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B737-300 flight crew experiences a trailing edge flap failure to move to the commanded position during approach. The flaps stopped moving at 2 degrees but the flap handle was moved from 5 to 10 to 15 degrees with no apparent movement. A go-around was initiated without changing gear or flap positions and at some point te flap position was noted at 15 degrees. A 15 degree te flap landing ensues.
| Attributes | |
| ACN | 1061262 |
| Time | |
| Date | 201301 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Route In Use | Visual Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Flap/Slat Indication |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Experience | Flight Crew Last 90 Days 85 Flight Crew Type 85 |
| Person 2 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 94 Flight Crew Type 11800 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
Captain was pilot flying on visual approach. He called for flaps 5 and I moved the handle to that position. Flaps indicator showed slight trailing edge device split and total flap deployment of only two to three degrees rather than the selected five. Overhead leading edge device panel indicated normal leading edge device extension. There was no abnormal roll of the aircraft. Captain then called for flaps 10 and I selected the handle to that position. There was no further movement of the pointers on the trailing edge indicator. However; the leading edge device indicator indicated that leading edge devices had moved to the full extend position. Again; there was no abnormal roll of the aircraft. Captain then called for landing gear down and flaps 15; and I complied with that request. Again; there was no further movement of the pointers on the trailing edge flap indicator. At this point we were rapidly approaching the runway and the captain and I agreed a go-around was necessary. I informed ATC and the captain began a go-around. We concurred that the flaps and landing gear would be left in their current configuration. The captain directed me to run the checklist in the QRH while he flew the aircraft and communicated with ATC. At some point during the go-around; the trailing edge flap indicator moved to the selected (flaps 15) position with no asymmetry. I was momentarily confused with which checklist to use; but chose the flaps trailing edge: symmetrical non-normal/no flaps checklist. The captain concurred. This checklist directed us to land with flaps 15; which we did. While I was running the checklist; the captain declared an emergency as a precaution. We made an uneventful landing; and then taxied to the gate. At the first sign of any abnormal indication; we should have consulted the QRH.
Original NASA ASRS Text
Title: B737-300 flight crew experiences a trailing edge flap failure to move to the commanded position during approach. The flaps stopped moving at 2 degrees but the flap handle was moved from 5 to 10 to 15 degrees with no apparent movement. A go-around was initiated without changing gear or flap positions and at some point TE flap position was noted at 15 degrees. A 15 degree TE flap landing ensues.
Narrative: Captain was Pilot Flying on visual approach. He called for Flaps 5 and I moved the handle to that position. Flaps indicator showed slight trailing edge device split and total flap deployment of only two to three degrees rather than the selected five. Overhead leading edge device panel indicated normal leading edge device extension. There was no abnormal roll of the aircraft. Captain then called for Flaps 10 and I selected the handle to that position. There was no further movement of the pointers on the trailing edge indicator. However; the leading edge device indicator indicated that leading edge devices had moved to the full extend position. Again; there was no abnormal roll of the aircraft. Captain then called for landing gear down and Flaps 15; and I complied with that request. Again; there was no further movement of the pointers on the trailing edge flap indicator. At this point we were rapidly approaching the runway and the Captain and I agreed a go-around was necessary. I informed ATC and the Captain began a go-around. We concurred that the flaps and landing gear would be left in their current configuration. The Captain directed me to run the checklist in the QRH while he flew the aircraft and communicated with ATC. At some point during the go-around; the trailing edge flap indicator moved to the selected (Flaps 15) position with no asymmetry. I was momentarily confused with which checklist to use; but chose the Flaps Trailing Edge: Symmetrical Non-Normal/No Flaps Checklist. The Captain concurred. This checklist directed us to land with Flaps 15; which we did. While I was running the checklist; the Captain declared an emergency as a precaution. We made an uneventful landing; and then taxied to the gate. At the first sign of any abnormal indication; we should have consulted the QRH.
Data retrieved from NASA's ASRS site as of July 2013 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.