A B757 flight crew was unable to meet a crossing restr which caused an RA in ZMA airspace.

Attributes
ACN	586678
Time
Date	200307
Day	Thu
Place
Locale Reference	intersection : dekal
State Reference	FL
Altitude	msl single value : 8000
Aircraft 1
Controlling Facilities	artcc : zma.artcc tower : phx.tower
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Make Model Name	Mallard
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	586678
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : undershoot conflict : airborne critical non adherence : clearance non adherence : company policies
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Operational Error

Narrative:

Arriving fll, ZMA gave clearance to cross dekal at 6000 ft. Previously, we had been given a 300 ft restr. Accomplished descent as soon as possible, but was unable to meet 6000 ft restr. Notified ZMA. They removed dekal restr and issued clearance to descend, best rate, to 6000 ft. Just as we were switching to approach, we received a TA, then an RA as we were descending through 8000 ft. Aircraft in question was a mallard aircraft at 8000 ft. We followed RA and climbed through 8300 ft. Traffic cleared and we resumed descent.

Original NASA ASRS Text

Title: A B757 FLT CREW WAS UNABLE TO MEET A XING RESTR WHICH CAUSED AN RA IN ZMA AIRSPACE.

Narrative: ARRIVING FLL, ZMA GAVE CLRNC TO CROSS DEKAL AT 6000 FT. PREVIOUSLY, WE HAD BEEN GIVEN A 300 FT RESTR. ACCOMPLISHED DSCNT ASAP, BUT WAS UNABLE TO MEET 6000 FT RESTR. NOTIFIED ZMA. THEY REMOVED DEKAL RESTR AND ISSUED CLRNC TO DSND, BEST RATE, TO 6000 FT. JUST AS WE WERE SWITCHING TO APCH, WE RECEIVED A TA, THEN AN RA AS WE WERE DSNDING THROUGH 8000 FT. ACFT IN QUESTION WAS A MALLARD ACFT AT 8000 FT. WE FOLLOWED RA AND CLBED THROUGH 8300 FT. TFC CLRED AND WE RESUMED DSCNT.

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.