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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Attributes | |
ACN | 339741 |
Time | |
Date | 199606 |
Day | Thu |
Local Time Of Day | 1201 To 1800 |
Place | |
Locale Reference | atc facility : ama |
State Reference | TX |
Altitude | msl bound lower : 31000 msl bound upper : 31300 |
Environment | |
Flight Conditions | VMC |
Light | Daylight |
Aircraft 1 | |
Controlling Facilities | artcc : zfw |
Operator | common carrier : air carrier |
Make Model Name | L-1011 Tri-Star All Series |
Operating Under FAR Part | Part 121 |
Navigation In Use | Other |
Flight Phase | cruise other |
Flight Plan | IFR |
Person 1 | |
Affiliation | company : air carrier |
Function | flight crew : captain oversight : pic |
Qualification | pilot : instrument pilot : atp pilot : flight engineer pilot : commercial |
Experience | flight time last 90 days : 80 flight time total : 25000 flight time type : 80 |
ASRS Report | 339741 |
Person 2 | |
Affiliation | company : air carrier |
Function | flight crew : second officer |
Qualification | pilot : flight engineer pilot : instrument pilot : commercial |
Experience | flight time last 90 days : 150 flight time total : 6000 flight time type : 1400 |
ASRS Report | 339116 |
Events | |
Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance |
Independent Detector | other flight crewa |
Resolutory Action | flight crew : returned to intended course or assigned course |
Consequence | Other |
Supplementary | |
Primary Problem | Flight Crew Human Performance |
Air Traffic Incident | Pilot Deviation |
Narrative:
ATC gave us a 10 degree left turn, at the time we were using FMS (LNAV). The heading switch and the VNAV switch are next to each other. I must have hit the VNAV switch at the same time I pushed the heading switch. We noticed the altitude change as we were passing 31250 ft. The autoplt was kicked off and a recovery to 31000 ft was started. The maximum altitude we reached was 31300 ft.
Original NASA ASRS Text
Title: ALTDEV. EXCURSION FROM ASSIGNED WHEN SELECTING HDG SELECT AND INADVERTENTLY HITTING THE VNAV SWITCH. ACFT CLBED 300 FT, FLC SAW IT AND RETURNED TO ASSIGNED.
Narrative: ATC GAVE US A 10 DEG L TURN, AT THE TIME WE WERE USING FMS (LNAV). THE HDG SWITCH AND THE VNAV SWITCH ARE NEXT TO EACH OTHER. I MUST HAVE HIT THE VNAV SWITCH AT THE SAME TIME I PUSHED THE HDG SWITCH. WE NOTICED THE ALT CHANGE AS WE WERE PASSING 31250 FT. THE AUTOPLT WAS KICKED OFF AND A RECOVERY TO 31000 FT WAS STARTED. THE MAX ALT WE REACHED WAS 31300 FT.
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.