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A B737 flight crew experienced right engine fluctuations during taxi out and returned to the gate for maintenance. On subsequent departure fluctuations return and crew declared an emergency before returning with the affected engine at idle.
| Attributes | |
| ACN | 875956 |
| Time | |
| Date | 201002 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.TRACON |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Component | |
| Aircraft Component | Turbine Engine |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Person 2 | |
| Function | Pilot Flying Captain |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Altitude Overshoot Deviation - Procedural Clearance |
Narrative:
We returned to gate with right engine fluctuations at idle on ground. Maintenance isolated problem to T-12 probe right engine. We performed ground idle check post maintenance at gate. Appeared problem fixed. Normal taxi; takeoff; right engine parameters seen fluctuating again during climb near 10;000 ft. Attempted to level at 13;000 ft. Aircraft floated up to 13;300 ft on left autopilot. Autopilot disconnected; returned to 13;000 ft. Emergency declared with right engine retarded to medium power setting. Auto throttles off. Returned to airport. Set up for fifteen flap single engine type approach with right engine remaining running. All appropriate single engine and emergency descent checklists were performed as applicable.
Original NASA ASRS Text
Title: A B737 flight crew experienced right engine fluctuations during taxi out and returned to the gate for maintenance. On subsequent departure fluctuations return and crew declared an emergency before returning with the affected engine at idle.
Narrative: We returned to gate with right engine fluctuations at idle on ground. Maintenance isolated problem to T-12 probe right engine. We performed ground idle check post maintenance at gate. Appeared problem fixed. Normal taxi; takeoff; right engine parameters seen fluctuating again during climb near 10;000 FT. Attempted to level at 13;000 FT. Aircraft floated up to 13;300 FT on left autopilot. Autopilot disconnected; returned to 13;000 FT. Emergency declared with right engine retarded to medium power setting. Auto throttles off. Returned to airport. Set up for fifteen flap single engine type approach with right engine remaining running. All appropriate single engine and emergency descent checklists were performed as applicable.
Data retrieved from NASA's ASRS site as of April 2012 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.