B727 hydraulic pump casing cracks causing loss of fluid and return to departure station.

Attributes
ACN	463039
Time
Date	200002
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mia.airport
State Reference	FL
Altitude	msl bound lower : 500 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mia.tracon tower : mia.tower
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier government : faa
Function	controller : departure controller : approach flight crew : first officer
Qualification	controller : radar pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 8600 flight time type : 3800
ASRS Report	463039
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 6000 flight time type : 3000
ASRS Report	463037
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : declared emergency flight crew : diverted to another airport
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

After takeoff on runway 9L at mia, after the gear and flaps were retracted, both 'B' pump pressure low lights illuminated and the system 'B' quantity also fell to zero gallons in the reservoir. We notified mia departure of a hydraulic problem and leveled off at 4000 ft MSL and ran the cockpit operating manual procedure for total loss of 'B' hydraulic system. We climbed to 6000 ft about 15-20 mi east of mia and dumped approximately 16000 pounds of fuel to get down to the maximum landing weight. We configured and flew airspds according to the manual and landed uneventfully at mia. Supplemental information from acn 463037: system 'a' was pwring brakes and we returned to the gate. On further investigation, 'B' pump casing was found to have split, thus pumping all system 'B' fluid out.

Original NASA ASRS Text

Title: B727 HYD PUMP CASING CRACKS CAUSING LOSS OF FLUID AND RETURN TO DEP STATION.

Narrative: AFTER TKOF ON RWY 9L AT MIA, AFTER THE GEAR AND FLAPS WERE RETRACTED, BOTH 'B' PUMP PRESSURE LOW LIGHTS ILLUMINATED AND THE SYS 'B' QUANTITY ALSO FELL TO ZERO GALLONS IN THE RESERVOIR. WE NOTIFIED MIA DEP OF A HYD PROB AND LEVELED OFF AT 4000 FT MSL AND RAN THE COCKPIT OPERATING MANUAL PROC FOR TOTAL LOSS OF 'B' HYD SYS. WE CLBED TO 6000 FT ABOUT 15-20 MI E OF MIA AND DUMPED APPROX 16000 LBS OF FUEL TO GET DOWN TO THE MAX LNDG WT. WE CONFIGURED AND FLEW AIRSPDS ACCORDING TO THE MANUAL AND LANDED UNEVENTFULLY AT MIA. SUPPLEMENTAL INFO FROM ACN 463037: SYS 'A' WAS PWRING BRAKES AND WE RETURNED TO THE GATE. ON FURTHER INVESTIGATION, 'B' PUMP CASING WAS FOUND TO HAVE SPLIT, THUS PUMPING ALL SYS 'B' FLUID OUT.

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.