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MD80 flight crew encountered wake turbulence 100 ft AGL from a B747 that had just landed ahead of them on a parallel runway.
| Attributes | |
| ACN | 541863 |
| Time | |
| Date | 200203 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : lax.airport |
| State Reference | CA |
| Altitude | agl single value : 100 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : lax.tower |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : lax.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 541863 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | inflight encounter : wake turbulence other anomaly other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | controller : issued advisory flight crew : executed go around flight crew : regained aircraft control |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance Environmental Factor |
| Primary Problem | Flight Crew Human Performance |
Narrative:
We were cleared visual approach to runway 24R at lax. F0 was pilot flying. ATC had cleared a B747 to land on runway 24L. We had a visual on the airport and with the B747. ATC did issue a caution about wake turbulence from the preceding B747. The PF did a good job being aware of the wake turbulence and flew slightly high to stay above and slowed the aircraft to gain added distance. Everything was great until 100 ft AGL. We encountered very rapid rolls right then abruptly left. We initiated a go around to escape the wake turbulence and used maximum power doing so. We both have a great awareness of the consequences of this unseen hazard. We did all we could to avoid it. The prevailing wind must have blown the B747 wake directly on our landing runway. I intend to get a full 5 miles behind this type heavy even if the aircraft is landing on a parallel.
Original NASA ASRS Text
Title: MD80 FLC ENCOUNTERED WAKE TURBULENCE 100 FT AGL FROM A B747 THAT HAD JUST LANDED AHEAD OF THEM ON A PARALLEL RWY.
Narrative: WE WERE CLRED VISUAL APCH TO RWY 24R AT LAX. F0 WAS PLT FLYING. ATC HAD CLRED A B747 TO LAND ON RWY 24L. WE HAD A VISUAL ON THE ARPT AND WITH THE B747. ATC DID ISSUE A CAUTION ABOUT WAKE TURBULENCE FROM THE PRECEDING B747. THE PF DID A GOOD JOB BEING AWARE OF THE WAKE TURB AND FLEW SLIGHTLY HIGH TO STAY ABOVE AND SLOWED THE ACFT TO GAIN ADDED DISTANCE. EVERYTHING WAS GREAT UNTIL 100 FT AGL. WE ENCOUNTERED VERY RAPID ROLLS RIGHT THEN ABRUPTLY L. WE INITIATED A GAR TO ESCAPE THE WAKE TURB AND USED MAX PWR DOING SO. WE BOTH HAVE A GREAT AWARENESS OF THE CONSEQUENCES OF THIS UNSEEN HAZARD. WE DID ALL WE COULD TO AVOID IT. THE PREVAILING WIND MUST HAVE BLOWN THE B747 WAKE DIRECTLY ON OUR LNDG RWY. I INTEND TO GET A FULL 5 MILES BEHIND THIS TYPE HEAVY EVEN IF THE ACFT IS LNDG ON A PARALLEL.
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.