Narrative:

10/sun/97 we had a C2 fan change on aircraft YYY #1 engine. While waiting for the aircraft to return from a breather check, I looked for a C2 to use. I used the shop's quick reference for a part number and found that part number to be deleted. I went into the system computer parts code imq to find interchangeabilities. That page gave me 745902 as an interchangeable part number. When I brought up that part number it came up as 07-7233-9-9015. Knowing that part number was a 9-11a per computer and not sure of its interchangeability, I called the engine desk and he in turn put me in touch with material services. They gave me the tracking tag number and serial number of the fan that was allocated. I then went back to the computer and it was down for at least 2 1/2 hours. I brought BBB with me to find the fan allocated from material services and CCC verified the serial number and tt number and said the fan was in our shop. We found the fan allocated which was a 07-7233-9-9015. I told DDD and BBB to start disassembling the engine. I tried several attempts to reach my supervisor with no success. After inspection completed their parts inspection and verifications I still could not get any further feedback and decided to proceed. EEE and myself proceeded with the installation. At XC00 decided to call in FFF and GGG who came in to finish. When they took over it was ready for a torque and stretch. Callback conversation with reporter revealed the following information: the reporter states the wrong C1-C2 fan disc was installed, a JT8D-15 disc was installed on a JT8D-9 engine but was detected prior to flight. The reporter said the combination of the parts computer being down and stores and the engine desk giving the same tracking tag number of the assembly allocated for the engine assured they had the correct part. Callback conversation with reporter of acn 384179: the reporter stated the C1 and C2 disc was installed when assigned to complete the close up of the engine. The reporter said the engine was closed up and signed off. Callback conversation with reporter of acn 384319: the reporter stated that assistance was given to the lead mechanic in finding the correct C1-C2 disc assembly by the reporter. The reporter said were satisfied with the assembly stores had allocated and the tag numbers were verified with the engine desk.

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Original NASA ASRS Text

Title: A DC 9-30 WAS RETURNED TO SVC WITH THE INCORRECT #1 ENG C1 AND C2 FAN DISC INSTALLED. ERROR DISCOVERED PRIOR TO FLT.

Narrative: 10/SUN/97 WE HAD A C2 FAN CHANGE ON ACFT YYY #1 ENG. WHILE WAITING FOR THE ACFT TO RETURN FROM A BREATHER CHK, I LOOKED FOR A C2 TO USE. I USED THE SHOP'S QUICK REF FOR A PART NUMBER AND FOUND THAT PART NUMBER TO BE DELETED. I WENT INTO THE SYS COMPUTER PARTS CODE IMQ TO FIND INTERCHANGEABILITIES. THAT PAGE GAVE ME 745902 AS AN INTERCHANGEABLE PART NUMBER. WHEN I BROUGHT UP THAT PART NUMBER IT CAME UP AS 07-7233-9-9015. KNOWING THAT PART NUMBER WAS A 9-11A PER COMPUTER AND NOT SURE OF ITS INTERCHANGEABILITY, I CALLED THE ENG DESK AND HE IN TURN PUT ME IN TOUCH WITH MATERIAL SVCS. THEY GAVE ME THE TRACKING TAG NUMBER AND SERIAL NUMBER OF THE FAN THAT WAS ALLOCATED. I THEN WENT BACK TO THE COMPUTER AND IT WAS DOWN FOR AT LEAST 2 1/2 HRS. I BROUGHT BBB WITH ME TO FIND THE FAN ALLOCATED FROM MATERIAL SVCS AND CCC VERIFIED THE SERIAL NUMBER AND TT NUMBER AND SAID THE FAN WAS IN OUR SHOP. WE FOUND THE FAN ALLOCATED WHICH WAS A 07-7233-9-9015. I TOLD DDD AND BBB TO START DISASSEMBLING THE ENG. I TRIED SEVERAL ATTEMPTS TO REACH MY SUPVR WITH NO SUCCESS. AFTER INSPECTION COMPLETED THEIR PARTS INSPECTION AND VERIFICATIONS I STILL COULD NOT GET ANY FURTHER FEEDBACK AND DECIDED TO PROCEED. EEE AND MYSELF PROCEEDED WITH THE INSTALLATION. AT XC00 DECIDED TO CALL IN FFF AND GGG WHO CAME IN TO FINISH. WHEN THEY TOOK OVER IT WAS READY FOR A TORQUE AND STRETCH. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATES THE WRONG C1-C2 FAN DISC WAS INSTALLED, A JT8D-15 DISC WAS INSTALLED ON A JT8D-9 ENG BUT WAS DETECTED PRIOR TO FLT. THE RPTR SAID THE COMBINATION OF THE PARTS COMPUTER BEING DOWN AND STORES AND THE ENG DESK GIVING THE SAME TRACKING TAG NUMBER OF THE ASSEMBLY ALLOCATED FOR THE ENG ASSURED THEY HAD THE CORRECT PART. CALLBACK CONVERSATION WITH RPTR OF ACN 384179: THE RPTR STATED THE C1 AND C2 DISC WAS INSTALLED WHEN ASSIGNED TO COMPLETE THE CLOSE UP OF THE ENG. THE RPTR SAID THE ENG WAS CLOSED UP AND SIGNED OFF. CALLBACK CONVERSATION WITH RPTR OF ACN 384319: THE RPTR STATED THAT ASSISTANCE WAS GIVEN TO THE LEAD MECH IN FINDING THE CORRECT C1-C2 DISC ASSEMBLY BY THE RPTR. THE RPTR SAID WERE SATISFIED WITH THE ASSEMBLY STORES HAD ALLOCATED AND THE TAG NUMBERS WERE VERIFIED WITH THE ENG DESK.

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.