A jetstream 32 flight crew and clt approach differed in their opinion of assigned airspeed.

Attributes
ACN	437710
Time
Date	199905
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : clt.vortac
Altitude	msl single value : 3600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : clt.tracon tracon : mco.tracon
Operator	common carrier : air carrier
Make Model Name	Jetstream 32
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 260 flight time total : 7000 flight time type : 1500
ASRS Report	437710
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	other anomaly
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

Last acknowledged speed was 210 KTS on visual approach to runway 18L in clt. Frequency was very busy. Controller asked us if we were doing 170 KIAS. We responded that last given was 210 KTS. Both controller and flight crew thought they were right. With frequency congestion flight crew could have been wrong. Best solution is to always verify and xchk. No conflict occurred.

Original NASA ASRS Text

Title: A JETSTREAM 32 FLC AND CLT APCH DIFFERED IN THEIR OPINION OF ASSIGNED AIRSPD.

Narrative: LAST ACKNOWLEDGED SPD WAS 210 KTS ON VISUAL APCH TO RWY 18L IN CLT. FREQ WAS VERY BUSY. CTLR ASKED US IF WE WERE DOING 170 KIAS. WE RESPONDED THAT LAST GIVEN WAS 210 KTS. BOTH CTLR AND FLC THOUGHT THEY WERE RIGHT. WITH FREQ CONGESTION FLC COULD HAVE BEEN WRONG. BEST SOLUTION IS TO ALWAYS VERIFY AND XCHK. NO CONFLICT OCCURRED.

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.