Service difficulty report · O-Ring · Gulstm GIV

Difficulty date
July 2, 2011
Submitted
July 5, 2011
Operation
Air carrier
Aircraft
N492QS
Make and model
Gulstm GIV
Aircraft serial
1392
Aircraft time
9,533 hours, 4,632 cycles
Part
O-Ring
Part number
NAS161212A
Condition
Worn
Location
Hyd System
Stage of operation
CR
How discovered
O
Nature of condition
K, J
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LOSS OF FLUSH HYD FLUID IN FLIGHT. FLUID IS LEAKING OUT OF RT ENGINE. INSPECTED RT ENGINE FOR HYD LEAKS AND FOUND A LEAK AT THE HYD PUMP LEAK WAS COMING FROM BETWEEN HYD PUMP AND ATTENUATOR. UPON FURTHER INSPECTION, FOUND O-RING FOR ATTENUATOR WORN AND THAT THE ATTENUATOR WAS NOT TIGHTEN DOWN SECURELY. R & R O-RING FOR ATTENUATOR AND SECURED ATTENUATOR TO PUMP. SERVICED HYD AND PERFORMED A LEAK CHECK. NO HYD LEAKS FOUND. REF GIV MM 29-10-00.