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Temporary loss of aircraft control in landing procedure rollout braking action. Aircraft equipment design problem.
| Attributes | |
| ACN | 208094 |
| Time | |
| Date | 199204 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sql |
| State Reference | CA |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : instructional |
| Make Model Name | Small Aircraft |
| Flight Phase | landing other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | instruction : instructor oversight : pic |
| Qualification | pilot : cfi pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 75 flight time total : 1450 flight time type : 35 |
| ASRS Report | 208094 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot instruction : trainee |
| Qualification | pilot : private |
| Experience | flight time total : 175 flight time type : 1 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure other anomaly other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : regained aircraft control other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
This was an aircraft chkout in an small aircraft concurrent with a biennial flight review I was giving. People had always warned me about the strength and pedal geometry of the brakes. The pedals are positioned so that it is easy for an inexperienced pilot to be on the brakes and think he's on the rudder. This was the student's second landing in type. On touchdown, I could hear and feel that the student was on the brakes. I assumed he was experimenting with heavy braking to see how rapidly we could decelerate. I had briefed him on the brakes in this aircraft. As we continued the landing roll, I started to hear the left tire squealing. I started to open my mouth to tell him to lighten up on the brakes, when I heard a bang, and the nose started yawing to the left. I took control, and took the next left intersection. We shut down on the taxiway well clear of the runway. This would not have happened if I had not assumed he knew what he was doing. He had about 175 hours and was a competent pilot, just unfamiliar with the type. This also could have been avoided if I were more aggressive in the situation. I should not have hesitated to 'call him off' the brakes.
Original NASA ASRS Text
Title: TEMPORARY LOSS OF ACFT CTL IN LNDG PROC ROLLOUT BRAKING ACTION. ACFT EQUIP DESIGN PROBLEM.
Narrative: THIS WAS AN ACFT CHKOUT IN AN SMA CONCURRENT WITH A BIENNIAL FLT REVIEW I WAS GIVING. PEOPLE HAD ALWAYS WARNED ME ABOUT THE STRENGTH AND PEDAL GEOMETRY OF THE BRAKES. THE PEDALS ARE POSITIONED SO THAT IT IS EASY FOR AN INEXPERIENCED PLT TO BE ON THE BRAKES AND THINK HE'S ON THE RUDDER. THIS WAS THE STUDENT'S SECOND LNDG IN TYPE. ON TOUCHDOWN, I COULD HEAR AND FEEL THAT THE STUDENT WAS ON THE BRAKES. I ASSUMED HE WAS EXPERIMENTING WITH HVY BRAKING TO SEE HOW RAPIDLY WE COULD DECELERATE. I HAD BRIEFED HIM ON THE BRAKES IN THIS ACFT. AS WE CONTINUED THE LNDG ROLL, I STARTED TO HEAR THE L TIRE SQUEALING. I STARTED TO OPEN MY MOUTH TO TELL HIM TO LIGHTEN UP ON THE BRAKES, WHEN I HEARD A BANG, AND THE NOSE STARTED YAWING TO THE L. I TOOK CTL, AND TOOK THE NEXT L INTXN. WE SHUT DOWN ON THE TAXIWAY WELL CLR OF THE RWY. THIS WOULD NOT HAVE HAPPENED IF I HAD NOT ASSUMED HE KNEW WHAT HE WAS DOING. HE HAD ABOUT 175 HRS AND WAS A COMPETENT PLT, JUST UNFAMILIAR WITH THE TYPE. THIS ALSO COULD HAVE BEEN AVOIDED IF I WERE MORE AGGRESSIVE IN THE SITUATION. I SHOULD NOT HAVE HESITATED TO 'CALL HIM OFF' THE BRAKES.
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.