Altitude deviation crossing restr missed.

Attributes
ACN	302770
Time
Date	199504
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : fim airport : lax
State Reference	CA
Altitude	msl bound lower : 12000 msl bound upper : 20000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla
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	arrival other arrival star : star enroute airway : zla
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 250 flight time total : 12000 flight time type : 7000
ASRS Report	302770
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : undershoot non adherence : published procedure non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

This was a case of the FMS providing faulty descent data to the flight crew and the flight crew failing to back up the data. Relying on the FMS to show the descent caused us to be too high to cross a published restr. Fortunately, we owned up to the error and were vectored off course in order to return to the restr at the proper altitude. It was embarrassing to us to have committed this error and we felt bad that we interrupted an otherwise smooth flow into one of our nation's busy airports -- lax. This human mistake caused us, once again, to redouble our efforts to be the most professional and meticulous airman possible.

Original NASA ASRS Text

Title: ALTDEV XING RESTR MISSED.

Narrative: THIS WAS A CASE OF THE FMS PROVIDING FAULTY DSCNT DATA TO THE FLC AND THE FLC FAILING TO BACK UP THE DATA. RELYING ON THE FMS TO SHOW THE DSCNT CAUSED US TO BE TOO HIGH TO CROSS A PUBLISHED RESTR. FORTUNATELY, WE OWNED UP TO THE ERROR AND WERE VECTORED OFF COURSE IN ORDER TO RETURN TO THE RESTR AT THE PROPER ALT. IT WAS EMBARRASSING TO US TO HAVE COMMITTED THIS ERROR AND WE FELT BAD THAT WE INTERRUPTED AN OTHERWISE SMOOTH FLOW INTO ONE OF OUR NATION'S BUSY ARPTS -- LAX. THIS HUMAN MISTAKE CAUSED US, ONCE AGAIN, TO REDOUBLE OUR EFFORTS TO BE THE MOST PROFESSIONAL AND METICULOUS AIRMAN POSSIBLE.

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.