B727-200 crew had hydraulic 'B' pump failure in mia class B airspace.

Attributes
ACN	534686
Time
Date	200201
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mia.airport
State Reference	FL
Altitude	msl single value : 6000
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 : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	534686
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : diverted to another airport none taken : detected after the fact other
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Air interrupt. Climb out of 6000 ft, loss of 'B' system pressure and subsequent loss of #1 'B' pump. Minimum level of 'B' system maintained with second pump. ATC advised of problem, fuel dump and return mia with precautionary flap 30 degree landing runway 27L. No emergency declared and approach/landing were normal. Fuel dump complicated by fail of #1 tank nozzle, but corrected with burn balancing.

Original NASA ASRS Text

Title: B727-200 CREW HAD HYD 'B' PUMP FAILURE IN MIA CLASS B AIRSPACE.

Narrative: AIR INTERRUPT. CLBOUT OF 6000 FT, LOSS OF 'B' SYS PRESSURE AND SUBSEQUENT LOSS OF #1 'B' PUMP. MINIMUM LEVEL OF 'B' SYS MAINTAINED WITH SECOND PUMP. ATC ADVISED OF PROB, FUEL DUMP AND RETURN MIA WITH PRECAUTIONARY FLAP 30 DEG LNDG RWY 27L. NO EMER DECLARED AND APCH/LNDG WERE NORMAL. FUEL DUMP COMPLICATED BY FAIL OF #1 TANK NOZZLE, BUT CORRECTED WITH BURN BALANCING.

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.