B737 crew misses crossing altitude restr descending in ZMA airspace.

Attributes
ACN	427680
Time
Date	199902
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : pbi.airport
State Reference	FL
Altitude	msl single value : 45000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zma.artcc
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	arrival : profile descent
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : multi engine pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 220 flight time total : 17000 flight time type : 2000
ASRS Report	427680
Person 2
Affiliation	company : air carrier
Function	flight crew : captain
Qualification	pilot : atp pilot : flight engineer pilot : cfi pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 14000 flight time type : 2000
ASRS Report	427679
Events
Anomaly	altitude deviation : crossing restriction not met non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Clearance to cross 30 DME from pbi VOR at 8000 ft. Prior clearance of descent from FL350 to FL250 already initiated when superseded by this clearance. Failure to monitor FMS resulted in being too high to make altitude restr 30 mi from pbi. When queried by ATC, we advised him we were unable to make restr safely.

Original NASA ASRS Text

Title: B737 CREW MISSES XING ALT RESTR DSNDING IN ZMA AIRSPACE.

Narrative: CLRNC TO CROSS 30 DME FROM PBI VOR AT 8000 FT. PRIOR CLRNC OF DSCNT FROM FL350 TO FL250 ALREADY INITIATED WHEN SUPERSEDED BY THIS CLRNC. FAILURE TO MONITOR FMS RESULTED IN BEING TOO HIGH TO MAKE ALT RESTR 30 MI FROM PBI. WHEN QUERIED BY ATC, WE ADVISED HIM WE WERE UNABLE TO MAKE RESTR SAFELY.

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.