Aviation safety issues and actions

Information for M18 agricultural operations at weights between 4,200 kg and 5,300 kg

Issue number: AI-2011-150-SI-02
Who it affects: Aerial work industry
Issue owner: Rebel Ag
Transport function: Aviation: General aviation
Background: Investigation Report AI-2011-150
Issue release date: 09 April 2013
Current issue status: Adequately addressed
Issue status justification: The ATSB is satisfied that the proposed safety action will, when implemented, adequately address the 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.

Proactive Action

Action number: AI-2011-150-NSA-034
Action organisation: Rebel Ag
Date: 09 April 2013
Action status: Closed

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.


 

Proactive Action

Action number: AI-2011-150-NSA-036
Action organisation: Civil Aviation Safety Authority (CASA)
Date: 09 April 2013
Action status: Closed

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 comment:

The ATSB is satisfied that the proposed safety action will, when implemented, adequately address the safety issue.

Last update 13 January 2014