|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Locale Reference||airport : atl.airport|
|Altitude||msl bound lower : 28000|
msl bound upper : 28300
|Operator||common carrier : air carrier|
|Make Model Name||B727-200|
|Flight Phase||cruise : enroute altitude change|
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Experience||flight time last 90 days : 160|
flight time total : 9000
flight time type : 1100
|Anomaly||aircraft equipment problem : less severe|
altitude deviation : overshoot
non adherence : clearance
other anomaly other
|Resolutory Action||flight crew : returned to assigned altitude|
|Consequence||faa : reviewed incident with flight crew|
|Problem Areas||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
During climb to 28000 ft, as the aircraft reached 28000 ft, it became apparent that the autoplt was malfunctioning and would not level at the selected cruise altitude. I was flying and immediately intervened pushing the aircraft 'over' to return in a expeditious and safe manner back to 28000 ft. Mode C altitude reporting is connected to the left altimeter. The left altimeter indicated as high as 28300 ft. The right altimeter was reading slightly higher. At no time did ATC contact us and advise us of any altitude deviation. At no time was there any conflict with other traffic. There was an FAA examiner in the jump seat who said we handled the malfunction in an appropriate manner. The whole episode lasted only 1 or 2 seconds.
Original NASA ASRS Text
Title: B727-200 CREW HAD AN AUTOPLT NOT LEVEL THE ACFT AT THE SELECTED ALT.
Narrative: DURING CLB TO 28000 FT, AS THE ACFT REACHED 28000 FT, IT BECAME APPARENT THAT THE AUTOPLT WAS MALFUNCTIONING AND WOULD NOT LEVEL AT THE SELECTED CRUISE ALT. I WAS FLYING AND IMMEDIATELY INTERVENED PUSHING THE ACFT 'OVER' TO RETURN IN A EXPEDITIOUS AND SAFE MANNER BACK TO 28000 FT. MODE C ALT RPTING IS CONNECTED TO THE L ALTIMETER. THE L ALTIMETER INDICATED AS HIGH AS 28300 FT. THE R ALTIMETER WAS READING SLIGHTLY HIGHER. AT NO TIME DID ATC CONTACT US AND ADVISE US OF ANY ALTDEV. AT NO TIME WAS THERE ANY CONFLICT WITH OTHER TFC. THERE WAS AN FAA EXAMINER IN THE JUMP SEAT WHO SAID WE HANDLED THE MALFUNCTION IN AN APPROPRIATE MANNER. THE WHOLE EPISODE LASTED ONLY 1 OR 2 SECONDS.
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.