Service difficulty report · Pump · Gulstm GIV

Difficulty date
December 21, 2010
Submitted
December 23, 2010
Operation
Air carrier
Aircraft
N472QS
Make and model
Gulstm GIV
Aircraft serial
1326
Aircraft time
10,026 hours, 4,910 cycles
Engine
Rroyce TAY6118
Part
Pump
Part number
1159SCH20041
Part serial
K0224
Condition
Leaking
Location
Hyd System
Stage of operation
DE
How discovered
O
Nature of condition
K, J
Precautionary procedure
O

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

What was found

PASSING 15000 FT ON DECENT THE "CHECK HYD QUANTITY" MESSAGE ILLUMINATED AND HYD SYNOPSIS PAGE SHOWED THE FLIGHT HYD SYS QUANTITY OF ZERO. ABOUT 1 MINUTE LATER THE FLIGHT HYD PRESSURE DECREASED TO 0. AND THE FLT HYD FAIL MESSAGE ILLUMINATED. RAN APPROPRIATED CHECKLISTS AND LANDED UNEVENTALLY WITHOUT DECLARING AN EMERGENCY NO PAX WERE ON BOARD. CLEANED RT ENGINE & WING. FOUND RT ENGINE HYD PUMP WAS SOURCE OF LEAK. R & R RT ENGINE HYD PUMP IAW 29-10-46. SERVICED FLIGHT RESERVOIR IAW CMP 29-10-57. PERFORMED HYD POWER SYS OPS TEST IAW CMP29-00-05. ALL TESTS PASS . RT ENGINE HYD PUMP LEAK AND OPS CHECKED GOOD.