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Climbing 727 rides the wake turbulence of a dc-10 8-20 mi ahead while climbing from 8000 ft to 23000 ft.
| Attributes | |
| ACN | 292143 |
| Time | |
| Date | 199412 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 8000 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude ground : preflight |
| Route In Use | departure other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : instrument pilot : commercial pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 22000 flight time type : 5600 |
| ASRS Report | 292143 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | inflight encounter other other anomaly other |
| Independent Detector | other flight crewa other other : unspecified cockpit |
| Resolutory Action | flight crew : exited adverse environment flight crew : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | other |
Narrative:
Dc-10 departed ord on runway 22L. Approximately 2 mins later B727 departed same runway. Eastbound turn was uneventful until approximately 8000 ft MSL over lake michigan. 727 controls were very sloppy. Asked departure about distance dc-10 was in front (TCASII did not display this aircraft). Dc-10 was 2000 ft above, 8 mi ahead. Held 250 KIAS through 15000 ft MSL. Controls were not as crisp as usual. Stayed outside turn to gij. Engaged autoplt out of 20000 ft MSL. Turned over gij to 089 degree radial, dc-10 was 20 NM ahead and 2000 ft above. Approximately 23000 ft wings rocked several times and modest shudder of airframe. Airspeed decayed 20-25 KTS. Eased nose over and offset the airway approximately 1/2 DOT to upwind side. Flight continued without further incident.
Original NASA ASRS Text
Title: CLBING 727 RIDES THE WAKE TURB OF A DC-10 8-20 MI AHEAD WHILE CLBING FROM 8000 FT TO 23000 FT.
Narrative: DC-10 DEPARTED ORD ON RWY 22L. APPROX 2 MINS LATER B727 DEPARTED SAME RWY. EBOUND TURN WAS UNEVENTFUL UNTIL APPROX 8000 FT MSL OVER LAKE MICHIGAN. 727 CTLS WERE VERY SLOPPY. ASKED DEP ABOUT DISTANCE DC-10 WAS IN FRONT (TCASII DID NOT DISPLAY THIS ACFT). DC-10 WAS 2000 FT ABOVE, 8 MI AHEAD. HELD 250 KIAS THROUGH 15000 FT MSL. CTLS WERE NOT AS CRISP AS USUAL. STAYED OUTSIDE TURN TO GIJ. ENGAGED AUTOPLT OUT OF 20000 FT MSL. TURNED OVER GIJ TO 089 DEG RADIAL, DC-10 WAS 20 NM AHEAD AND 2000 FT ABOVE. APPROX 23000 FT WINGS ROCKED SEVERAL TIMES AND MODEST SHUDDER OF AIRFRAME. AIRSPD DECAYED 20-25 KTS. EASED NOSE OVER AND OFFSET THE AIRWAY APPROX 1/2 DOT TO UPWIND SIDE. FLT CONTINUED WITHOUT FURTHER INCIDENT.
Data retrieved from NASA's ASRS site as of July 2007 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.