Medium large transport aircraft type lost right hydraulic fluid and pressure. Flight crew turned off right hydraulic pump and continued to ewr. Emergency equipment standing by. Normal landing and turn off runway. Ground maintenance found skid plate off left gear door on runway. Aircraft taxied to gate.

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Attributes
ACN	111192
Time
Date	198905
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ewr
State Reference	NJ
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 12000 flight time type : 4500
ASRS Report	111192
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable
Consequence	other Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During a scheduled flight from den to ewr noticed right hydraulic fluid qty go down from 12 qts to 3 qts. Following standard procedures we turned off right engine hydraulic pump and monitored all gauges. After turning off hydraulic pump we noticed right hydraulic qty gauge came back to normal (12 qts). So, we tried turning pump back on and saw the qty drop down to 3 qts again--so again following standard procedures we left the pump off. Contacted maintenance and discussed problem. While making a precautionary VFR landing on runway 04R ewr, left and right pressure was normal but low. Right hydraulic fluid down to 3 qts with gear door open light on. After a safe T/D and emergency equipment standing by, maintenance found skid plate off left gear door where aircraft touched down. After maintenance looked gear over, found no reason not to taxi to gate as normal procedure. Note: after landing and stopping off runway of last high speed, gear doors came up by themselves and gear door open light went out. Also, left hydraulic pressure qty always normal. Right side pressure normal, but low hydraulic fluid qty.

Original NASA ASRS Text

Title: MLG ACFT TYPE LOST RIGHT HYDRAULIC FLUID AND PRESSURE. FLT CREW TURNED OFF RIGHT HYDRAULIC PUMP AND CONTINUED TO EWR. EMERGENCY EQUIPMENT STANDING BY. NORMAL LNDG AND TURN OFF RWY. GND MAINTENANCE FOUND SKID PLATE OFF LEFT GEAR DOOR ON RWY. ACFT TAXIED TO GATE.

Narrative: DURING A SCHEDULED FLT FROM DEN TO EWR NOTICED RIGHT HYD FLUID QTY GO DOWN FROM 12 QTS TO 3 QTS. FOLLOWING STANDARD PROCS WE TURNED OFF RIGHT ENG HYD PUMP AND MONITORED ALL GAUGES. AFTER TURNING OFF HYD PUMP WE NOTICED RIGHT HYD QTY GAUGE CAME BACK TO NORMAL (12 QTS). SO, WE TRIED TURNING PUMP BACK ON AND SAW THE QTY DROP DOWN TO 3 QTS AGAIN--SO AGAIN FOLLOWING STANDARD PROCS WE LEFT THE PUMP OFF. CONTACTED MAINT AND DISCUSSED PROB. WHILE MAKING A PRECAUTIONARY VFR LNDG ON RWY 04R EWR, LEFT AND RIGHT PRESSURE WAS NORMAL BUT LOW. RIGHT HYD FLUID DOWN TO 3 QTS WITH GEAR DOOR OPEN LIGHT ON. AFTER A SAFE T/D AND EMER EQUIP STANDING BY, MAINT FOUND SKID PLATE OFF LEFT GEAR DOOR WHERE ACFT TOUCHED DOWN. AFTER MAINT LOOKED GEAR OVER, FOUND NO REASON NOT TO TAXI TO GATE AS NORMAL PROC. NOTE: AFTER LNDG AND STOPPING OFF RWY OF LAST HIGH SPD, GEAR DOORS CAME UP BY THEMSELVES AND GEAR DOOR OPEN LIGHT WENT OUT. ALSO, LEFT HYD PRESSURE QTY ALWAYS NORMAL. RIGHT SIDE PRESSURE NORMAL, BUT LOW HYD FLUID QTY.

Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.