QantasLink Dash 8 Q400 landing in Townsville

VH-QOK QantasLink Dash 8 landing in Townsville as QF2355. That whine/grinding noise you can hear is the PTU gear driven pump powered by hydraulic pressure from number 1 system, which pressurizes the number two system if its electric hydraulic pump fails.
and if you look closely on landing, you'll see a Royal New Zealand Air Force P-8 Posiedon.
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