Approach controller flight crew miscom runway assignment.

Attributes
ACN	311370
Time
Date	199507
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : clt
State Reference	NC
Altitude	msl bound lower : 3600 msl bound upper : 3600
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : clt
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	other : unknown
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : commercial pilot : atp pilot : instrument
Experience	flight time last 90 days : 240 flight time total : 13580 flight time type : 240
ASRS Report	311370
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe inflight encounter : weather other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 1000
Supplementary
Primary Problem	Weather
Air Traffic Incident	other

Narrative:

Severe thunderstorms in area. Approach changed runway and approach 3 times. Last we heard we were cleared runway 18R ILS then saw another air carrier aircraft ahead. Asked controller. He said turn to 090 degrees intercept runway 18 ILS localizer. Apparently we were cleared through runway 18R localizer to intercept runway 18L localizer and approach. The problem was both controllers had a tremendous amount of traffic and all became confused because thunderstorm had come over field. There was way too much radio congestion and changes in short order that caused this incident. Both pilots and controller were heads up to avoid a conflict.

Original NASA ASRS Text

Title: APCH CTLR FLC MISCOM RWY ASSIGNMENT.

Narrative: SEVERE TSTMS IN AREA. APCH CHANGED RWY AND APCH 3 TIMES. LAST WE HEARD WE WERE CLRED RWY 18R ILS THEN SAW ANOTHER ACR ACFT AHEAD. ASKED CTLR. HE SAID TURN TO 090 DEGS INTERCEPT RWY 18 ILS LOC. APPARENTLY WE WERE CLRED THROUGH RWY 18R LOC TO INTERCEPT RWY 18L LOC AND APCH. THE PROB WAS BOTH CTLRS HAD A TREMENDOUS AMOUNT OF TFC AND ALL BECAME CONFUSED BECAUSE TSTM HAD COME OVER FIELD. THERE WAS WAY TOO MUCH RADIO CONGESTION AND CHANGES IN SHORT ORDER THAT CAUSED THIS INCIDENT. BOTH PLTS AND CTLR WERE HEADS UP TO AVOID A CONFLICT.

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.