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Flight crew of a B727 on takeoff encounters wake turbulence from a B757 on departure. Heading deviation results and local controller relieves them of the noise abatement procedure.
| Attributes | |
| ACN | 415302 |
| Time | |
| Date | 199809 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : dca airport : dca |
| State Reference | DC |
| Aircraft 1 | |
| Controlling Facilities | tower : dca |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : takeoff climbout : initial |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 415302 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | inflight encounter other non adherence : clearance other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Location: dca. Tower gave us position and hold expect 2 min delay 5 mi in trail of B757. After 20 seconds, we received takeoff clearance with a B737 on final behind us. After takeoff we encountered wake turbulence and ended up on heading 180 degrees. Clearance was to track dca 185 degree radial for noise abatement. Departure control asked why we were off course then canceled noise abatement to expedite climb.
Original NASA ASRS Text
Title: FLC OF A B727 ON TKOF ENCOUNTERS WAKE TURB FROM A B757 ON DEP. HDG DEV RESULTS AND LCL CTLR RELIEVES THEM OF THE NOISE ABATEMENT PROC.
Narrative: LOCATION: DCA. TWR GAVE US POS AND HOLD EXPECT 2 MIN DELAY 5 MI IN TRAIL OF B757. AFTER 20 SECONDS, WE RECEIVED TKOF CLRNC WITH A B737 ON FINAL BEHIND US. AFTER TKOF WE ENCOUNTERED WAKE TURB AND ENDED UP ON HDG 180 DEGS. CLRNC WAS TO TRACK DCA 185 DEG RADIAL FOR NOISE ABATEMENT. DEP CTL ASKED WHY WE WERE OFF COURSE THEN CANCELED NOISE ABATEMENT TO EXPEDITE CLB.
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.