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A PA28-161 with instructor and student pilot on board were on initial climb. They drifted toward a DC9 which had just departed from a parallel runway and flew through the wake turbulence.
| Attributes | |
| ACN | 426362 |
| Time | |
| Date | 199901 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : tys.airport |
| State Reference | TN |
| Altitude | agl single value : 300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : tys.tower |
| Operator | general aviation : instructional |
| Make Model Name | PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : initial |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : tys.tower |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | other |
| Function | instruction : instructor |
| Qualification | pilot : instrument pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 40 flight time total : 750 flight time type : 50 |
| ASRS Report | 426362 |
| Person 2 | |
| Affiliation | other |
| Function | instruction : trainee |
| Qualification | pilot : student pilot : private |
| Events | |
| Anomaly | conflict : nmac non adherence : clearance other spatial deviation |
| Independent Detector | other controllera other flight crewa other flight crewb |
| Resolutory Action | flight crew : took evasive action |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were cleared to takeoff on runway 23L and maintain runway heading. Shortly thereafter, the DC9 was cleared to takeoff on runway 23R. We failed to maintain runway heading and drifted toward the DC9. Both planes took evasive action, but we still flew through the DC9's wingtip vortices. The primary cause of the incident was that both the student and I were concentrating on the directional gyro for heading control and not maintaining an adequate watch outside. Inaccuracy of the directional gyro was a contributing factor.
Original NASA ASRS Text
Title: A PA28-161 WITH INSTRUCTOR AND STUDENT PLT ON BOARD WERE ON INITIAL CLB. THEY DRIFTED TOWARD A DC9 WHICH HAD JUST DEPARTED FROM A PARALLEL RWY AND FLEW THROUGH THE WAKE TURB.
Narrative: WE WERE CLRED TO TKOF ON RWY 23L AND MAINTAIN RWY HDG. SHORTLY THEREAFTER, THE DC9 WAS CLRED TO TKOF ON RWY 23R. WE FAILED TO MAINTAIN RWY HDG AND DRIFTED TOWARD THE DC9. BOTH PLANES TOOK EVASIVE ACTION, BUT WE STILL FLEW THROUGH THE DC9'S WINGTIP VORTICES. THE PRIMARY CAUSE OF THE INCIDENT WAS THAT BOTH THE STUDENT AND I WERE CONCENTRATING ON THE DIRECTIONAL GYRO FOR HDG CTL AND NOT MAINTAINING AN ADEQUATE WATCH OUTSIDE. INACCURACY OF THE DIRECTIONAL GYRO WAS A CONTRIBUTING FACTOR.
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.