A BE36 pilot, taxiing for takeoff at sjc, lined up with and took off on the parallel taxiway.

Attributes
ACN	539477
Time
Date	200202
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sjc.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Bonanza 36
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff ground : taxi
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 30 flight time total : 1700 flight time type : 1000
ASRS Report	539477
Person 2
Affiliation	government : faa
Function	controller : local
Events
Anomaly	incursion : taxiway non adherence : clearance non adherence : published procedure non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance Airport ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Sjc has dual parallel txwys on east side of runways Y and Z. Ground instructed taxi via taxiway Z to runway 30R. Tower instructed 'position and hold, runway 30R.' pilot taxied into position on runway Y in error. Tower then cleared aircraft for takeoff. Aircraft took off on taxiway Y! Realized misread runway marker after takeoff. No mention of error by tower or pilot. Aircraft departed without incident.

Original NASA ASRS Text

Title: A BE36 PLT, TAXIING FOR TKOF AT SJC, LINED UP WITH AND TOOK OFF ON THE PARALLEL TXWY.

Narrative: SJC HAS DUAL PARALLEL TXWYS ON E SIDE OF RWYS Y AND Z. GND INSTRUCTED TAXI VIA TXWY Z TO RWY 30R. TWR INSTRUCTED 'POS AND HOLD, RWY 30R.' PLT TAXIED INTO POS ON RWY Y IN ERROR. TWR THEN CLRED ACFT FOR TKOF. ACFT TOOK OFF ON TXWY Y! REALIZED MISREAD RWY MARKER AFTER TKOF. NO MENTION OF ERROR BY TWR OR PLT. ACFT DEPARTED WITHOUT INCIDENT.

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.