Flight crew of F100 fail to follow taxi clearance at cyys and cross closed runway without clearance.

Attributes
ACN	601266
Time
Date	200311
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : cyyz.airport
State Reference	ON
Altitude	agl single value : 0
Aircraft 1
Controlling Facilities	tower : hnl.tower
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
ASRS Report	601266
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance Airport
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After landing at yyz on runway 23, we were cleared by ground control to 'cross RWY33L, txwys, G, east, and hold short of taxiway right.' we misinterpreted this and taxied txwys G, north, B short of taxiway right. We visually cleared crossing runway 33R before crossing, but were technically not verbally cleared to cross this inactive/closed runway. There was no conflict and ground control had no comment in this regard, probably because runway 33R was an inactive/closed runway.

Original NASA ASRS Text

Title: FLT CREW OF F100 FAIL TO FOLLOW TAXI CLRNC AT CYYS AND CROSS CLOSED RWY WITHOUT CLRNC.

Narrative: AFTER LNDG AT YYZ ON RWY 23, WE WERE CLRED BY GND CTL TO 'CROSS RWY33L, TXWYS, G, E, AND HOLD SHORT OF TXWY R.' WE MISINTERPRETED THIS AND TAXIED TXWYS G, N, B SHORT OF TXWY R. WE VISUALLY CLRED XING RWY 33R BEFORE XING, BUT WERE TECHNICALLY NOT VERBALLY CLRED TO CROSS THIS INACTIVE/CLOSED RWY. THERE WAS NO CONFLICT AND GND CTL HAD NO COMMENT IN THIS REGARD, PROBABLY BECAUSE RWY 33R WAS AN INACTIVE/CLOSED RWY.

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.