MD88 flight crew experiences a low hydraulic quantity problem, which led to a manual gear extension and an emergency landing.

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Attributes
ACN	574661
Time
Date	200302
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 7000
Environment
Flight Conditions	VMC
Weather Elements	Rain Windshear
Light	Night
Aircraft 1
Controlling Facilities	tracon : zzz.tracon tower : zzz.tower
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : atp pilot : commercial pilot : flight engineer
Experience	flight time last 90 days : 210 flight time total : 5700 flight time type : 300
ASRS Report	574661
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : hyd quantity gauge other flight crewa other flight crewb
Resolutory Action	flight crew : landed in emergency condition flight crew : declared emergency
Consequence	other Other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Right hydraulic quantity decreased to a low level on climb out from ZZZ. Followed procedure in operations manual. (Turned off pumps.) on descent/approach, per procedure, turned the pumps back on and attempted to 'dirty' up the aircraft. Slats/flaps extended, but the gear did not. Followed manual gear extension and advised tower we would need to be towed off the runway. Landing uneventful, however, we blocked the runway for 20 mins while emergency and maintenance personnel cleared the aircraft for taxi.

Original NASA ASRS Text

Title: MD88 FLT CREW EXPERIENCES A LOW HYD QUANTITY PROB, WHICH LED TO A MANUAL GEAR EXTENSION AND AN EMER LNDG.

Narrative: R HYD QUANTITY DECREASED TO A LOW LEVEL ON CLBOUT FROM ZZZ. FOLLOWED PROC IN OPS MANUAL. (TURNED OFF PUMPS.) ON DSCNT/APCH, PER PROC, TURNED THE PUMPS BACK ON AND ATTEMPTED TO 'DIRTY' UP THE ACFT. SLATS/FLAPS EXTENDED, BUT THE GEAR DID NOT. FOLLOWED MANUAL GEAR EXTENSION AND ADVISED TWR WE WOULD NEED TO BE TOWED OFF THE RWY. LNDG UNEVENTFUL, HOWEVER, WE BLOCKED THE RWY FOR 20 MINS WHILE EMER AND MAINT PERSONNEL CLRED THE ACFT FOR TAXI.

Data retrieved from NASA's ASRS site as of July 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.