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Medium large transport encounters wake turbulence from widebody transport on approach ahead. Slows aircraft.
| Attributes | |
| ACN | 243845 |
| Time | |
| Date | 199306 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : bos |
| State Reference | MA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bos tower : lga |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| 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 |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 11500 flight time type : 6000 |
| ASRS Report | 243845 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | inflight encounter other non adherence : published procedure other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
Visual approach to runway 27, #2 following heavy widebody transport. Bos approach said 'caution wake turbulence.' a few mins later we were maintaining 160 KTS assigned and encountered wake turbulence. I said we were slowing because of wake turbulence. Bos approach said 'negative, maintain 160 KTS, you have 6 NM separation.' I said, 'negative, we are slowing.' we slowed and increased separation to safe distance. ATC often fails to understand wake turbulence and the fact that a medium large transport or large transport, etc, can be in danger behind a widebody transport 3 engine, widebody transport 4 engine, etc. (Bos ATC should review the air carrier medium large transport accident at greater southwest international airport, tx, may xx, 1972.) medium large transport crash because of widebody transport wake turbulence.
Original NASA ASRS Text
Title: MLG ENCOUNTERS WAKE TURB FROM WDB ON APCH AHEAD. SLOWS ACFT.
Narrative: VISUAL APCH TO RWY 27, #2 FOLLOWING HVY WDB. BOS APCH SAID 'CAUTION WAKE TURB.' A FEW MINS LATER WE WERE MAINTAINING 160 KTS ASSIGNED AND ENCOUNTERED WAKE TURB. I SAID WE WERE SLOWING BECAUSE OF WAKE TURB. BOS APCH SAID 'NEGATIVE, MAINTAIN 160 KTS, YOU HAVE 6 NM SEPARATION.' I SAID, 'NEGATIVE, WE ARE SLOWING.' WE SLOWED AND INCREASED SEPARATION TO SAFE DISTANCE. ATC OFTEN FAILS TO UNDERSTAND WAKE TURB AND THE FACT THAT A MLG OR LGT, ETC, CAN BE IN DANGER BEHIND A WDB 3 ENG, WDB 4 ENG, ETC. (BOS ATC SHOULD REVIEW THE ACR MLG ACCIDENT AT GREATER SW INTL ARPT, TX, MAY XX, 1972.) MLG CRASH BECAUSE OF WDB WAKE TURB.
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.