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An air carrier B737 flight crew climb above their assigned altitude while entering data into the FMS for a descent and an increased airspeed.
| Attributes | |
| ACN | 380820 |
| Time | |
| Date | 199709 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : lax |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other cruise other |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 7500 flight time type : 200 |
| ASRS Report | 380820 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified 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:
Upon receiving descent clearance with pilot discretion we also received a restr to maintain 320 KTS or more into lax. I was reprogramming the FMS to comply with this clearance while in VNAV. The aircraft accelerated to 320 KTS and began a shallow climb. I was head down so I am not sure exactly what the captain was doing with the MCP, but when I looked up we were 200 ft off altitude. Captain disengaged autoplt and maximum deviation was approximately 300 ft.
Original NASA ASRS Text
Title: AN ACR B737 FLC CLB ABOVE THEIR ASSIGNED ALT WHILE ENTERING DATA INTO THE FMS FOR A DSCNT AND AN INCREASED AIRSPD.
Narrative: UPON RECEIVING DSCNT CLRNC WITH PLT DISCRETION WE ALSO RECEIVED A RESTR TO MAINTAIN 320 KTS OR MORE INTO LAX. I WAS REPROGRAMMING THE FMS TO COMPLY WITH THIS CLRNC WHILE IN VNAV. THE ACFT ACCELERATED TO 320 KTS AND BEGAN A SHALLOW CLB. I WAS HEAD DOWN SO I AM NOT SURE EXACTLY WHAT THE CAPT WAS DOING WITH THE MCP, BUT WHEN I LOOKED UP WE WERE 200 FT OFF ALT. CAPT DISENGAGED AUTOPLT AND MAX DEV WAS APPROX 300 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.