Altitude restr not met.

Attributes
ACN	490750
Time
Date	200010
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zab.airport
State Reference	NM
Altitude	msl single value : 31000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zab.artcc
Operator	general aviation : corporate
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 6010 flight time type : 65
ASRS Report	490750
Person 2
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : crossing restriction not met non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : vert desc. warning other flight crewa
Resolutory Action	flight crew : overrode automation flight crew : became reoriented other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

As a crew, we missed our crossing restr by several thousand ft and approximately 10-15 mi too late. We coupled the FMS for the VNAV descent and continued with other duties (descent checklist, etc). I looked up and saw the vertical descent mode flashing while the PIC took over manually. Our vertical mode got us behind and we missed our restr. I checked the TCASII and no aircraft were present within 15 mi. However, we trusted our equipment and became too complacent. ATC never said anything and gave us a new clearance as we continued inbound for a landing at las, nv. This was also a late trip in which we were a little tired and complacent while expecting our equipment to perform perfectly.

Original NASA ASRS Text

Title: ALT RESTR NOT MET.

Narrative: AS A CREW, WE MISSED OUR XING RESTR BY SEVERAL THOUSAND FT AND APPROX 10-15 MI TOO LATE. WE COUPLED THE FMS FOR THE VNAV DSCNT AND CONTINUED WITH OTHER DUTIES (DSCNT CHKLIST, ETC). I LOOKED UP AND SAW THE VERT DSCNT MODE FLASHING WHILE THE PIC TOOK OVER MANUALLY. OUR VERT MODE GOT US BEHIND AND WE MISSED OUR RESTR. I CHKED THE TCASII AND NO ACFT WERE PRESENT WITHIN 15 MI. HOWEVER, WE TRUSTED OUR EQUIP AND BECAME TOO COMPLACENT. ATC NEVER SAID ANYTHING AND GAVE US A NEW CLRNC AS WE CONTINUED INBOUND FOR A LNDG AT LAS, NV. THIS WAS ALSO A LATE TRIP IN WHICH WE WERE A LITTLE TIRED AND COMPLACENT WHILE EXPECTING OUR EQUIP TO PERFORM PERFECTLY.

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.