|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||navaid : ilc.vortac|
|Altitude||msl bound lower : 28000|
msl bound upper : 28500
|Controlling Facilities||tower : vhhh.tower|
|Operator||common carrier : charter|
|Make Model Name||Light Transport, Low Wing, 2 Turbojet Eng|
|Flight Phase||cruise : level|
|Affiliation||company : charter|
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : atp|
|Experience||flight time last 90 days : 75|
flight time total : 19700
flight time type : 125
|Anomaly||aircraft equipment problem : less severe|
altitude deviation : overshoot
non adherence : clearance
non adherence : far
|Resolutory Action||flight crew : returned to assigned altitude|
|Problem Areas||Flight Crew Human Performance|
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
Aircraft cleared to FL280. Autoplt in use with altitude capture selected. The aircraft leveled at FL280. Both pilots' attention was then changed to getting proper charts for the next leg and the aircraft drifted up to 28500 ft before corrective action was taken. Center did not take notice of the deviation. This was a case where the crew did not function as a crew and both were engrossed in duties other than watching the airplane. Reason for the autoplt malfunction is not known.
Original NASA ASRS Text
Title: A CHARTER CAPT RPTED THAT THE AUTOPLT DID NOT HOLD THE CAPTURED ALT NEAR SLC, UT.
Narrative: ACFT CLRED TO FL280. AUTOPLT IN USE WITH ALT CAPTURE SELECTED. THE ACFT LEVELED AT FL280. BOTH PLTS' ATTN WAS THEN CHANGED TO GETTING PROPER CHARTS FOR THE NEXT LEG AND THE ACFT DRIFTED UP TO 28500 FT BEFORE CORRECTIVE ACTION WAS TAKEN. CTR DID NOT TAKE NOTICE OF THE DEV. THIS WAS A CASE WHERE THE CREW DID NOT FUNCTION AS A CREW AND BOTH WERE ENGROSSED IN DUTIES OTHER THAN WATCHING THE AIRPLANE. REASON FOR THE AUTOPLT MALFUNCTION IS NOT KNOWN.
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.