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A319 flight crew reported a flap overspeed on approach; citing a wake vortex encounter as contributing.
| Attributes | |
| ACN | 1337578 |
| Time | |
| Date | 201603 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ORD.Airport |
| State Reference | IL |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy Deviation - Speed All Types Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
Approximate 5 KIAS overspeed on a flaps 2 setting on final; ILS prm 10C approach at ord. Instructed to maintain 180 KIAS until rayyy (FAF) by ATC. Heavy 777 wake turbulence (called by ATC to us) was a possible factor in having difficulty keeping the speed at 180 KIAS. Full speed brakes were selected as the airspeed approached 200KIAS for the first time; no relief from acceleration; went to idle thrust; speed dropped back towards 180 KIAS. I then re-engaged the auto thrust system in the incorrect order. I moved the thrust levers into the climb detent and then selected a/thr. This spooled the engines up. I then went to idle thrust; full speed brakes to stop the acceleration. The correction was too late and the speed topped out just shy of 205 KIAS. With flaps 2; gear down; and full speed brakes the airspeed was difficult to keep at 180 KIAS on several more occasions during the approach. We had to remain at flaps 2 given the 180 KIAS speed restriction until rayyy. Once we crossed the FAF; I selected managed speed; the aircraft slowed to on speed and landed without incident. Ground speed was keeping us at around 140 KIAS (approach speed set to 131 KIAS) until short final.
Original NASA ASRS Text
Title: A319 flight crew reported a flap overspeed on approach; citing a wake vortex encounter as contributing.
Narrative: Approximate 5 KIAS overspeed on a flaps 2 setting on final; ILS PRM 10C approach at ORD. Instructed to maintain 180 KIAS until RAYYY (FAF) by ATC. Heavy 777 wake turbulence (called by ATC to us) was a possible factor in having difficulty keeping the speed at 180 KIAS. Full speed brakes were selected as the airspeed approached 200KIAS for the first time; no relief from acceleration; went to idle thrust; speed dropped back towards 180 KIAS. I then re-engaged the auto thrust system in the incorrect order. I moved the thrust levers into the climb detent and then selected A/THR. This spooled the engines up. I then went to idle thrust; full speed brakes to stop the acceleration. The correction was too late and the speed topped out just shy of 205 KIAS. With FLAPS 2; Gear Down; and FULL speed brakes the airspeed was difficult to keep at 180 KIAS on several more occasions during the approach. We had to remain at FLAPS 2 given the 180 KIAS speed restriction until RAYYY. Once we crossed the FAF; I selected Managed Speed; the aircraft slowed to on speed and landed without incident. Ground speed was keeping us at around 140 KIAS (Approach Speed set to 131 KIAS) until short final.
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.