|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1801 To 2400|
|Locale Reference||atc facility : crp|
|Altitude||msl bound lower : 22000|
msl bound upper : 23000
|Controlling Facilities||artcc : zhu|
|Operator||common carrier : air carrier|
|Make Model Name||Medium Large Transport, Low Wing, 2 Turbojet Eng|
|Navigation In Use||Other|
|Flight Phase||climbout : intermediate altitude|
|Route In Use||enroute airway : zhu|
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : atp|
|Experience||flight time last 90 days : 220|
flight time total : 8000
flight time type : 4800
|Function||flight crew : first officer|
|Qualification||pilot : commercial|
pilot : instrument
|Anomaly||altitude deviation : overshoot|
|Independent Detector||other controllera|
|Resolutory Action||flight crew : returned to intended course or assigned course|
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
Climb and maintain FL220. The PNF set in 220 in the MCP panel. The PNF acknowledged FL220. The PNF left the ATC frequency to get the ATIS for crp. While off the frequency the aircraft leveled off. The PNF came back on the frequency and hou center asked what our altitude was. The PNF looked at the altitude and we were at FL230. Center asked us to descend to FL220. No traffic was involved and hou center said, 'no big deal.' the problem could have occurred 1 of 2 ways--one being the last flight of the night, the crew being tired and just setting the wrong altitude in the MCP panel and not paying close enough attention to the altitude set. Being that I set the altitude, I felt I set 220 in the MCP panel. We have had a problem in the past by not getting the knob on the MCP panel to rest in the proper detent. Therefore, it would go to an altitude on either side of the set altitude, in this case the higher detent. I feel this problem is created by rapidly setting the MCP altitude and also shallow detents of the MCP altitude knob.
Original NASA ASRS Text
Title: ALT OVERSHOT ON CLIMB WHEN FMC NOT PROPERLY PROGRAMMED.
Narrative: CLB AND MAINTAIN FL220. THE PNF SET IN 220 IN THE MCP PANEL. THE PNF ACKNOWLEDGED FL220. THE PNF LEFT THE ATC FREQ TO GET THE ATIS FOR CRP. WHILE OFF THE FREQ THE ACFT LEVELED OFF. THE PNF CAME BACK ON THE FREQ AND HOU CENTER ASKED WHAT OUR ALT WAS. THE PNF LOOKED AT THE ALT AND WE WERE AT FL230. CENTER ASKED US TO DSND TO FL220. NO TFC WAS INVOLVED AND HOU CENTER SAID, 'NO BIG DEAL.' THE PROB COULD HAVE OCCURRED 1 OF 2 WAYS--ONE BEING THE LAST FLT OF THE NIGHT, THE CREW BEING TIRED AND JUST SETTING THE WRONG ALT IN THE MCP PANEL AND NOT PAYING CLOSE ENOUGH ATTN TO THE ALT SET. BEING THAT I SET THE ALT, I FELT I SET 220 IN THE MCP PANEL. WE HAVE HAD A PROB IN THE PAST BY NOT GETTING THE KNOB ON THE MCP PANEL TO REST IN THE PROPER DETENT. THEREFORE, IT WOULD GO TO AN ALT ON EITHER SIDE OF THE SET ALT, IN THIS CASE THE HIGHER DETENT. I FEEL THIS PROB IS CREATED BY RAPIDLY SETTING THE MCP ALT AND ALSO SHALLOW DETENTS OF THE MCP ALT KNOB.
Data retrieved from NASA's ASRS site as of August 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.