A speed assignment clearance acknowledged by captain but not heard by first officer (PF) led to speed deviation during visual approach. Non adherence ATC clearance.

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Attributes
ACN	321787
Time
Date	199511
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord
State Reference	IL
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord tower : stl
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach descent other
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
ASRS Report	321787
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	321770
Events
Anomaly	non adherence : clearance other anomaly
Independent Detector	other controllera other flight crewa
Resolutory Action	other other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Passing about 7000 ft on descent into ord we were cleared for visual approach direct to runway 27L. I (first officer) was flying and went gear down, flaps 40 degrees early, since we were high. Approaching the marker (wilt), the captain saw I was decelerating and said we were assigned 180 KTS till wilt, a call I had missed. Approach then called and asked our speed and stated we were assigned 180 KTS till wilt. We kept the speed up as long as possible passing wilt and landed normally. Supplemental information from acn 321770: copilot was flying as I was completing the checklist and anti-icing procedures. I noticed we had slowed to 160 KTS and told first officer to speed up to 180 KTS to the marker.

Original NASA ASRS Text

Title: A SPD ASSIGNMENT CLRNC ACKNOWLEDGED BY CAPT BUT NOT HEARD BY FO (PF) LED TO SPD DEV DURING VISUAL APCH. NON ADHERENCE ATC CLRNC.

Narrative: PASSING ABOUT 7000 FT ON DSCNT INTO ORD WE WERE CLRED FOR VISUAL APCH DIRECT TO RWY 27L. I (FO) WAS FLYING AND WENT GEAR DOWN, FLAPS 40 DEGS EARLY, SINCE WE WERE HIGH. APCHING THE MARKER (WILT), THE CAPT SAW I WAS DECELERATING AND SAID WE WERE ASSIGNED 180 KTS TILL WILT, A CALL I HAD MISSED. APCH THEN CALLED AND ASKED OUR SPD AND STATED WE WERE ASSIGNED 180 KTS TILL WILT. WE KEPT THE SPD UP AS LONG AS POSSIBLE PASSING WILT AND LANDED NORMALLY. SUPPLEMENTAL INFO FROM ACN 321770: COPLT WAS FLYING AS I WAS COMPLETING THE CHKLIST AND ANTI-ICING PROCS. I NOTICED WE HAD SLOWED TO 160 KTS AND TOLD FO TO SPD UP TO 180 KTS TO THE MARKER.

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.