Narrative:

On nov/xa/00, air carrier aircraft xyz arrived in the ZZZ air carrier maintenance base for its #1 engine to be changed. I arrived on the morning of nov/sat/00 as the final installation were being performed. After the mechanics were done, I inspected the engine for any discrepancies. I didn't notice any major problems at that time. At that point we ran the plane for its first leak check after the new engine was installed. That leak check went well with no big problems. Then we ran it again for the post engine power assurance check. That leak check we discovered a leaking fuel line under the mechanical fuel control unit. The line was tightened and a third runup and leak check was performed showing no further problems. The aircraft was returned to service and it had gone unnoticed that the newly installed fuel nozzle flow divider B nut had not been safety wired. It had not leaked during our leak checks. The plane flew on nov/sun/00. It flew for 2 legs before it had a problem. During its third leg, the pilot said the #1 engine shut down. 2 mechanics went to meet the plane and they changed the mechanical fuel control and discovered there was fuel leaking from the flow divider. The plane flew to norfolk after the line maintenance was performed and the fuel flow divider was taken off and inspected. It was discovered that the o-ring was cut.

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Original NASA ASRS Text

Title: A DASH 8-200 DURING A MAIN FUEL CTL CHANGE WAS FOUND TO HAVE A LEAKING FUEL NOZZLE FLOW DIVIDER 'B' NUT LEAKING CAUSED BY NOT BEING SAFETY WIRED.

Narrative: ON NOV/XA/00, ACR ACFT XYZ ARRIVED IN THE ZZZ ACR MAINT BASE FOR ITS #1 ENG TO BE CHANGED. I ARRIVED ON THE MORNING OF NOV/SAT/00 AS THE FINAL INSTALLATION WERE BEING PERFORMED. AFTER THE MECHS WERE DONE, I INSPECTED THE ENG FOR ANY DISCREPANCIES. I DIDN'T NOTICE ANY MAJOR PROBS AT THAT TIME. AT THAT POINT WE RAN THE PLANE FOR ITS FIRST LEAK CHK AFTER THE NEW ENG WAS INSTALLED. THAT LEAK CHK WENT WELL WITH NO BIG PROBS. THEN WE RAN IT AGAIN FOR THE POST ENG PWR ASSURANCE CHK. THAT LEAK CHK WE DISCOVERED A LEAKING FUEL LINE UNDER THE MECHANICAL FUEL CTL UNIT. THE LINE WAS TIGHTENED AND A THIRD RUNUP AND LEAK CHK WAS PERFORMED SHOWING NO FURTHER PROBS. THE ACFT WAS RETURNED TO SVC AND IT HAD GONE UNNOTICED THAT THE NEWLY INSTALLED FUEL NOZZLE FLOW DIVIDER B NUT HAD NOT BEEN SAFETY WIRED. IT HAD NOT LEAKED DURING OUR LEAK CHKS. THE PLANE FLEW ON NOV/SUN/00. IT FLEW FOR 2 LEGS BEFORE IT HAD A PROB. DURING ITS THIRD LEG, THE PLT SAID THE #1 ENG SHUT DOWN. 2 MECHS WENT TO MEET THE PLANE AND THEY CHANGED THE MECHANICAL FUEL CTL AND DISCOVERED THERE WAS FUEL LEAKING FROM THE FLOW DIVIDER. THE PLANE FLEW TO NORFOLK AFTER THE LINE MAINT WAS PERFORMED AND THE FUEL FLOW DIVIDER WAS TAKEN OFF AND INSPECTED. IT WAS DISCOVERED THAT THE O-RING WAS CUT.

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.