Narrative:

Flight abc (air carrier) left YYY to XXX on jan/xy/99. While en route to XXX flight engineer on B727 noticed #1 engine oil qty go from 3 gals to 1 gal. Captain pulled #1 engine throttle to idle and continued to XXX. Logbook write up was '#1 engine oil qty decreased from 3 gals to 1 gal and stabilized. Oil temperature and pressure remained normal.' corrective action was 'found oil cap off oil tank, put in 12 qts of oil.' the B727 ship #xyz had a scheduled service check the night before on jan/xz/99. At XA03 the B727 arrived at YYY. Myself and 2 other maintenance technicians were assigned to work on the aircraft. I did the engine items for the #1 engine which were replace engine oil filter, hydraulic filter, service CSD wet spline, service engine oil to full, check chip detector. After all those above items had been accomplished I had the other technician run #1 engine for leak check. No leaks were found. I closed the engine cowling and decided I should check the oil qty one more time. I opened the oil access door removed oil cap and put in 2 qts of oil. I remember putting the oil tank cap back on. When the other technician yelled something to me from the ground about he was going to start on the double brake change and that he was only able to find 1 brake. I turned my attention to him and called the lead technician on the radio to inform him of the situation. After that I looked back at the engine and closed the oil service door. I don't recall if I secured the oil cap lock lever. I then lowered the lift truck down and went to help the other technician with the double brake change. With so many things going on at one time it's not hard to get distracted.

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Original NASA ASRS Text

Title: A B727-200 WAS DISPATCHED WITH THE #1 ENG OIL CAP NOT SECURED INCURRING A LOSS OF OIL.

Narrative: FLT ABC (ACR) LEFT YYY TO XXX ON JAN/XY/99. WHILE ENRTE TO XXX FE ON B727 NOTICED #1 ENG OIL QTY GO FROM 3 GALS TO 1 GAL. CAPT PULLED #1 ENG THROTTLE TO IDLE AND CONTINUED TO XXX. LOGBOOK WRITE UP WAS '#1 ENG OIL QTY DECREASED FROM 3 GALS TO 1 GAL AND STABILIZED. OIL TEMP AND PRESSURE REMAINED NORMAL.' CORRECTIVE ACTION WAS 'FOUND OIL CAP OFF OIL TANK, PUT IN 12 QTS OF OIL.' THE B727 SHIP #XYZ HAD A SCHEDULED SVC CHK THE NIGHT BEFORE ON JAN/XZ/99. AT XA03 THE B727 ARRIVED AT YYY. MYSELF AND 2 OTHER MAINT TECHNICIANS WERE ASSIGNED TO WORK ON THE ACFT. I DID THE ENG ITEMS FOR THE #1 ENG WHICH WERE REPLACE ENG OIL FILTER, HYD FILTER, SVC CSD WET SPLINE, SVC ENG OIL TO FULL, CHK CHIP DETECTOR. AFTER ALL THOSE ABOVE ITEMS HAD BEEN ACCOMPLISHED I HAD THE OTHER TECHNICIAN RUN #1 ENG FOR LEAK CHK. NO LEAKS WERE FOUND. I CLOSED THE ENG COWLING AND DECIDED I SHOULD CHK THE OIL QTY ONE MORE TIME. I OPENED THE OIL ACCESS DOOR REMOVED OIL CAP AND PUT IN 2 QTS OF OIL. I REMEMBER PUTTING THE OIL TANK CAP BACK ON. WHEN THE OTHER TECHNICIAN YELLED SOMETHING TO ME FROM THE GND ABOUT HE WAS GOING TO START ON THE DOUBLE BRAKE CHANGE AND THAT HE WAS ONLY ABLE TO FIND 1 BRAKE. I TURNED MY ATTN TO HIM AND CALLED THE LEAD TECHNICIAN ON THE RADIO TO INFORM HIM OF THE SIT. AFTER THAT I LOOKED BACK AT THE ENG AND CLOSED THE OIL SVC DOOR. I DON'T RECALL IF I SECURED THE OIL CAP LOCK LEVER. I THEN LOWERED THE LIFT TRUCK DOWN AND WENT TO HELP THE OTHER TECHNICIAN WITH THE DOUBLE BRAKE CHANGE. WITH SO MANY THINGS GOING ON AT ONE TIME IT'S NOT HARD TO GET DISTRACTED.

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.