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Passing through the wake of an A321 caused more than 45 degrees of roll that required the use of full control authority by a B737 crew during recovery.
| Attributes | |
| ACN | 814422 |
| Time | |
| Date | 200812 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : clt.airport |
| State Reference | NC |
| Altitude | msl single value : 3000 |
| Environment | |
| Weather Elements | other |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 814422 |
| Events | |
| Anomaly | inflight encounter : wake turbulence other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : exited adverse environment flight crew : regained aircraft control |
| Supplementary | |
| Problem Areas | Environmental Factor Airspace Structure |
| Primary Problem | Environmental Factor |
Narrative:
Following an airbus on a visual 3 mi behind. Encountered wake and rolled more than 45 degrees. Disconnected autoplt and used full control authority to level the wings. Slowed to increase spacing. We asked what kind of airbus and was told an A321. Spacing was good. He was at 4000 ft and passed through our altitude 3 miles ahead in fairly calm conditions. We do not know how heavy he was; but maybe more spacing behind A321 would be better.
Original NASA ASRS Text
Title: PASSING THROUGH THE WAKE OF AN A321 CAUSED MORE THAN 45 DEGS OF ROLL THAT REQUIRED THE USE OF FULL CONTROL AUTHORITY BY A B737 CREW DURING RECOVERY.
Narrative: FOLLOWING AN AIRBUS ON A VISUAL 3 MI BEHIND. ENCOUNTERED WAKE AND ROLLED MORE THAN 45 DEGS. DISCONNECTED AUTOPLT AND USED FULL CONTROL AUTHORITY TO LEVEL THE WINGS. SLOWED TO INCREASE SPACING. WE ASKED WHAT KIND OF AIRBUS AND WAS TOLD AN A321. SPACING WAS GOOD. HE WAS AT 4000 FT AND PASSED THROUGH OUR ALTITUDE 3 MILES AHEAD IN FAIRLY CALM CONDITIONS. WE DO NOT KNOW HOW HEAVY HE WAS; BUT MAYBE MORE SPACING BEHIND A321 WOULD BE BETTER.
Data retrieved from NASA's ASRS site as of May 2009 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.