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A B737-300 flight crew noticed while approaching 1000 feet AGL; the #2 engine remained at idle and would not respond to throttle inputs.
| Attributes | |
| ACN | 752123 |
| Time | |
| Date | 200709 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : den.airport |
| State Reference | CO |
| Altitude | agl single value : 1000 |
| Aircraft 1 | |
| Controlling Facilities | tower : den.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 200 flight time total : 6000 flight time type : 900 |
| ASRS Report | 752123 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 200 flight time total : 18000 flight time type : 8000 |
| ASRS Report | 752125 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : #2 eng throttle unresponsive |
| Resolutory Action | other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Inside 1500 ft AGL approaching 1000 ft AGL the #2 engine remained at idle and would not respond to throttle inputs. The captain was PF. The aircraft was fully configured flaps 30 degrees. The captain continued to fly noting that something seemed different. I looked at the engine gauges and noticed the #2 engine was at idle power with the throttle pushed forward of the idle stop. I explained the situation to the captain who confirmed what I saw and advanced power on the #1 engine and continued with no other event to a normal landing. Callback conversation with reporter revealed the following information: reporter stated that on approach was when they noticed the #2 engine would not respond to throttle lever movement. Engine remained at idle. No warning lights displayed and all the basic systems (hydraulic; oil; bleeds and electric) functioned normally. This was their second flight leg and he had been using autothrust without any problems until they were descending through 1500 feet AGL. He configured the aircraft for a one engine out landing and only used the #1 engine reverser without any incident. After arriving at the gate and discussing issue with maintenance; it appears the engine had just recently been changed.
Original NASA ASRS Text
Title: A B737-300 FLIGHT CREW NOTICED WHILE APPROACHING 1000 FEET AGL; THE #2 ENGINE REMAINED AT IDLE AND WOULD NOT RESPOND TO THROTTLE INPUTS.
Narrative: INSIDE 1500 FT AGL APCHING 1000 FT AGL THE #2 ENG REMAINED AT IDLE AND WOULD NOT RESPOND TO THROTTLE INPUTS. THE CAPT WAS PF. THE ACFT WAS FULLY CONFIGURED FLAPS 30 DEGS. THE CAPT CONTINUED TO FLY NOTING THAT SOMETHING SEEMED DIFFERENT. I LOOKED AT THE ENG GAUGES AND NOTICED THE #2 ENG WAS AT IDLE PWR WITH THE THROTTLE PUSHED FORWARD OF THE IDLE STOP. I EXPLAINED THE SITUATION TO THE CAPT WHO CONFIRMED WHAT I SAW AND ADVANCED PWR ON THE #1 ENG AND CONTINUED WITH NO OTHER EVENT TO A NORMAL LNDG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THAT ON APPROACH WAS WHEN THEY NOTICED THE #2 ENGINE WOULD NOT RESPOND TO THROTTLE LEVER MOVEMENT. ENGINE REMAINED AT IDLE. NO WARNING LIGHTS DISPLAYED AND ALL THE BASIC SYSTEMS (HYD; OIL; BLEEDS AND ELECTRIC) FUNCTIONED NORMALLY. THIS WAS THEIR SECOND FLIGHT LEG AND HE HAD BEEN USING AUTOTHRUST WITHOUT ANY PROBLEMS UNTIL THEY WERE DESCENDING THROUGH 1500 FEET AGL. HE CONFIGURED THE ACFT FOR A ONE ENGINE OUT LANDING AND ONLY USED THE #1 ENG REVERSER WITHOUT ANY INCIDENT. AFTER ARRIVING AT THE GATE AND DISCUSSING ISSUE WITH MAINT; IT APPEARS THE ENGINE HAD JUST RECENTLY BEEN CHANGED.
Data retrieved from NASA's ASRS site as of January 2009 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.