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Uncommanded movement of the throttle lever


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Please i need help.

We recently encountered an uncommanded movement of the #4 engine throttle lever from ground idle to just before the gate of flight idle. We checked and confirmed that the cable tension is ok. We also cleaned and greased all bell-cranks. Yet,  the problem persists. Once the throttle is moved from the ground idle, it creeps forward until it reaches the gate of flight idle. Any advise would be appreciated. Thanks.

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7 minutes ago, NATOPS1 said:

May sound silly but have you checked the friction lock on the throttles? 

May b but do u think friction lock is the problem??? Bcoz friction lock works for all throttles not for individual throttle lever.... So i dont think that friction lock would b the problem.... 

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Just now, Moeed hassan said:

May b but do u think friction lock is the problem??? Bcoz friction lock works for all throttles not for individual throttle lever.... So i dont think that friction lock would b the problem.... 

I think I would make sure before I task my maintenance with two engine changes.

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On 10/21/2018 at 3:15 PM, NATOPS1 said:

I think I would make sure before I task my maintenance with two engine changes.

Hello NATOPS. Surprisingly,  the throttle creeping has stopped after we swapped the engines. The aircraft has been scheduled to go for functional check flight. I will let you know the outcome of the FCF. Thanks. 

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