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A B737-300's 'a' hydraulic system fluid quantity decreased to zero after the landing gear was lowered on final. An emergency was declared with a normal landing.
| Attributes | |
| ACN | 766920 |
| Time | |
| Date | 200712 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 766920 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : landed in emergency condition flight crew : declared emergency flight crew : overcame equipment problem |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
On approach to ZZZ; after lowering landing gear; a hydraulic quantity decreased to zero; followed by zero a hydraulic system pressure indicated on hydraulic pressure gauge. Followed QRH loss of system a procedure. Declared an emergency. Landed uneventfully. Taxied clear of runway; joined ramp; stopped and was then towed to hardstand.
Original NASA ASRS Text
Title: A B737-300'S 'A' HYDRAULIC SYSTEM FLUID QUANTITY DECREASED TO ZERO AFTER THE LNDG GEAR WAS LOWERED ON FINAL. AN EMER WAS DECLARED WITH A NORMAL LNDG.
Narrative: ON APCH TO ZZZ; AFTER LOWERING LNDG GEAR; A HYD QUANTITY DECREASED TO ZERO; FOLLOWED BY ZERO A HYD SYS PRESSURE INDICATED ON HYD PRESSURE GAUGE. FOLLOWED QRH LOSS OF SYS A PROC. DECLARED AN EMER. LANDED UNEVENTFULLY. TAXIED CLR OF RWY; JOINED RAMP; STOPPED AND WAS THEN TOWED TO HARDSTAND.
Data retrieved from NASA's ASRS site as of January 2009 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.