
| Organisation | Civil Aviation Safety Authority (CASA) |
| Action date | 09/04/2013 |
| Action description |
CASA advised that it will ensure that the applicant and their engineering organisation amends the SVA521 AFM supplement to include data covering all Restricted Category operations up to 6,600 kg (that is, from 4,200 kg to 6,600 kg). This will obviate the need for multiple AFM supplements and simplify the AFM overall, thus improving safety. |
| ATSB response |
The ATSB is satisfied that the proposed safety action will, when implemented, adequately address the safety issue. |
| Action status | Closed |