His vision partially obscured by condensation, pilot of BE20 taxies onto active runway 35 at slc.

Attributes
ACN	635916
Time
Date	200411
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : slc.airport
State Reference	UT
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight Night
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Super King Air 200 HDC
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	IFR
Aircraft 2
Make Model Name	B737 Undifferentiated or Other Model
Flight Phase	ground : parked
Person 1
Affiliation	company : corporate
Function	flight crew : single pilot
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 90 flight time total : 3050 flight time type : 2200
ASRS Report	635916
Person 2
Affiliation	government : faa
Function	controller : ground
Events
Anomaly	incursion : runway non adherence : clearance non adherence : far
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance Airport
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Single pilot king air captain. First time to slc. Morning departure (XA00), IFR to lit. Windshield had moisture/condensation. I copied clearance and requested taxi from FBO for departure. Ground said, 'taxi to runway 17.' I used wipers to clear windshield, but it only cleared a portion of windshield. The parallel taxiway I should have used was obstructed from my vision by B737 parked long-ways to my left front. I saw an entrance to what I thought was the taxiway to my far left. (I knew the taxiway was a parallel and to my left from the airport diagram.) as I went onto the entrance, I turned right onto what I thought was the parallel. After turning right, I saw touchdown markings in front and realized I was on the active. I called ground and said, 'am I on the active?' ground replied, 'yes, exit next right turn.' I complied. I believe moisture on windshield prevented me from seeing hold short lines, and B737 obstructed my view of correct taxiway. To prevent recurrence, pilots should completely wipe away all moisture or obstructions to vision on windshield prior to taxi. Although I reviewed airport diagram, greater familiarity with airport and situational awareness could have prevented this.

Original NASA ASRS Text

Title: HIS VISION PARTIALLY OBSCURED BY CONDENSATION, PLT OF BE20 TAXIES ONTO ACTIVE RWY 35 AT SLC.

Narrative: SINGLE PLT KING AIR CAPT. FIRST TIME TO SLC. MORNING DEP (XA00), IFR TO LIT. WINDSHIELD HAD MOISTURE/CONDENSATION. I COPIED CLRNC AND REQUESTED TAXI FROM FBO FOR DEP. GND SAID, 'TAXI TO RWY 17.' I USED WIPERS TO CLR WINDSHIELD, BUT IT ONLY CLRED A PORTION OF WINDSHIELD. THE PARALLEL TXWY I SHOULD HAVE USED WAS OBSTRUCTED FROM MY VISION BY B737 PARKED LONG-WAYS TO MY L FRONT. I SAW AN ENTRANCE TO WHAT I THOUGHT WAS THE TXWY TO MY FAR L. (I KNEW THE TXWY WAS A PARALLEL AND TO MY L FROM THE ARPT DIAGRAM.) AS I WENT ONTO THE ENTRANCE, I TURNED R ONTO WHAT I THOUGHT WAS THE PARALLEL. AFTER TURNING R, I SAW TOUCHDOWN MARKINGS IN FRONT AND REALIZED I WAS ON THE ACTIVE. I CALLED GND AND SAID, 'AM I ON THE ACTIVE?' GND REPLIED, 'YES, EXIT NEXT R TURN.' I COMPLIED. I BELIEVE MOISTURE ON WINDSHIELD PREVENTED ME FROM SEEING HOLD SHORT LINES, AND B737 OBSTRUCTED MY VIEW OF CORRECT TXWY. TO PREVENT RECURRENCE, PLTS SHOULD COMPLETELY WIPE AWAY ALL MOISTURE OR OBSTRUCTIONS TO VISION ON WINDSHIELD PRIOR TO TAXI. ALTHOUGH I REVIEWED ARPT DIAGRAM, GREATER FAMILIARITY WITH ARPT AND SITUATIONAL AWARENESS COULD HAVE PREVENTED THIS.

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.