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B767 first officer reported hearing a couple of loud popping noises shortly after rotation. After flap retraction there was an audible noise in the cabin accompanied by vibration and the stall buffet feathers on the first officer's ADI remained displayed despite the flaps showing fully retracted. When the flaps are extended the vibration dissipates and the crew elects to dump fuel and return to the departure airport.
| Attributes | |
| ACN | 1196140 |
| Time | |
| Date | 201408 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Component | |
| Aircraft Component | Trailing Edge Flap |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Experience | Flight Crew Last 90 Days 225 Flight Crew Total 5000 Flight Crew Type 3000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
Shortly after rotation we heard a couple of loud popping noises from the aircraft that seemed to come from the right side and aft of the first officer. After flap retraction there was an audible noise in the cabin accompanied by a vibration that could be felt in the floor by the flight attendants from the overwing area forward up into business class. At the same time the stall buffet feathers on the first officer's ADI remained displayed despite both the flap handle and flap indicator showing the flaps were fully retracted. We extended the flaps again and the noise and vibration dissipated; but once we retracted the flaps the noise and vibration returned. We coordinated with ATC to stop our climbout; and called dispatch and maintenance control to seek assistance. With no solution found; we determined that a return to the field would be required. We declared an emergency with center; coordinated dumping fuel with them and then returned. The landing was at 324;000 pounds (overweight) but was very smooth with minimal sink rate at touchdown. We debriefed with maintenance upon arrival and relayed to them all of our indications.
Original NASA ASRS Text
Title: B767 First Officer reported hearing a couple of loud popping noises shortly after rotation. After flap retraction there was an audible noise in the cabin accompanied by vibration and the stall buffet feathers on the First Officer's ADI remained displayed despite the flaps showing fully retracted. When the flaps are extended the vibration dissipates and the crew elects to dump fuel and return to the departure airport.
Narrative: Shortly after rotation we heard a couple of loud popping noises from the aircraft that seemed to come from the right side and aft of the First Officer. After flap retraction there was an audible noise in the cabin accompanied by a vibration that could be felt in the floor by the flight attendants from the overwing area forward up into Business Class. At the same time the stall buffet feathers on the First Officer's ADI remained displayed despite both the flap handle and flap indicator showing the flaps were fully retracted. We extended the flaps again and the noise and vibration dissipated; but once we retracted the flaps the noise and vibration returned. We coordinated with ATC to stop our climbout; and called Dispatch and Maintenance Control to seek assistance. With no solution found; we determined that a return to the field would be required. We declared an emergency with Center; coordinated dumping fuel with them and then returned. The landing was at 324;000 LBS (overweight) but was very smooth with minimal sink rate at touchdown. We debriefed with Maintenance upon arrival and relayed to them all of our indications.
Data retrieved from NASA's ASRS site 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.