Narrative:

On very short IFR flight from ffz to iwa phoenix radar put us on a downwind for runway 30's and turned us over to iwa tower. Upon initial contact the tower said to plan on runway 30C. On base leg both my first officer and myself thought the tower said clear to land runway 30C. While on final approach it appeared I was too close to a single engine light aircraft. I queried the tower that I was cleared to land on runway 30C. He said negative I was cleared to land on runway 30R. I moved over to runway 30R and landed without incident. Factors affecting the quality of human performance were: 1) tower appeared to be working at maximum workload controling 3 runways. 2) adding to the factors were high performance military jet departing on runway 30L, single engine light aircraft landing on runway 30C, and a high performance cpr jet landing on runway 30R. The good news is I checked what I thought may have been an error by someone and as it turned out it was.

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Original NASA ASRS Text

Title: A MEDIUM WT CPR ACFT ON FINAL TO THE CTR RWY OF 3 PARALLEL RWYS, DETECTED TFC AHEAD FOR THE SAME RWY. AFTER QUESTIONING TWR ABOUT THE CONFLICT, THE RPTR WAS ASSIGNED THE RIGHT RWY.

Narrative: ON VERY SHORT IFR FLT FROM FFZ TO IWA PHOENIX RADAR PUT US ON A DOWNWIND FOR RWY 30'S AND TURNED US OVER TO IWA TWR. UPON INITIAL CONTACT THE TWR SAID TO PLAN ON RWY 30C. ON BASE LEG BOTH MY FO AND MYSELF THOUGHT THE TWR SAID CLR TO LAND RWY 30C. WHILE ON FINAL APCH IT APPEARED I WAS TOO CLOSE TO A SINGLE ENG LIGHT ACFT. I QUERIED THE TWR THAT I WAS CLRED TO LAND ON RWY 30C. HE SAID NEGATIVE I WAS CLRED TO LAND ON RWY 30R. I MOVED OVER TO RWY 30R AND LANDED WITHOUT INCIDENT. FACTORS AFFECTING THE QUALITY OF HUMAN PERFORMANCE WERE: 1) TWR APPEARED TO BE WORKING AT MAX WORKLOAD CTLING 3 RWYS. 2) ADDING TO THE FACTORS WERE HIGH PERFORMANCE MIL JET DEPARTING ON RWY 30L, SINGLE ENG LIGHT ACFT LNDG ON RWY 30C, AND A HIGH PERFORMANCE CPR JET LNDG ON RWY 30R. THE GOOD NEWS IS I CHKED WHAT I THOUGHT MAY HAVE BEEN AN ERROR BY SOMEONE AND AS IT TURNED OUT IT WAS.

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.