Service difficulty report · O-Ring · Gulstm 200

Difficulty date
August 19, 2015
Submitted
August 26, 2015
Operation
Air carrier
Aircraft
N789SB
Make and model
Gulstm 200
Aircraft serial
146
Aircraft time
1,567 hours, 1,431 cycles
Part
O-Ring
Condition
Leaking
Location
Hydraulic Sys
Component
Hyd Reserv Cap
Component part number
NAS1611222
Stage of operation
CR
How discovered
O
Nature of condition
K, J
Precautionary procedure
B

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

What was found

EN-ROUTE A CAS MSG APPEARED THAT READ, R HYD LEVEL LOW. FOLLOWING THE QRH, WE BEGAN TO MONITOR THE RT HYD FLUID LEVEL, WHICH AT THE TIME WAS 28. IT WAS DECIDED THAT IF THE LEVEL CONTINUED TO DROP, OR IF THE PRESS STARTED TO FLUCTUATE, TO LAND AS SOON AS POSSIBLE & IF THE LEVEL STABILIZED, TO LAND FOR MX. THE RT FLUID LEVEL EVENTUALLY STABILIZED AT 24. THE RT HYD PRESS STARTED TO FLUCTUATE FROM 900 PSI TO 3000 PSI & THE AUXILIARY PUMP AUTOMATICALLY CAME ON. WE DECLARED AN EMER & WERE CLEARED DIRECT. AFTER CONFIGURING EARLY, WE REQUESTED EMER EQUIP & A TOW TRUCK TO STAND BY. THE LANDING WAS NORMAL & WE TERMINATED THE EMER.