An A319 flight crew overshoots their assigned altitude descending 10 mi southwest of ldn, va.

Attributes
ACN	485672
Time
Date	200009
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : ldn.vortac
State Reference	VA
Altitude	msl bound lower : 10300 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iad.tracon tracon : n90.tracon
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Navigation In Use	other other vortac
Flight Phase	descent : intermediate altitude
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 290 flight time total : 11000 flight time type : 1000
ASRS Report	485672
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : multi engine pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 180 flight time total : 6500 flight time type : 2000
Events
Anomaly	non adherence : published procedure non adherence : clearance other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to assigned altitude
Supplementary
Problem Areas	Flight Crew Human Performance Environmental Factor Aircraft
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared to descend to 11000 ft, distraction at 11300 ft while putting on autoplt. Autoflt system reverted to vertical speed mode and descended past 11000 ft. I noticed the deviation at 10800 ft and grabbed the stick (A319), but with autoplt on there was considerable resistance. By the time I kicked off the autoplt and started to climb, we bottomed out at 10400 ft. This trip sequence started in den at XA00, flew to lax and then all night to iad. I feel that my reflexes were considerably slower because of the overnight operation.

Original NASA ASRS Text

Title: AN A319 FLC OVERSHOOTS THEIR ASSIGNED ALT DSNDING 10 MI SW OF LDN, VA.

Narrative: CLRED TO DSND TO 11000 FT, DISTR AT 11300 FT WHILE PUTTING ON AUTOPLT. AUTOFLT SYS REVERTED TO VERT SPD MODE AND DSNDED PAST 11000 FT. I NOTICED THE DEV AT 10800 FT AND GRABBED THE STICK (A319), BUT WITH AUTOPLT ON THERE WAS CONSIDERABLE RESISTANCE. BY THE TIME I KICKED OFF THE AUTOPLT AND STARTED TO CLB, WE BOTTOMED OUT AT 10400 FT. THIS TRIP SEQUENCE STARTED IN DEN AT XA00, FLEW TO LAX AND THEN ALL NIGHT TO IAD. I FEEL THAT MY REFLEXES WERE CONSIDERABLY SLOWER BECAUSE OF THE OVERNIGHT OP.

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.