Altitude deviation.

Attributes
ACN	145558
Time
Date	199005
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : abe
State Reference	PA
Altitude	msl bound lower : 8600 msl bound upper : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : sna
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other enroute airway : zny
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial
Experience	flight time last 90 days : 180 flight time total : 13500 flight time type : 4500
ASRS Report	145558
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

Clearance from 12000 to 9000', first officer flying was accustomed to older and PF with newer autoplt engaged. Approaching 10000' autoplt not slowing the aircraft. First officer overrode manually, causing disconnect of autoplt. First officer began to focus on autoplt/autothrottle functions and allowed aircraft to pass through assigned altitude of 9000'. I had checked off after calling 'out of 10' to make descent passenger announcement. Noticed altitude about 8600' and first officer corrected immediately to 9000'. No other traffic and no ATC calls. The procedures and newer autoplt are appreciably different than procedures, FMS and older autoplt. Reliance on the new to crew equipment should derive only after experience is built.

Original NASA ASRS Text

Title: ALT DEVIATION.

Narrative: CLRNC FROM 12000 TO 9000', F/O FLYING WAS ACCUSTOMED TO OLDER AND PF WITH NEWER AUTOPLT ENGAGED. APCHING 10000' AUTOPLT NOT SLOWING THE ACFT. F/O OVERRODE MANUALLY, CAUSING DISCONNECT OF AUTOPLT. F/O BEGAN TO FOCUS ON AUTOPLT/AUTOTHROTTLE FUNCTIONS AND ALLOWED ACFT TO PASS THROUGH ASSIGNED ALT OF 9000'. I HAD CHKED OFF AFTER CALLING 'OUT OF 10' TO MAKE DSNT PAX ANNOUNCEMENT. NOTICED ALT ABOUT 8600' AND F/O CORRECTED IMMEDIATELY TO 9000'. NO OTHER TFC AND NO ATC CALLS. THE PROCS AND NEWER AUTOPLT ARE APPRECIABLY DIFFERENT THAN PROCS, FMS AND OLDER AUTOPLT. RELIANCE ON THE NEW TO CREW EQUIP SHOULD DERIVE ONLY AFTER EXPERIENCE IS BUILT.

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.