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The pilot of an small aircraft hits wake of a C17 that overflew his runway. The reporter feels that the C17 generates a particularly strong and persistent wake.
| Attributes | |
| ACN | 372539 |
| Time | |
| Date | 199706 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : edw |
| State Reference | CA |
| Altitude | agl bound lower : 500 agl bound upper : 500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : edw |
| Operator | general aviation : instructional |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | VFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | C17 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot instruction : instructor |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 250 flight time total : 9000 flight time type : 2000 |
| ASRS Report | 372539 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot instruction : trainee |
| Qualification | pilot : student |
| Events | |
| Anomaly | inflight encounter other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
When on a training flight from south base (edwards AFB, ca), we were on the rosamond departure. Prior to our departure from south base, a C17 departed main base runway 22. The C17 flew over our departure path 5 mins prior to our departure. On our departure, our aircraft hit the wake turbulence from the C17. It was so strong it felt like we impacted the ground. Since we have numerous aircraft that fly over our departure route and have not encountered wake turbulence that severe from any other aircraft, I have to assume the C17's produce greater turbulence than other transports. This same event happened the following day with a C17, but not as severe. It should be investigated as to how much more wake turbulence is created from the C17 than other transports, for the safety of all aircraft. It may be similar to the wake turbulence produced from the B757/767.
Original NASA ASRS Text
Title: THE PLT OF AN SMA HITS WAKE OF A C17 THAT OVERFLEW HIS RWY. THE RPTR FEELS THAT THE C17 GENERATES A PARTICULARLY STRONG AND PERSISTENT WAKE.
Narrative: WHEN ON A TRAINING FLT FROM S BASE (EDWARDS AFB, CA), WE WERE ON THE ROSAMOND DEP. PRIOR TO OUR DEP FROM S BASE, A C17 DEPARTED MAIN BASE RWY 22. THE C17 FLEW OVER OUR DEP PATH 5 MINS PRIOR TO OUR DEP. ON OUR DEP, OUR ACFT HIT THE WAKE TURB FROM THE C17. IT WAS SO STRONG IT FELT LIKE WE IMPACTED THE GND. SINCE WE HAVE NUMEROUS ACFT THAT FLY OVER OUR DEP RTE AND HAVE NOT ENCOUNTERED WAKE TURB THAT SEVERE FROM ANY OTHER ACFT, I HAVE TO ASSUME THE C17'S PRODUCE GREATER TURB THAN OTHER TRANSPORTS. THIS SAME EVENT HAPPENED THE FOLLOWING DAY WITH A C17, BUT NOT AS SEVERE. IT SHOULD BE INVESTIGATED AS TO HOW MUCH MORE WAKE TURB IS CREATED FROM THE C17 THAN OTHER TRANSPORTS, FOR THE SAFETY OF ALL ACFT. IT MAY BE SIMILAR TO THE WAKE TURB PRODUCED FROM THE B757/767.
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.