Programmed descent in FMC, VNAV not monitored and crossing restr not met.

Attributes
ACN	327840
Time
Date	199602
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : aml
State Reference	VA
Altitude	msl bound lower : 8000 msl bound upper : 14000
Environment
Flight Conditions	VMC
Light	Night
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 airway : zdc
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 12000 flight time type : 2500
ASRS Report	327840
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : undershoot non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While cruising at 14000 ft, we received clearance to cross aml VOR at 8000 ft. While reviewing the approach with the first officer, we did not notice that vertical navigation mode had disengaged. The aircraft was manually descended, but not in time to make the restr. ATC was notified.

Original NASA ASRS Text

Title: PROGRAMMED DSCNT IN FMC, VNAV NOT MONITORED AND XING RESTR NOT MET.

Narrative: WHILE CRUISING AT 14000 FT, WE RECEIVED CLRNC TO CROSS AML VOR AT 8000 FT. WHILE REVIEWING THE APCH WITH THE FO, WE DID NOT NOTICE THAT VERT NAV MODE HAD DISENGAGED. THE ACFT WAS MANUALLY DSNDED, BUT NOT IN TIME TO MAKE THE RESTR. ATC WAS NOTIFIED.

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.