Incident Overview
Date: Thursday 18 September 1997
Aircraft Type: Bell 214B
Owner/operator: Central Helicopter Service
Registration Number: JA9202
Location: Gifu Prefecture –
ÿ Japan
Phase of Flight: Manoeuvring (airshow, firefighting, ag.ops.)
Status: Substantial
Casualties: Fatalities: 0 / Occupants: 2
Component Affected: Spur gear and fuel control unit.Spur gear and fuel control unit.
Investigating Agency: JTSBJTSB
Category: Accident
A helicopter experienced a forced landing due to engine problems, resulting in a rollover. A bevel gear failed due to fatigue caused by a change in spur gear loading, impacting the fuel control unit. Vibration in the accessory gearbox contributed to the failure.A helicopter experienced a forced landing due to engine problems, resulting in a rollover. A bevel gear failed due to fatigue caused by a change in spur gear loading, impacting the fuel control unit. Vibration in the accessory gearbox contributed to the failure.
Description
While manoeuvring the helicopter developed engine problems. during the forced landing it toppled over. Vibration in the accessory gearbox caused a bevel gear to wear. a spur gear, which drives the fuel control unit, failed in fatigue due to the change in the spur gear loading.
Primary Cause
Change in spur gear loading due to a shift in loading caused by engine problems.Change in spur gear loading due to a shift in loading caused by engine problems.Share on:
