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Instructor pilot applies excessive braking to CH7A while demonstrating stopping capability to student pilot. Aircraft noses over and strikes propeller.
| Attributes | |
| ACN | 607654 |
| Time | |
| Date | 200402 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : pwt.airport |
| State Reference | WA |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : instructional |
| Make Model Name | Champion Citabria 7ECA |
| Operating Under FAR Part | Part 91 |
| Flight Phase | landing : roll |
| Flight Plan | None |
| Person 1 | |
| Affiliation | other |
| Function | instruction : instructor |
| Qualification | pilot : cfi pilot : multi engine pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 100 flight time total : 3100 flight time type : 150 |
| ASRS Report | 607654 |
| Person 2 | |
| Affiliation | other |
| Function | instruction : trainee |
| Qualification | pilot : instrument pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 400 flight time total : 2250 flight time type : 2250 |
| ASRS Report | 607650 |
| Events | |
| Anomaly | aircraft equipment problem : critical ground encounters other non adherence : published procedure other anomaly |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : unable |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
During a simulated short field landing, the aircraft nosed over and struck the propeller on the ground. The back seat occupant was the PF and during the last few seconds of rollout, I (front seat occupant) applied more brakes to demonstrate that more braking was available. This caused the momentum of the aircraft to carry it forward, onto its nose, which caused the propeller strike. The poh does not recommend braking with the tail off the ground. Advisory circular 61-21A talks about braking with the tail off, but urges caution and says to counter the forward momentum with back pressure from the stick. The 2 main factors in this incident were my (front seat occupant) application of the brakes during a critical phase of flight unexpectedly, and the application of brakes with the tailwheel off the ground which goes against what is recommended by the poh. We are changing company procedures to not allow braking with the tail raised.
Original NASA ASRS Text
Title: INSTRUCTOR PLT APPLIES EXCESSIVE BRAKING TO CH7A WHILE DEMONSTRATING STOPPING CAPABILITY TO STUDENT PLT. ACFT NOSES OVER AND STRIKES PROP.
Narrative: DURING A SIMULATED SHORT FIELD LNDG, THE ACFT NOSED OVER AND STRUCK THE PROP ON THE GND. THE BACK SEAT OCCUPANT WAS THE PF AND DURING THE LAST FEW SECONDS OF ROLLOUT, I (FRONT SEAT OCCUPANT) APPLIED MORE BRAKES TO DEMONSTRATE THAT MORE BRAKING WAS AVAILABLE. THIS CAUSED THE MOMENTUM OF THE ACFT TO CARRY IT FORWARD, ONTO ITS NOSE, WHICH CAUSED THE PROP STRIKE. THE POH DOES NOT RECOMMEND BRAKING WITH THE TAIL OFF THE GND. ADVISORY CIRCULAR 61-21A TALKS ABOUT BRAKING WITH THE TAIL OFF, BUT URGES CAUTION AND SAYS TO COUNTER THE FORWARD MOMENTUM WITH BACK PRESSURE FROM THE STICK. THE 2 MAIN FACTORS IN THIS INCIDENT WERE MY (FRONT SEAT OCCUPANT) APPLICATION OF THE BRAKES DURING A CRITICAL PHASE OF FLT UNEXPECTEDLY, AND THE APPLICATION OF BRAKES WITH THE TAILWHEEL OFF THE GND WHICH GOES AGAINST WHAT IS RECOMMENDED BY THE POH. WE ARE CHANGING COMPANY PROCS TO NOT ALLOW BRAKING WITH THE TAIL RAISED.
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.