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.

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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.