B737 crew did not comply with an altitude crossing restr.

Attributes
ACN	425480
Time
Date	199812
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : brv
State Reference	VA
Altitude	msl bound lower : 10000 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-200
Flight Phase	descent other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi
Experience	flight time last 90 days : 160 flight time total : 11250 flight time type : 1790
ASRS Report	425480
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	altitude deviation : undershoot altitude deviation : crossing restriction not met other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : insufficient time other
Consequence	Other
Supplementary
Air Traffic Incident	Pilot Deviation

Narrative:

While descending on the coatt 3 arrival into iad airport we were given a clearance to cross falko intersection at 10000 ft and 250 KTS. While we were descending through about 12800 ft, I selected 250 KTS on the airspeed bug. ZDC called and stated that we were not going to make the restr. I then noticed that the autoplt had leveled off at 12000 ft to slow to 250 KTS. I had been flying our other type of autoplt lately and this autoplt would continue the descent and then slow. We were level at 10000 ft by 6.8 DME, falko is 10 DME from brv.

Original NASA ASRS Text

Title: B737 CREW DID NOT COMPLY WITH AN ALT XING RESTR.

Narrative: WHILE DSNDING ON THE COATT 3 ARR INTO IAD ARPT WE WERE GIVEN A CLRNC TO CROSS FALKO INTXN AT 10000 FT AND 250 KTS. WHILE WE WERE DSNDING THROUGH ABOUT 12800 FT, I SELECTED 250 KTS ON THE AIRSPD BUG. ZDC CALLED AND STATED THAT WE WERE NOT GOING TO MAKE THE RESTR. I THEN NOTICED THAT THE AUTOPLT HAD LEVELED OFF AT 12000 FT TO SLOW TO 250 KTS. I HAD BEEN FLYING OUR OTHER TYPE OF AUTOPLT LATELY AND THIS AUTOPLT WOULD CONTINUE THE DSCNT AND THEN SLOW. WE WERE LEVEL AT 10000 FT BY 6.8 DME, FALKO IS 10 DME FROM BRV.

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.