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B747-400 experiencing loss of system 4 hydraulic quantity is unable to arouse interest in their problem with ground crews at destination.
| Attributes | |
| ACN | 744411 |
| Time | |
| Date | 200706 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 33000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level descent : approach ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 100 flight time total : 15000 flight time type : 100 |
| ASRS Report | 744411 |
| Person 2 | |
| Affiliation | other |
| Function | other personnel other |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : company policies |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Company Aircraft |
| Primary Problem | Company |
Narrative:
Hydraulic system #4 losing fluid; followed 2 checklists to stop hydraulic #4 quantity loss. Finally stabilized; prepared dispatch for possible need for tow in dulles after landing if gear down does not provide more hydraulic #4 fluid. Fluid increase with gear down. Fire department finds leak on gear. No tug ever appeared from air carrier in event we needed it as requested. Taxi to gate with hydraulic #4 being closely monitored and fluid quantity holding at 50% and good brakes and full accumulator pressure; same as when gear extended. Junk on ramp at gate inside red boundary lines. Stopped taxi despite waving wands wanting us to proceed; made them move equipment then parked. Previous problems with this plane weeks ago losing hydraulic #4 fluid; still not repaired.
Original NASA ASRS Text
Title: B747-400 EXPERIENCING LOSS OF SYSTEM 4 HYDRAULIC QUANTITY IS UNABLE TO AROUSE INTEREST IN THEIR PROBLEM WITH GND CREWS AT DESTINATION.
Narrative: HYD SYS #4 LOSING FLUID; FOLLOWED 2 CHKLISTS TO STOP HYD #4 QUANTITY LOSS. FINALLY STABILIZED; PREPARED DISPATCH FOR POSSIBLE NEED FOR TOW IN DULLES AFTER LNDG IF GEAR DOWN DOES NOT PROVIDE MORE HYD #4 FLUID. FLUID INCREASE WITH GEAR DOWN. FIRE DEPT FINDS LEAK ON GEAR. NO TUG EVER APPEARED FROM ACR IN EVENT WE NEEDED IT AS REQUESTED. TAXI TO GATE WITH HYD #4 BEING CLOSELY MONITORED AND FLUID QUANTITY HOLDING AT 50% AND GOOD BRAKES AND FULL ACCUMULATOR PRESSURE; SAME AS WHEN GEAR EXTENDED. JUNK ON RAMP AT GATE INSIDE RED BOUNDARY LINES. STOPPED TAXI DESPITE WAVING WANDS WANTING US TO PROCEED; MADE THEM MOVE EQUIP THEN PARKED. PREVIOUS PROBS WITH THIS PLANE WEEKS AGO LOSING HYD #4 FLUID; STILL NOT REPAIRED.
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.