<< >> NASA ASRS Report 630108, August 2004

A B737 flight crew called maintenance about hydraulic quantity in the 'a' system dropping. Maintenance svced the system.

Attributes
ACN	630108
Time
Date	200408
Day	Sun
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 121
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	630108
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : hyp quantity oil gauge other flight crewa
Resolutory Action	other
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

After arrival the flight crew called to advise me that while sitting on the gate with the electric pumps on, the aircraft had the 'a' system reservoir quantity dropping, 'B' reservoir was over svced and there was hydraulic fluid leaking from the aircraft belly. After they turned off the hydraulic pumps, the leak stopped. Based on the history of the 'B' reservoir quaintly needing svced. Based on that information, we suspected a fluid xfer issue, which we verified to be true. We reset the system, serviced 'a' system, and operated hydraulic pumps, with no fluid xfer or leak from drain noted.

Related reports:

• An airbus A320 on takeoff climb at 3000 ft lost yellow hydra...
• SF340 flight crew noticed enroute a lower than typical hydra...
• Two hours into the flight EICAS alerted a B767-300 flight cr...
• A gulfstream ii was dispatched in non compliance after maint...
• When an A320 flight crew wrote up the green system hydraulic...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: A B737 FLT CREW CALLED MAINT ABOUT HYD QUANTITY IN THE 'A' SYS DROPPING. MAINT SVCED THE SYS.

Narrative: AFTER ARR THE FLT CREW CALLED TO ADVISE ME THAT WHILE SITTING ON THE GATE WITH THE ELECTRIC PUMPS ON, THE ACFT HAD THE 'A' SYS RESERVOIR QUANTITY DROPPING, 'B' RESERVOIR WAS OVER SVCED AND THERE WAS HYD FLUID LEAKING FROM THE ACFT BELLY. AFTER THEY TURNED OFF THE HYD PUMPS, THE LEAK STOPPED. BASED ON THE HISTORY OF THE 'B' RESERVOIR QUAINTLY NEEDING SVCED. BASED ON THAT INFO, WE SUSPECTED A FLUID XFER ISSUE, WHICH WE VERIFIED TO BE TRUE. WE RESET THE SYS, SERVICED 'A' SYS, AND OPERATED HYD PUMPS, WITH NO FLUID XFER OR LEAK FROM DRAIN NOTED.

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.