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A B737 pilot comments that with an 'a' hydraulic system failure; after landing fluid continues leaking because of the altitude flap master southwest valve position.
| Attributes | |
| ACN | 774486 |
| Time | |
| Date | 200802 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : holding |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 774486 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : landed in emergency condition other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
| Situations | |
| Publication | Acft Hyd System Emer Chklist |
Narrative:
Flying ZZZ1 to ZZZ2; around 1/2 way to ZZZ2 we notice system 'a' hydraulic gauge was reading '0.' soon after we lost pressure in system 'a' and decided to return to ZZZ1. Declared emergency; ran system 'a' failure checklist and landed runway 8L. Taxied off runway 8L and was towed to ramp. Just as a suggestion maybe we could have an after landing checklist for system 'a' failure. Turning off all the hydraulic pumps would probably be a good idea. As we sat on the taxiway; I still had the 'a' flight control switch still on with the alternate flap master switch on. That means I was still (in my case) pumping hydraulic fluid on the ramp. I finally turned them off after the crash fire rescue equipment personnel told me that I was leaking fluid.
Original NASA ASRS Text
Title: A B737 PILOT COMMENTS THAT WITH AN 'A' HYDRAULIC SYSTEM FAILURE; AFTER LNDG FLUID CONTINUES LEAKING BECAUSE OF THE ALT FLAP MASTER SW VALVE POSITION.
Narrative: FLYING ZZZ1 TO ZZZ2; AROUND 1/2 WAY TO ZZZ2 WE NOTICE SYS 'A' HYD GAUGE WAS READING '0.' SOON AFTER WE LOST PRESSURE IN SYS 'A' AND DECIDED TO RETURN TO ZZZ1. DECLARED EMER; RAN SYS 'A' FAILURE CHKLIST AND LANDED RWY 8L. TAXIED OFF RWY 8L AND WAS TOWED TO RAMP. JUST AS A SUGGESTION MAYBE WE COULD HAVE AN AFTER LNDG CHKLIST FOR SYS 'A' FAILURE. TURNING OFF ALL THE HYD PUMPS WOULD PROBABLY BE A GOOD IDEA. AS WE SAT ON THE TXWY; I STILL HAD THE 'A' FLT CTL SWITCH STILL ON WITH THE ALTERNATE FLAP MASTER SWITCH ON. THAT MEANS I WAS STILL (IN MY CASE) PUMPING HYD FLUID ON THE RAMP. I FINALLY TURNED THEM OFF AFTER THE CFR PERSONNEL TOLD ME THAT I WAS LEAKING FLUID.
Data retrieved from NASA's ASRS site as of May 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.