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After full flap was selected on late final approach, the pilot heard a loud thud, the aircraft pitched nose up and the flaps retracted rapidly. A go around was conducted while the pilot established that the aircraft operated normally, apart from the flaps. A flapless landing was carried out.

Examination of the flap system revealed a failure on the idler gear of the flap drive gearbox. The gearbox had been in service for 12,546 hours, since the aircraft was manufactured. The manufacturer had not specified any inspection schedules, the gearbox being required "on condition".

 
General details
Date: 06 February 1998 Investigation status: Completed 
Time: 1815 CST  
Location   (show map):Darwin Airport Investigation type: Occurrence Investigation 
State: Northern Territory Occurrence type: Flight control systems 
Release date: 29 October 2002 Occurrence class: Technical 
Report status: Final Occurrence category: Incident 
 Highest injury level: None 
 
Aircraft details
Aircraft manufacturer: Cessna Aircraft Company 
Aircraft model: 402 
Aircraft registration: VH-RMI 
Serial number: 402C0408 
Type of operation: Air Transport Low Capacity 
Damage to aircraft: Nil 
Departure point:Garden Point, NT
Departure time:-
Destination:Darwin, NT
Crew details
RoleClass of licenceHours on typeHours total
Pilot-in-CommandCommercial
 
 
 
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Last update 16 November 2015