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C172 instructor pilot reported the engine quit for unknown reasons on the takeoff roll during a touch and go maneuver.
| Attributes | |
| ACN | 1550088 |
| Time | |
| Date | 201806 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Takeoff |
| Route In Use | None |
| Flight Plan | VFR |
| Component | |
| Aircraft Component | Engine |
| Person 1 | |
| Function | Instructor Pilot Flying |
| Qualification | Flight Crew Commercial |
| Experience | Flight Crew Last 90 Days 55 Flight Crew Total 266 Flight Crew Type 230 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
We were doing stop and goes and after the third landing I told my student that I would take controls and do the next takeoff and give him a break. I checked the engine indicating instruments; and I did not notice any indications of reduced performance. During our taxi back I continued to monitor the rpms; and noted that while in a turn at idle power the tachometer indicated about 650 rpms; which didn't seem abnormal. I then did the next takeoff and takeoff performance was normal.two takeoffs later; my student landed the airplane on the runway; I helped him come to a full stop; he added flaps 10 and full power; and the engine sputtered and died. I immediately verified that the mixture was rich; fuel shutoff on; fuel selector on both; turned the fuel pump on; and began cranking; the engine still didn't start; so we notified tower and airport personnel towed us off the runway. While on the runway the tug operator and I noted fuel below the front nose gear on the runway; I believe it was being vented out of the engine; but I'm still not entirely sure if it was leaking out or normal (by the time it was towed back to the maintenance hangar there was still plenty of fuel in both wings and the leaking stopped). There were no significant signs while in the air of the problem's imminence; both on the engine instruments and during the last couple of landings and takeoffs. We were safely towed off the runway and the airplane was delivered back to my company's maintenance personnel.
Original NASA ASRS Text
Title: C172 Instructor Pilot reported the engine quit for unknown reasons on the takeoff roll during a touch and go maneuver.
Narrative: We were doing stop and goes and after the third landing I told my student that I would take controls and do the next takeoff and give him a break. I checked the engine indicating instruments; and I did not notice any indications of reduced performance. During our taxi back I continued to monitor the RPMs; and noted that while in a turn at idle power the tachometer indicated about 650 RPMs; which didn't seem abnormal. I then did the next takeoff and takeoff performance was normal.Two takeoffs later; my student landed the airplane on the runway; I helped him come to a full stop; he added flaps 10 and full power; and the engine sputtered and died. I immediately verified that the mixture was rich; fuel shutoff on; fuel selector on both; turned the fuel pump on; and began cranking; the engine still didn't start; so we notified Tower and airport personnel towed us off the runway. While on the runway the tug operator and I noted fuel below the front nose gear on the runway; I believe it was being vented out of the engine; but I'm still not entirely sure if it was leaking out or normal (by the time it was towed back to the maintenance hangar there was still plenty of fuel in both wings and the leaking stopped). There were no significant signs while in the air of the problem's imminence; both on the engine instruments and during the last couple of landings and takeoffs. We were safely towed off the runway and the airplane was delivered back to my company's maintenance personnel.
Data retrieved from NASA's ASRS site 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.