L1011 on descent has automatic pilot disconnect. Altitude deviation.

Attributes
ACN	330260
Time
Date	199603
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lax
State Reference	CA
Altitude	msl bound lower : 13500 msl bound upper : 14000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla
Operator	common carrier : air carrier
Make Model Name	L-1011 Tri-Star All Series
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	arrival : profile descent arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 60 flight time total : 9000 flight time type : 2000
ASRS Report	330260
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance
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	Aircraft
Air Traffic Incident	other

Narrative:

Autoplt disconnected, at 14500 ft and attempted to reconnect autoplt. Aircraft descended to 13500 ft and leveled off instead of leveling at 14000 ft. Climbed back up to 14000 ft and continued the civet arrival to lax.

Original NASA ASRS Text

Title: L1011 ON DSCNT HAS AUTO PLT DISCONNECT. ALTDEV.

Narrative: AUTOPLT DISCONNECTED, AT 14500 FT AND ATTEMPTED TO RECONNECT AUTOPLT. ACFT DSNDED TO 13500 FT AND LEVELED OFF INSTEAD OF LEVELING AT 14000 FT. CLBED BACK UP TO 14000 FT AND CONTINUED THE CIVET ARR TO LAX.

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.