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A canadair CL65 with chronic left engine low oil pressure and high oil consumption history has #7 carbon seal replaced. Second flight lost all oil and engine replaced.
| Attributes | |
| ACN | 539643 |
| Time | |
| Date | 200202 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| 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 | Regional Jet CL65, Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| Qualification | technician : airframe technician : inspection authority technician : powerplant |
| Experience | maintenance technician : 18 |
| ASRS Report | 539643 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 539786 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : left oil press and qty indicator other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : engineering procedure performance deficiency : fault isolation performance deficiency : installation performance deficiency : inspection performance deficiency : repair |
| Supplementary | |
| Problem Areas | Company Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On feb/tue/02, aircraft X came in with low oil pressure (20 psi) and high oil consumption written up in-flight. The aircraft was a ferry flight into the ZZZ airport. This was a chronic oil leak and the engine had approximately 12000 hours. On feb/wed/02 I performed required inspection item of the #7 carbon seal and c-sump cover installation on the l-hand engine. I observed no defects or indications of problems during the installation of these 2 components by the technician performing the work. On the second flight after the release for service engine failure occurred. I believe the low oil pressure in-flight and high oil consumption were the direct causes of this failure, 2 days of back-to-back oil loss and high engine hours. I believe a schedule engine change program for high oil consumption engines would have avoided this in-flight failure.
Original NASA ASRS Text
Title: A CANADAIR CL65 WITH CHRONIC L ENG LOW OIL PRESSURE AND HIGH OIL CONSUMPTION HISTORY HAS #7 CARBON SEAL REPLACED. SECOND FLT LOST ALL OIL AND ENG REPLACED.
Narrative: ON FEB/TUE/02, ACFT X CAME IN WITH LOW OIL PRESSURE (20 PSI) AND HIGH OIL CONSUMPTION WRITTEN UP INFLT. THE ACFT WAS A FERRY FLT INTO THE ZZZ ARPT. THIS WAS A CHRONIC OIL LEAK AND THE ENG HAD APPROX 12000 HRS. ON FEB/WED/02 I PERFORMED REQUIRED INSPECTION ITEM OF THE #7 CARBON SEAL AND C-SUMP COVER INSTALLATION ON THE L-HAND ENG. I OBSERVED NO DEFECTS OR INDICATIONS OF PROBS DURING THE INSTALLATION OF THESE 2 COMPONENTS BY THE TECHNICIAN PERFORMING THE WORK. ON THE SECOND FLT AFTER THE RELEASE FOR SVC ENG FAILURE OCCURRED. I BELIEVE THE LOW OIL PRESSURE INFLT AND HIGH OIL CONSUMPTION WERE THE DIRECT CAUSES OF THIS FAILURE, 2 DAYS OF BACK-TO-BACK OIL LOSS AND HIGH ENG HRS. I BELIEVE A SCHEDULE ENG CHANGE PROGRAM FOR HIGH OIL CONSUMPTION ENGS WOULD HAVE AVOIDED THIS INFLT FAILURE.
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.