The crew on a jet cargo charter flight failed to slow to 250 KTS when descending through 10000 ft. Shortly after, the ARTCC radar controller questioned their airspeed and the flight crew began a rapid speed reduction. A crossing restr and best forward speed clearance had been assigned previously.

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Attributes
ACN	334949
Time
Date	199605
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : gsh
State Reference	IN
Altitude	msl bound lower : 7000 msl bound upper : 10000
Environment
Flight Conditions	Mixed
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zau
Operator	common carrier : air taxi
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	descent other
Route In Use	arrival other arrival star : star enroute airway : zau
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 4100 flight time type : 600
ASRS Report	334949
Person 2
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 5100 flight time type : 300
ASRS Report	334950
Events
Anomaly	non adherence : far other anomaly
Independent Detector	other controllera other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ZAU had requested 320 KTS or better. In the descent through 10000 ft to 7000 ft I failed to slow down to 250 KTS. I was still thinking of 320 KTS or greater. As we passed 10000 ft my first officer asked if I was going to maintain best forward airspeed and I replied, did the controller amend our speed restr? About this time center asked about our airspeed. Obviously we slowed immediately. Just west of gsh at 22000 ft we were given a clearance to cross awsum at 10000 ft and out of 11000 ft we were given, descend to 7000 ft. In hurtling down to 10000 ft to make the crossing restr I overlooked slowing down as I descended through 10000 ft! Fatigue also contributed to my lack of situational awareness. Supplemental information from acn 334950: our clearance to 10000 ft was a crossing restr that was given late (close to the fix). Before we reached 10000 ft the new clearance to 7000 ft was given. In the midst of trying to make the restr we neglected to slow down through 10000 ft. Another contributing factor was the busy ATC environment around chicago and that I was busy tuning navaids, talking on the radio, and completing descent and approach checklists. Furthermore we both had been on duty for 12 plus hours, so we were a little tired.

Original NASA ASRS Text

Title: THE CREW ON A JET CARGO CHARTER FLT FAILED TO SLOW TO 250 KTS WHEN DSNDING THROUGH 10000 FT. SHORTLY AFTER, THE ARTCC RADAR CTLR QUESTIONED THEIR AIRSPD AND THE FLC BEGAN A RAPID SPD REDUCTION. A XING RESTR AND BEST FORWARD SPD CLRNC HAD BEEN ASSIGNED PREVIOUSLY.

Narrative: ZAU HAD REQUESTED 320 KTS OR BETTER. IN THE DSCNT THROUGH 10000 FT TO 7000 FT I FAILED TO SLOW DOWN TO 250 KTS. I WAS STILL THINKING OF 320 KTS OR GREATER. AS WE PASSED 10000 FT MY FO ASKED IF I WAS GOING TO MAINTAIN BEST FORWARD AIRSPD AND I REPLIED, DID THE CTLR AMEND OUR SPD RESTR? ABOUT THIS TIME CTR ASKED ABOUT OUR AIRSPD. OBVIOUSLY WE SLOWED IMMEDIATELY. JUST W OF GSH AT 22000 FT WE WERE GIVEN A CLRNC TO CROSS AWSUM AT 10000 FT AND OUT OF 11000 FT WE WERE GIVEN, DSND TO 7000 FT. IN HURTLING DOWN TO 10000 FT TO MAKE THE XING RESTR I OVERLOOKED SLOWING DOWN AS I DSNDED THROUGH 10000 FT! FATIGUE ALSO CONTRIBUTED TO MY LACK OF SITUATIONAL AWARENESS. SUPPLEMENTAL INFO FROM ACN 334950: OUR CLRNC TO 10000 FT WAS A XING RESTR THAT WAS GIVEN LATE (CLOSE TO THE FIX). BEFORE WE REACHED 10000 FT THE NEW CLRNC TO 7000 FT WAS GIVEN. IN THE MIDST OF TRYING TO MAKE THE RESTR WE NEGLECTED TO SLOW DOWN THROUGH 10000 FT. ANOTHER CONTRIBUTING FACTOR WAS THE BUSY ATC ENVIRONMENT AROUND CHICAGO AND THAT I WAS BUSY TUNING NAVAIDS, TALKING ON THE RADIO, AND COMPLETING DSCNT AND APCH CHKLISTS. FURTHERMORE WE BOTH HAD BEEN ON DUTY FOR 12 PLUS HRS, SO WE WERE A LITTLE TIRED.

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.