A B727-200 was dispatched after troubleshooting a #3 engine fuel leak on gate at ZZZ with a no leak found signoff. Overnight layover station found #3 engine fuel flow transmitter seal leaking.

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Attributes
ACN	461044
Time
Date	200001
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ind.tower
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	ground : parked ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
ASRS Report	461044
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
Events
Anomaly	aircraft equipment problem : critical
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : fault isolation performance deficiency : repair performance deficiency : inspection
Supplementary
Problem Areas	Maintenance Human Performance Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

In good conscience, I felt there were no leaks when engine #3 was leak checked in ZZZ. Ship xyz arrived fuel dripping from #3 engine cowling. Opened cowling, ran engine at idle -- no leaks noted. Closed cowling, signed off logbook. On follow-up on jan/xa/00, maintenance in XXX found #3 fuel flow regulator o-ring crushed.

Original NASA ASRS Text

Title: A B727-200 WAS DISPATCHED AFTER TROUBLESHOOTING A #3 ENG FUEL LEAK ON GATE AT ZZZ WITH A NO LEAK FOUND SIGNOFF. OVERNIGHT LAYOVER STATION FOUND #3 ENG FUEL FLOW XMITTER SEAL LEAKING.

Narrative: IN GOOD CONSCIENCE, I FELT THERE WERE NO LEAKS WHEN ENG #3 WAS LEAK CHKED IN ZZZ. SHIP XYZ ARRIVED FUEL DRIPPING FROM #3 ENG COWLING. OPENED COWLING, RAN ENG AT IDLE -- NO LEAKS NOTED. CLOSED COWLING, SIGNED OFF LOGBOOK. ON FOLLOW-UP ON JAN/XA/00, MAINT IN XXX FOUND #3 FUEL FLOW REGULATOR O-RING CRUSHED.

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.