A CRJ700 being taxied to the terminal for a morning trip reports fuel leaking into center tank. Aircraft was removed from service when flight crew discovered fuel draining into center tank.

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Attributes
ACN	660706
Time
Date	200506
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Regional Jet 700 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	660706
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : ctr tank fuel qty ind other flight crewa other flight crewb other other : 1
Resolutory Action	other
Consequence	other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : fault isolation
Supplementary
Problem Areas	Maintenance Human Performance Chart Or Publication Aircraft
Primary Problem	Aircraft

Narrative:

Myself and co-worker were taxiing north from the maintenance hangar to the gate for the morning departure. Earlier I had noticed that there was 30 pounds of fuel in the center fuel tank. 1 hour later; when we got into the aircraft to take it to the gate; I noticed that there was 600 pounds of fuel in the center fuel tank. I called the crew chief and notified him about the problem. This is word for word how the radio call went: I said; 'has the primary fuel ejector modification been done on this aircraft?' which was the first cause for the leakage that came to my mind. The old ejectors were cracking and causing leakage into the center tank. The crew chief then replied; 'I don't know; I would have to look it up.' I then said; 'I was wondering because it is leaking a lot of fuel into the center tank.' he then replied; 'I don't have time to look into this right now.' so after that; we took the plane to the gate. The aircraft never flew out. The crew saw the quantity of the center tank and then wrote it up in the aircraft maintenance log.

Original NASA ASRS Text

Title: A CRJ700 BEING TAXIED TO THE TERMINAL FOR A MORNING TRIP RPTS FUEL LEAKING INTO CTR TANK. ACFT WAS REMOVED FROM SVC WHEN FLT CREW DISCOVERED FUEL DRAINING INTO CTR TANK.

Narrative: MYSELF AND CO-WORKER WERE TAXIING N FROM THE MAINT HANGAR TO THE GATE FOR THE MORNING DEP. EARLIER I HAD NOTICED THAT THERE WAS 30 LBS OF FUEL IN THE CTR FUEL TANK. 1 HR LATER; WHEN WE GOT INTO THE ACFT TO TAKE IT TO THE GATE; I NOTICED THAT THERE WAS 600 LBS OF FUEL IN THE CTR FUEL TANK. I CALLED THE CREW CHIEF AND NOTIFIED HIM ABOUT THE PROB. THIS IS WORD FOR WORD HOW THE RADIO CALL WENT: I SAID; 'HAS THE PRIMARY FUEL EJECTOR MODIFICATION BEEN DONE ON THIS ACFT?' WHICH WAS THE FIRST CAUSE FOR THE LEAKAGE THAT CAME TO MY MIND. THE OLD EJECTORS WERE CRACKING AND CAUSING LEAKAGE INTO THE CTR TANK. THE CREW CHIEF THEN REPLIED; 'I DON'T KNOW; I WOULD HAVE TO LOOK IT UP.' I THEN SAID; 'I WAS WONDERING BECAUSE IT IS LEAKING A LOT OF FUEL INTO THE CTR TANK.' HE THEN REPLIED; 'I DON'T HAVE TIME TO LOOK INTO THIS RIGHT NOW.' SO AFTER THAT; WE TOOK THE PLANE TO THE GATE. THE ACFT NEVER FLEW OUT. THE CREW SAW THE QUANTITY OF THE CTR TANK AND THEN WROTE IT UP IN THE ACFT MAINT LOG.

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.