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The flight crew of a B737-800 declared an emergency and returned to their departure airport when the right side leading edge devices extended at FL340.
| Attributes | |
| ACN | 1086900 |
| Time | |
| Date | 201305 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Flap/Slat Control System |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 280 Flight Crew Total 9000 Flight Crew Type 2500 |
| Person 2 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 220 Flight Crew Total 12000 Flight Crew Type 8000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
The leading edge devices on the starboard side extended at FL340. The cruise mach was .78 and about 270 KIAS. The throttle began to retard to slow to 230 KIAS. We followed the ETOPS procedures taking a 45 degree heading to the north to offset the track by 15 miles. We declared an emergency and coordinated a descent to FL200. At FL200 we executed the QRH procedures which did not resolve the problem. We returned to our departure airport where the captain made a successful overweight landing. On landing the speed brakes (ground spoilers) were extended manually since they did not deploy. During both the preflight walk around and the post flight check the devices appeared normal on the ground.
Original NASA ASRS Text
Title: The flight crew of a B737-800 declared an emergency and returned to their departure airport when the right side leading edge devices extended at FL340.
Narrative: The leading edge devices on the starboard side extended at FL340. The cruise mach was .78 and about 270 KIAS. The throttle began to retard to slow to 230 KIAS. We followed the ETOPS procedures taking a 45 degree heading to the north to offset the track by 15 miles. We declared an emergency and coordinated a descent to FL200. At FL200 we executed the QRH procedures which did not resolve the problem. We returned to our departure airport where the Captain made a successful overweight landing. On landing the speed brakes (ground spoilers) were extended manually since they did not deploy. During both the preflight walk around and the post flight check the devices appeared normal on the ground.
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.