Re: Noises on some new planes (like ATR and A

Date:         23 Dec 96 22:48:02 
From: (AJHING)
Organization: AOL
References:   1
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The ATR (42 and 72) both have an auxiliary hydraulic pump located in the
area of the landing gear pod.  This is most likely the cause of the
"drill" sound you hear at different times on that aircraft.  Airbus and
ATR  share alot of design, so...