Flight crew of an medium large transport overshot descent altitude.

Attributes
ACN	306530
Time
Date	199505
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lga
State Reference	NY
Altitude	msl bound lower : 10500 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	enroute : direct enroute airway : zny
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 8000 flight time type : 3000
ASRS Report	306530
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 other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : became reoriented flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

Descending into ny lga we were cleared to cross somto below 13000 ft descend to 11000 ft. Somehow, the altitude alerter got set to 10000 ft. We ended up dipping down to 10500 before climbing back up to 11000 ft. I remember setting 11000 in the box and neither of us remember putting in 10000 ft, so we don't know how it got there.

Original NASA ASRS Text

Title: FLC OF AN MLG OVERSHOT DSCNT ALT.

Narrative: DSNDING INTO NY LGA WE WERE CLRED TO CROSS SOMTO BELOW 13000 FT DSND TO 11000 FT. SOMEHOW, THE ALT ALERTER GOT SET TO 10000 FT. WE ENDED UP DIPPING DOWN TO 10500 BEFORE CLBING BACK UP TO 11000 FT. I REMEMBER SETTING 11000 IN THE BOX AND NEITHER OF US REMEMBER PUTTING IN 10000 FT, SO WE DON'T KNOW HOW IT GOT THERE.

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.