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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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With autothrottles engaged during landing, aircraft bounced and autothrottles began to advance. Reporter first officer, PF, retarded throttles, reversed and normal rollout.
| Attributes | |
| ACN | 336716 |
| Time | |
| Date | 199605 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : den |
| State Reference | CO |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 230 flight time total : 17000 flight time type : 3500 |
| ASRS Report | 336716 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
Flight left cos with an inoperative TCASII which was deferred prior to departure. At about 20 NM south of den at 10000 ft, I (first officer) disengaged the autoplt in preparation for a visual approach to runway 26. I do not remember if I disengaged the autothrottle at that time. Upon clearance to a lower altitude, I called for flight level change, which would have re-engaged the autothrottle. I was checking for traffic more than usual, since we had no TCASII. We were cleared for a visual approach, and during the flare I pulled the throttles to idle. After touchdown, I reached up to reverse the engines. The airplane apparently skipped slightly, and the throttles started forward. I pulled the throttles back and reversed the engines. The autothrottle disengaged and the spoilers deployed. I will obviously redouble my efforts to include the autothrottle in my own prelndg check. I will also be reluctant to do any intentional split mode flying. (I have about 3500 hours in type at 2 airlines, and this is a first for me. I have seen it done before.)
Original NASA ASRS Text
Title: WITH AUTOTHROTTLES ENGAGED DURING LNDG, ACFT BOUNCED AND AUTOTHROTTLES BEGAN TO ADVANCE. RPTR FO, PF, RETARDED THROTTLES, REVERSED AND NORMAL ROLLOUT.
Narrative: FLT LEFT COS WITH AN INOP TCASII WHICH WAS DEFERRED PRIOR TO DEP. AT ABOUT 20 NM S OF DEN AT 10000 FT, I (FO) DISENGAGED THE AUTOPLT IN PREPARATION FOR A VISUAL APCH TO RWY 26. I DO NOT REMEMBER IF I DISENGAGED THE AUTOTHROTTLE AT THAT TIME. UPON CLRNC TO A LOWER ALT, I CALLED FOR FLT LEVEL CHANGE, WHICH WOULD HAVE RE-ENGAGED THE AUTOTHROTTLE. I WAS CHKING FOR TFC MORE THAN USUAL, SINCE WE HAD NO TCASII. WE WERE CLRED FOR A VISUAL APCH, AND DURING THE FLARE I PULLED THE THROTTLES TO IDLE. AFTER TOUCHDOWN, I REACHED UP TO REVERSE THE ENGS. THE AIRPLANE APPARENTLY SKIPPED SLIGHTLY, AND THE THROTTLES STARTED FORWARD. I PULLED THE THROTTLES BACK AND REVERSED THE ENGS. THE AUTOTHROTTLE DISENGAGED AND THE SPOILERS DEPLOYED. I WILL OBVIOUSLY REDOUBLE MY EFFORTS TO INCLUDE THE AUTOTHROTTLE IN MY OWN PRELNDG CHK. I WILL ALSO BE RELUCTANT TO DO ANY INTENTIONAL SPLIT MODE FLYING. (I HAVE ABOUT 3500 HRS IN TYPE AT 2 AIRLINES, AND THIS IS A FIRST FOR ME. I HAVE SEEN IT DONE BEFORE.)
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.