Altitude deviation.

Attributes
ACN	316611
Time
Date	199509
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : atl
State Reference	GA
Altitude	msl bound lower : 10000 msl bound upper : 10800
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : atl
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 106 flight time total : 11500 flight time type : 300
ASRS Report	316611
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
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:

Flight was cleared to 10000 ft. Just prior to 9000 ft on climb out the #1 primary flight display and high density screens went blank accompanied by a disconnect of the autoplt. I took over control manually but allowed the aircraft to climb to 10800 ft before recovering to 10000 ft. The incident occurred due to my attention being diverted from flying the aircraft to evaluating the display failures and autoplt disconnect. Contributing factors were the high rate of climb just prior to autoplt disconnect, the absence of an aural altitude warning on this aircraft and the failure of the PNF to make the standard '1000 ft' callout.

Original NASA ASRS Text

Title: ALTDEV.

Narrative: FLT WAS CLRED TO 10000 FT. JUST PRIOR TO 9000 FT ON CLBOUT THE #1 PRIMARY FLT DISPLAY AND HIGH DENSITY SCREENS WENT BLANK ACCOMPANIED BY A DISCONNECT OF THE AUTOPLT. I TOOK OVER CTL MANUALLY BUT ALLOWED THE ACFT TO CLB TO 10800 FT BEFORE RECOVERING TO 10000 FT. THE INCIDENT OCCURRED DUE TO MY ATTN BEING DIVERTED FROM FLYING THE ACFT TO EVALUATING THE DISPLAY FAILURES AND AUTOPLT DISCONNECT. CONTRIBUTING FACTORS WERE THE HIGH RATE OF CLB JUST PRIOR TO AUTOPLT DISCONNECT, THE ABSENCE OF AN AURAL ALT WARNING ON THIS ACFT AND THE FAILURE OF THE PNF TO MAKE THE STANDARD '1000 FT' CALLOUT.

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.