Safety issue

Safety issue description

The proximity of the landing gear selector valve electrical wiring loom to the external hydraulic power connectors within the left engine nacelle on Fairchild SA227-AT Metro aircraft resulted in the ‘down selection’ wire being damaged during routine maintenance activities.
Issue number AO-2012-024-SI-01
Issue owner Elbit Systems of America
Transport function Aviation: Other
Date issue released 29/09/2014
Issue status justification

The ATSB is satisfied that the action by Elbit Systems of America to re-route the landing gear selector valve electrical wiring loom in the worldwide fleet of Metro aircraft, and advise operators of this new requirement will, when implemented across the fleet, minimise the risk of damage to the wires during routine maintenance. The proactive safety action by Toll Aviation Pty Ltd pre-empts this action.

Safety action

Action type Proactive action
Action number AO-2012-024-NSA-036
Organisation Elbit Systems of America
Action date 29/09/2014
Action description

Elbit Systems of America advised that, as a result of this occurrence, re-routing of the landing gear selector valve electrical wiring loom in the worldwide Metro aircraft fleet has been implemented. A Metro Global advisory publication has also been distributed to all Metro operators advising the new routing requirements.
ATSB response

The ATSB welcomes the action by Elbit Systems of America to re-route the landing gear selector valve electrical wiring loom in Metro aircraft and advise operators of this new requirement.
Action status Closed

Safety action

Action type Proactive action
Action number AO-2012-024-NSA-037
Organisation Toll Aviation Pty Ltd
Action date 29/09/2014
Action description

As a result of this occurrence, Toll Aviation Pty Ltd re-routed the landing gear selector valve electrical wiring loom within the left nacelle of its Metro III/23 aircraft to minimise the risk of damage to the wires during routine maintenance.
ATSB response

The ATSB acknowledges the action taken by Toll Aviation Pty Ltd to re-route the landing gear selector valve electrical wiring loom within the left nacelle of its Metro III/23 aircraft, reducing the risk of damage to these wires during routine maintenance.
Action status Closed