Narrative:

On 5/wed/04 at approximately xa:45 pm, arrived here in ZZZ at gate. I was assigned the engines, one of my assignments was the #2 engine magnetic chip dv/idg filter gv and service. Card # X. Knowing I had the card assigned, I let the inspector know about the job card and he informed me that the card was no longer inspection required and that it had been revised on 5/thu/04. So I gathered my tools and supplies and proceeded to the aircraft at approximately xb:00 pm. I serviced the engine's oils first, then - preceded through the steps on the #2 engine magnetic chip dv/idg filter gv and service card. I first opened the chip detector access panel, then removed and inspected the magnetic chip detectors, I replaced the packing and installed the scavenge screens. I then began installing the chip detectors, making sure they were in and locked, verifying the red stripes. During the installation of the chip detectors, I did not notice anything out of the ordinary. With the chip detectors removed, the scavenge pump plungers were not leaking. The normal amount of force was needed to re-install the chip detectors. I then wiped down the outside of the chip detectors and housing. Checked for leaks. There were no leaks, so I then closed the chip detector access panel and continued with the rest of the work card and duties for the night. On the morning of 5/thu/04, aircraft departed ZZZ at approximately xm:15 am to ZZZ1. They climbed to 30,000 ft; on climb to 33,000 ft the pilots noticed the low oil psi light. They then noticed the oil level low and contacted mx control. They then shut the #2 engine down and diverted into ZZZ2. There in ZZZ2 it was determined that the engine was ran without oil beyond the maximum time allowed, therefore an engine change was required. I believe some corrective actions that can be taken are to change the work card back to inspection required. I feel when you break into a system like that, a second set of eyes is important. Also an engine run to add oil pressure to the chip detectors to check for leaks would help. Callback conversation with reporter revealed the following information: the reporter stated the cause of the oil loss was one of the chip detector plugs was not locked and backed out from engine oil pressure. The reporter said all the magnetic detector plugs were installed per the procedure and the red line was visible indicating bayonet pins were aligned with the slots and appeared normal in every respect. The reporter stated there is a check valve above the detector plug that would have closed and prevented oil leakage but the cowling is so close fitting, the detector plug could not drop completely out to allow the check valve to close. The reporter said the requirement for magnetic detector plug installation final inspection was dropped and inspection is not a requirement. The reporter stated that after magnetic detector plugs, oil filter main and scavenge installations the engine should be run for leak checks.

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Original NASA ASRS Text

Title: A B737-800 ON CLB TO FL330 DECLARED AN EMER AND DIVERTED DUE TO R ENG LOW OIL PRESSURE LIGHT AND LOW OIL QUANTITY. ENG SHUTDOWN.

Narrative: ON 5/WED/04 AT APPROX XA:45 PM, ARRIVED HERE IN ZZZ AT GATE. I WAS ASSIGNED THE ENGS, ONE OF MY ASSIGNMENTS WAS THE #2 ENG MAG CHIP DV/IDG FILTER GV AND SERVICE. CARD # X. KNOWING I HAD THE CARD ASSIGNED, I LET THE INSPECTOR KNOW ABOUT THE JOB CARD AND HE INFORMED ME THAT THE CARD WAS NO LONGER INSPECTION REQUIRED AND THAT IT HAD BEEN REVISED ON 5/THU/04. SO I GATHERED MY TOOLS AND SUPPLIES AND PROCEEDED TO THE ACFT AT APPROX XB:00 PM. I SERVICED THE ENG'S OILS FIRST, THEN - PRECEDED THROUGH THE STEPS ON THE #2 ENG MAG CHIP DV/IDG FILTER GV AND SVC CARD. I FIRST OPENED THE CHIP DETECTOR ACCESS PANEL, THEN REMOVED AND INSPECTED THE MAG CHIP DETECTORS, I REPLACED THE PACKING AND INSTALLED THE SCAVENGE SCREENS. I THEN BEGAN INSTALLING THE CHIP DETECTORS, MAKING SURE THEY WERE IN AND LOCKED, VERIFYING THE RED STRIPES. DURING THE INSTALLATION OF THE CHIP DETECTORS, I DID NOT NOTICE ANYTHING OUT OF THE ORDINARY. WITH THE CHIP DETECTORS REMOVED, THE SCAVENGE PUMP PLUNGERS WERE NOT LEAKING. THE NORMAL AMOUNT OF FORCE WAS NEEDED TO RE-INSTALL THE CHIP DETECTORS. I THEN WIPED DOWN THE OUTSIDE OF THE CHIP DETECTORS AND HOUSING. CHECKED FOR LEAKS. THERE WERE NO LEAKS, SO I THEN CLOSED THE CHIP DETECTOR ACCESS PANEL AND CONTINUED WITH THE REST OF THE WORK CARD AND DUTIES FOR THE NIGHT. ON THE MORNING OF 5/THU/04, ACFT DEPARTED ZZZ AT APPROX XM:15 AM TO ZZZ1. THEY CLBED TO 30,000 FT; ON CLB TO 33,000 FT THE PLTS NOTICED THE LOW OIL PSI LIGHT. THEY THEN NOTICED THE OIL LEVEL LOW AND CONTACTED MX CTL. THEY THEN SHUT THE #2 ENG DOWN AND DIVERTED INTO ZZZ2. THERE IN ZZZ2 IT WAS DETERMINED THAT THE ENG WAS RAN WITHOUT OIL BEYOND THE MAX TIME ALLOWED, THEREFORE AN ENG CHANGE WAS REQUIRED. I BELIEVE SOME CORRECTIVE ACTIONS THAT CAN BE TAKEN ARE TO CHANGE THE WORK CARD BACK TO INSPECTION REQUIRED. I FEEL WHEN YOU BREAK INTO A SYSTEM LIKE THAT, A SECOND SET OF EYES IS IMPORTANT. ALSO AN ENG RUN TO ADD OIL PRESSURE TO THE CHIP DETECTORS TO CHECK FOR LEAKS WOULD HELP. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE CAUSE OF THE OIL LOSS WAS ONE OF THE CHIP DETECTOR PLUGS WAS NOT LOCKED AND BACKED OUT FROM ENG OIL PRESSURE. THE RPTR SAID ALL THE MAGNETIC DETECTOR PLUGS WERE INSTALLED PER THE PROC AND THE RED LINE WAS VISIBLE INDICATING BAYONET PINS WERE ALIGNED WITH THE SLOTS AND APPEARED NORMAL IN EVERY RESPECT. THE RPTR STATED THERE IS A CHECK VALVE ABOVE THE DETECTOR PLUG THAT WOULD HAVE CLOSED AND PREVENTED OIL LEAKAGE BUT THE COWLING IS SO CLOSE FITTING, THE DETECTOR PLUG COULD NOT DROP COMPLETELY OUT TO ALLOW THE CHECK VALVE TO CLOSE. THE RPTR SAID THE REQUIREMENT FOR MAGNETIC DETECTOR PLUG INSTALLATION FINAL INSPECTION WAS DROPPED AND INSPECTION IS NOT A REQUIREMENT. THE RPTR STATED THAT AFTER MAGNETIC DETECTOR PLUGS, OIL FILTER MAIN AND SCAVENGE INSTALLATIONS THE ENG SHOULD BE RUN FOR LEAK CHECKS.

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.