Flight crew of an large transport undershot their assigned crossing altitude due to misprogramming the FMC. ARTCC radar controller said that there was no conflict.

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Attributes
ACN	420620
Time
Date	199811
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : dbq
State Reference	IA
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Navigation In Use	Other Other
Flight Phase	cruise other descent other
Route In Use	enroute airway : zau
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 18000
ASRS Report	420620
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : undershoot non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Missed FL330 crossing restr 30 mi west of dbq. FMC input was 30 mi east of dbq. Center controller asked when we were 30 mi west of dbq if we would make crossing restr. Initially said yes, until we realized FMC input error. Started descent from FL370 and told controller we would not make restr. Crossed 24 mi west of dbq at FL330. We asked the controller if there was a traffic conflict and she said negative.

Original NASA ASRS Text

Title: FLC OF AN LGT UNDERSHOT THEIR ASSIGNED XING ALT DUE TO MISPROGRAMMING THE FMC. ARTCC RADAR CTLR SAID THAT THERE WAS NO CONFLICT.

Narrative: MISSED FL330 XING RESTR 30 MI W OF DBQ. FMC INPUT WAS 30 MI E OF DBQ. CTR CTLR ASKED WHEN WE WERE 30 MI W OF DBQ IF WE WOULD MAKE XING RESTR. INITIALLY SAID YES, UNTIL WE REALIZED FMC INPUT ERROR. STARTED DSCNT FROM FL370 AND TOLD CTLR WE WOULD NOT MAKE RESTR. CROSSED 24 MI W OF DBQ AT FL330. WE ASKED THE CTLR IF THERE WAS A TFC CONFLICT AND SHE SAID NEGATIVE.

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.