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A B737-800 encountered the wake vortices of a B737-900 on approach into ord.
| Attributes | |
| ACN | 1128367 |
| Time | |
| Date | 201311 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ORD.Airport |
| State Reference | IL |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Aircraft 2 | |
| Make Model Name | B737-900 |
| Operating Under FAR Part | Part 121 |
| 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 | ATC Issue All Types Deviation - Procedural Published Material / Policy Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
On initial check-in with ord approach control we were assigned runway 27L. The controller on the second approach control frequency gave us an intercept heading of 290 degrees to intercept the final approach course. Approximately one minute later the controller's instructions were to turn to 250 degrees to re-intercept the final approach course. The pilot not flying informed the controller that our 290 degree intercept heading looked good for [runway] 27L. The controller then stated that our assigned runway is 28C and we needed to turn to 250 degrees and then said 'I am not sure what runway I assigned you'. On our new heading of 250 degrees we intercepted the runway 28C approach course approximately 25 NM out but were now only 3 NM from the proceeding aircraft. We then experienced a wake turbulence event which required the autopilot to be disconnected and power to be added. The pilot not flying informed the controller that we were too close to the preceding aircraft and that we were slowing to 190 KTS. After this event the remainder of the approach and landing were uneventful.
Original NASA ASRS Text
Title: A B737-800 encountered the wake vortices of a B737-900 on approach into ORD.
Narrative: On initial check-in with ORD Approach Control we were assigned Runway 27L. The Controller on the second Approach Control frequency gave us an intercept heading of 290 degrees to intercept the final approach course. Approximately one minute later the Controller's instructions were to turn to 250 degrees to re-intercept the final approach course. The pilot not flying informed the Controller that our 290 degree intercept heading looked good for [Runway] 27L. The Controller then stated that our assigned runway is 28C and we needed to turn to 250 degrees and then said 'I am not sure what runway I assigned you'. On our new heading of 250 degrees we intercepted the Runway 28C approach course approximately 25 NM out but were now only 3 NM from the proceeding aircraft. We then experienced a wake turbulence event which required the autopilot to be disconnected and power to be added. The pilot not flying informed the Controller that we were too close to the preceding aircraft and that we were slowing to 190 KTS. After this event the remainder of the approach and landing were uneventful.
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.