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A B737-700 flight crew was unable to extend trailing edge flaps symmetrically until directed by maintenance to check the associated circuit breakers. After discovering and resetting an open te skew circuit breaker; the flaps extended fully using the altitude system.
| Attributes | |
| ACN | 965942 |
| Time | |
| Date | 201108 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Flap Control (Trailing & Leading Edge) |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 216 Flight Crew Type 9000 |
| Person 2 | |
| Function | First Officer |
| Experience | Flight Crew Last 90 Days 250 Flight Crew Type 5000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Flaps failed to extend; [so we] ran non-normal flap checklist and began to extend flaps with the altitude system. A skew condition developed; [so we] stopped deployment. [We] declared an emergency and ran the landing numbers for flaps less than one with full leading edge extension. After checklist was completed and while we were burning down fuel; we found right trailing edge skew circuit breaker was out. Reset circuit breaker and extended the flaps with the altitude system and then landed normally.
Original NASA ASRS Text
Title: A B737-700 flight crew was unable to extend trailing edge flaps symmetrically until directed by Maintenance to check the associated circuit breakers. After discovering and resetting an open TE skew CB; the flaps extended fully using the ALT system.
Narrative: Flaps failed to extend; [so we] ran non-normal flap checklist and began to extend flaps with the ALT system. A skew condition developed; [so we] stopped deployment. [We] declared an emergency and ran the landing numbers for flaps less than one with full leading edge extension. After checklist was completed and while we were burning down fuel; we found right trailing edge skew circuit breaker was out. Reset circuit breaker and extended the flaps with the ALT system and then landed normally.
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.