A B727 on approach to atl has a 'B' system hydraulic problem.

Attributes
ACN	426409
Time
Date	199901
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : atl
State Reference	GA
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Route In Use	arrival other enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : instrument pilot : cfi pilot : commercial pilot : flight engineer
Experience	flight time last 90 days : 180 flight time total : 4500 flight time type : 1000
ASRS Report	426409
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	other other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

On vectors for approach into atl. Gear up and flaps 25 degrees, system B pump #2 low pressure light came on. We did the 'system B pump low pressure light' abnormal procedure. All hydraulic quantities and pressure indicating normal with the #2 B pump off. Now on final for runway 26R into atl. Low pressure light came on for the one remaining B pump #1. Accomplished the 'hydraulic leak or loss' abnormal procedure from our pom. Asked approach for permission to go missed approach while we worked on our problem. Hydraulic quantities still normal, but no system B pressure. Accomplished the 'system B leak or loss follow-up' procedure. Vectored back in to land in atlanta. Landed uneventfully and parked the airplane at the gate.

Original NASA ASRS Text

Title: A B727 ON APCH TO ATL HAS A 'B' SYS HYD PROB.

Narrative: ON VECTORS FOR APCH INTO ATL. GEAR UP AND FLAPS 25 DEGS, SYS B PUMP #2 LOW PRESSURE LIGHT CAME ON. WE DID THE 'SYS B PUMP LOW PRESSURE LIGHT' ABNORMAL PROC. ALL HYD QUANTITIES AND PRESSURE INDICATING NORMAL WITH THE #2 B PUMP OFF. NOW ON FINAL FOR RWY 26R INTO ATL. LOW PRESSURE LIGHT CAME ON FOR THE ONE REMAINING B PUMP #1. ACCOMPLISHED THE 'HYD LEAK OR LOSS' ABNORMAL PROC FROM OUR POM. ASKED APCH FOR PERMISSION TO GO MISSED APCH WHILE WE WORKED ON OUR PROB. HYD QUANTITIES STILL NORMAL, BUT NO SYS B PRESSURE. ACCOMPLISHED THE 'SYS B LEAK OR LOSS FOLLOW-UP' PROC. VECTORED BACK IN TO LAND IN ATLANTA. LANDED UNEVENTFULLY AND PARKED THE AIRPLANE AT THE GATE.

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.