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An embraer 140 shut down #1 engine in-flight due to loss of oil pressure and quantity caused by an incorrectly installed generator drive carbon seal.
| Attributes | |
| ACN | 555922 |
| Time | |
| Date | 200208 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 140 ER&LR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 2 |
| ASRS Report | 555922 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : #1 eng oil press ind other flight crewa other flight crewb |
| Resolutory Action | flight crew : diverted to another airport |
| Consequence | other other |
| Factors | |
| Maintenance | performance deficiency : repair performance deficiency : installation performance deficiency : inspection performance deficiency : testing performance deficiency : training |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
On aug/sat/02 I replaced a magnetic carbon seal on the #1 generator of aircraft. After replacing the seal, another mechanic performed the ground idle runs. I had assumed the mechanic knew what kind of runs were required, because he had changed a carbon seal before and I had not. I did not notice the last page of the manual where it stated to run the engine at maximum power. On the first flight of the day (aug/sun/02) 20 mins into the flight, the #1 engine lost oil pressure resulting in an in-flight shutdown. The engine and generator were not damaged. The mechanic that removed the generator stated that the snap ring and carbon seal had come out and were up against the generator.
Original NASA ASRS Text
Title: AN EMBRAER 140 SHUT DOWN #1 ENG INFLT DUE TO LOSS OF OIL PRESSURE AND QUANTITY CAUSED BY AN INCORRECTLY INSTALLED GENERATOR DRIVE CARBON SEAL.
Narrative: ON AUG/SAT/02 I REPLACED A MAGNETIC CARBON SEAL ON THE #1 GENERATOR OF ACFT. AFTER REPLACING THE SEAL, ANOTHER MECH PERFORMED THE GND IDLE RUNS. I HAD ASSUMED THE MECH KNEW WHAT KIND OF RUNS WERE REQUIRED, BECAUSE HE HAD CHANGED A CARBON SEAL BEFORE AND I HAD NOT. I DID NOT NOTICE THE LAST PAGE OF THE MANUAL WHERE IT STATED TO RUN THE ENG AT MAX PWR. ON THE FIRST FLT OF THE DAY (AUG/SUN/02) 20 MINS INTO THE FLT, THE #1 ENG LOST OIL PRESSURE RESULTING IN AN INFLT SHUTDOWN. THE ENG AND GENERATOR WERE NOT DAMAGED. THE MECH THAT REMOVED THE GENERATOR STATED THAT THE SNAP RING AND CARBON SEAL HAD COME OUT AND WERE UP AGAINST THE GENERATOR.
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.