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B737NG flight crew reported they experienced vibration in the yoke on initial climb that they felt could have possibly been related to a wake turbulence encounter on a previous flight.
| Attributes | |
| ACN | 1393203 |
| Time | |
| Date | 201610 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737 Next Generation Undifferentiated |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Flight Plan | IFR |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Type 1285 |
| Person 2 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Type 989 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
Upon takeoff; I noticed an unusual vibration in the yoke. As we retracted the flaps the vibration lessened; as we continued our climb and acceleration it continued to diminish until it was gone by 10000 [feet]. I hand flew the aircraft through FL210 and noticed absolutely no unusual anomalies in the control of the aircraft. The vibration did not reoccur again during the remainder of the flight. Landed with no issues.upon arriving at the gate; the captain called maintenance and asked for a mechanic to come out to the aircraft so we could describe in detail what we experienced to help them diagnose the problem. When the mechanic arrived at the aircraft; the captain began explaining the vibration. She informed him that we had experienced wake turbulence during the previous flight with this aircraft on final approach into [another airport]. We weren't sure if that had anything to do with the vibration but thought it was worth mentioning. As soon as the mechanic heard this he became belligerent and condescending to the captain. He was exasperated that she did not ground the aircraft in [departure station] after experiencing wake turbulence and insisted that she willingly flew a damaged aircraft. We were both shocked and dumbfounded by his accusations as he continued to berate her about grounding an aircraft after experiencing severe wake turbulence as per our SOP. The captain looked at me and asked if I thought it was severe wake turbulence that we had [encountered]. It was not. We never experienced any G loading; loss of altitude or even received a 'bank angle' warning. It was just a rapid roll rate that caught us off guard. As we were discussing this the mechanic threw up his hands; said 'unbelievable' and walked out of the cockpit. Because of his attitude and abrupt departure we never got to explain anything about the vibration which might have helped isolate the problem and have gotten the aircraft back in service quickly.
Original NASA ASRS Text
Title: B737NG flight crew reported they experienced vibration in the yoke on initial climb that they felt could have possibly been related to a wake turbulence encounter on a previous flight.
Narrative: Upon takeoff; I noticed an unusual vibration in the yoke. As we retracted the flaps the vibration lessened; as we continued our climb and acceleration it continued to diminish until it was gone by 10000 [feet]. I hand flew the aircraft through FL210 and noticed absolutely no unusual anomalies in the control of the aircraft. The vibration did not reoccur again during the remainder of the flight. Landed with no issues.Upon arriving at the gate; the Captain called maintenance and asked for a mechanic to come out to the aircraft so we could describe in detail what we experienced to help them diagnose the problem. When the mechanic arrived at the aircraft; the Captain began explaining the vibration. She informed him that we had experienced wake turbulence during the previous flight with this aircraft on final approach into [another airport]. We weren't sure if that had anything to do with the vibration but thought it was worth mentioning. As soon as the mechanic heard this he became belligerent and condescending to the Captain. He was exasperated that she did not ground the aircraft in [departure station] after experiencing wake turbulence and insisted that she willingly flew a damaged aircraft. We were both shocked and dumbfounded by his accusations as he continued to berate her about grounding an aircraft after experiencing severe wake turbulence as per our SOP. The Captain looked at me and asked if I thought it was severe wake turbulence that we had [encountered]. It was not. We never experienced any G loading; loss of altitude or even received a 'bank angle' warning. It was just a rapid roll rate that caught us off guard. As we were discussing this the mechanic threw up his hands; said 'unbelievable' and walked out of the cockpit. Because of his attitude and abrupt departure we never got to explain anything about the vibration which might have helped isolate the problem and have gotten the aircraft back in service quickly.
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.