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Air carrier has filter bypass light on briefly at engine start. On taxi out airborne vibration monitor is high momentarily. During climb oil quantity gauge drops to zero.
| Attributes | |
| ACN | 182241 |
| Time | |
| Date | 199106 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : den |
| State Reference | CO |
| Altitude | msl bound lower : 5883 msl bound upper : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport |
| Flight Phase | climbout : intermediate altitude climbout : initial |
| Route In Use | enroute : on vectors enroute airway : den |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 123 flight time total : 15000 flight time type : 123 |
| ASRS Report | 182241 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
We started our engines on pushback for the first leg of the day. It was 70 degree out. When we started to rotate engine #2 for start it's filter bypass light came on. Although we wrote in the logbook it was on for 1 1/2 to 2 mins, on reflection afterwards, it became apparent that it was only on for approximately 45 seconds to 1 min, because it went out as #3 engine reached idle after start. On taxi out #2 airborne vibration monitor on the #2 engine was observed to reach 2.5 momentarily as I advanced the throttles for taxi. I pushed the #2 throttle up a little more and the avm fell below 1.0. I then pulled the throttle back to idle and again advanced it. It still stayed below 1.0. During climb out after departure, the engine #2 oil quantity gauge dropped to zero, all other engine #2 instrument indications remained within normal parameters. I elected to return to den to have engine #2 oil system checked. Upon checking the oil system, metal fragments were found in the filter, necessitating an engine change.
Original NASA ASRS Text
Title: ACR HAS FILTER BYPASS LIGHT ON BRIEFLY AT ENGINE START. ON TAXI OUT AIRBORNE VIBRATION MONITOR IS HIGH MOMENTARILY. DURING CLIMB OIL QUANTITY GAUGE DROPS TO ZERO.
Narrative: WE STARTED OUR ENGS ON PUSHBACK FOR THE FIRST LEG OF THE DAY. IT WAS 70 DEG OUT. WHEN WE STARTED TO ROTATE ENG #2 FOR START IT'S FILTER BYPASS LIGHT CAME ON. ALTHOUGH WE WROTE IN THE LOGBOOK IT WAS ON FOR 1 1/2 TO 2 MINS, ON REFLECTION AFTERWARDS, IT BECAME APPARENT THAT IT WAS ONLY ON FOR APPROX 45 SECS TO 1 MIN, BECAUSE IT WENT OUT AS #3 ENG REACHED IDLE AFTER START. ON TAXI OUT #2 AIRBORNE VIBRATION MONITOR ON THE #2 ENG WAS OBSERVED TO REACH 2.5 MOMENTARILY AS I ADVANCED THE THROTTLES FOR TAXI. I PUSHED THE #2 THROTTLE UP A LITTLE MORE AND THE AVM FELL BELOW 1.0. I THEN PULLED THE THROTTLE BACK TO IDLE AND AGAIN ADVANCED IT. IT STILL STAYED BELOW 1.0. DURING CLBOUT AFTER DEP, THE ENG #2 OIL QUANTITY GAUGE DROPPED TO ZERO, ALL OTHER ENG #2 INSTRUMENT INDICATIONS REMAINED WITHIN NORMAL PARAMETERS. I ELECTED TO RETURN TO DEN TO HAVE ENG #2 OIL SYS CHKED. UPON CHKING THE OIL SYS, METAL FRAGMENTS WERE FOUND IN THE FILTER, NECESSITATING AN ENG CHANGE.
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.