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Maintenance problem forces aircraft to divert land. Diffuser case tube too short causing oil consumption.
| Attributes | |
| ACN | 289214 |
| Time | |
| Date | 199410 |
| Day | Thu |
| Place | |
| Locale Reference | airport : tul |
| State Reference | OK |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 289214 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far other anomaly other |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
I was notified that a diffuser case tube that I allegedly machined was installed on an engine. This tube was allegedly machined too short and allowed engine oil to be consumed, causing a diversion into tul on a scheduled company flight. The tube is not serialized. The documentation tag was supplied to me by company. The engine had passed test and had 17 cycles prior to alleged failure. Maintenance procedure should be changed to include a jig to braze each ferrule to tube so that all tubes will be assured of being the same length. This tube should also be designated an inspection item. A work card could also be made up for the proper sequence of repair and inspection.
Original NASA ASRS Text
Title: MAINT PROB FORCES ACFT TO DIVERT LAND. DIFFUSER CASE TUBE TOO SHORT CAUSING OIL CONSUMPTION.
Narrative: I WAS NOTIFIED THAT A DIFFUSER CASE TUBE THAT I ALLEGEDLY MACHINED WAS INSTALLED ON AN ENG. THIS TUBE WAS ALLEGEDLY MACHINED TOO SHORT AND ALLOWED ENG OIL TO BE CONSUMED, CAUSING A DIVERSION INTO TUL ON A SCHEDULED COMPANY FLT. THE TUBE IS NOT SERIALIZED. THE DOCUMENTATION TAG WAS SUPPLIED TO ME BY COMPANY. THE ENG HAD PASSED TEST AND HAD 17 CYCLES PRIOR TO ALLEGED FAILURE. MAINT PROC SHOULD BE CHANGED TO INCLUDE A JIG TO BRAZE EACH FERRULE TO TUBE SO THAT ALL TUBES WILL BE ASSURED OF BEING THE SAME LENGTH. THIS TUBE SHOULD ALSO BE DESIGNATED AN INSPECTION ITEM. A WORK CARD COULD ALSO BE MADE UP FOR THE PROPER SEQUENCE OF REPAIR AND INSPECTION.
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.