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A B727-200 engine had the fan assembly replaced with a JT8D-15 fan module due to part number confusion. Correct fan module is for JT8D-15A engine.
| Attributes | |
| ACN | 483363 |
| Time | |
| Date | 200008 |
| Day | Tue |
| 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 | |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| Qualification | technician : airframe technician : fcc technician : powerplant |
| Experience | maintenance lead technician : 4 |
| ASRS Report | 483363 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : company policies non adherence : far |
| Independent Detector | other other : person 3 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : manuals contributing factor : work cards performance deficiency : repair performance deficiency : scheduled maintenance performance deficiency : installation performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Air carrier stocks fans by air carrier part number, not manufacturer part number. It is up to the lead or mechanic to verify proper manufacturer part number for installation on engine. After receiving the fan and during verification of the manufacturer part number for the engine, I got the 2 different manufacturer part number confused (due to their similarity). Also at this time the serial numbers must be verified between the hub, hub data card, and the shop tag. As stated before air carrier stocks fans by air carrier part number with only a manufacturer part number on the shop tag. The manufacturer part number is an assembly part number which is not found on the fan itself anywhere, but is a number for the hub and blade set assembly. Also the hub can be used on either A-15 or A-15A. When the shop builds up the assembly they know if it is A-15 or -15A and should put that information on the shop tag.
Original NASA ASRS Text
Title: A B727-200 ENG HAD THE FAN ASSEMBLY REPLACED WITH A JT8D-15 FAN MODULE DUE TO PART NUMBER CONFUSION. CORRECT FAN MODULE IS FOR JT8D-15A ENG.
Narrative: ACR STOCKS FANS BY ACR PART NUMBER, NOT MANUFACTURER PART NUMBER. IT IS UP TO THE LEAD OR MECH TO VERIFY PROPER MANUFACTURER PART NUMBER FOR INSTALLATION ON ENG. AFTER RECEIVING THE FAN AND DURING VERIFICATION OF THE MANUFACTURER PART NUMBER FOR THE ENG, I GOT THE 2 DIFFERENT MANUFACTURER PART NUMBER CONFUSED (DUE TO THEIR SIMILARITY). ALSO AT THIS TIME THE SERIAL NUMBERS MUST BE VERIFIED BTWN THE HUB, HUB DATA CARD, AND THE SHOP TAG. AS STATED BEFORE ACR STOCKS FANS BY ACR PART NUMBER WITH ONLY A MANUFACTURER PART NUMBER ON THE SHOP TAG. THE MANUFACTURER PART NUMBER IS AN ASSEMBLY PART NUMBER WHICH IS NOT FOUND ON THE FAN ITSELF ANYWHERE, BUT IS A NUMBER FOR THE HUB AND BLADE SET ASSEMBLY. ALSO THE HUB CAN BE USED ON EITHER A-15 OR A-15A. WHEN THE SHOP BUILDS UP THE ASSEMBLY THEY KNOW IF IT IS A-15 OR -15A AND SHOULD PUT THAT INFO ON THE SHOP TAG.
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.