A boeing 767 flight crew taxied across a runway without a clearance at bos.

Attributes
ACN	444108
Time
Date	199907
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bos.airport
State Reference	MA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 11000 flight time type : 1740
ASRS Report	444108
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : private pilot : multi engine pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 180 flight time total : 9700 flight time type : 1800
ASRS Report	443856
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After landing runway 27 we were instructed to hold short of runway 22 on taxiway west. Holding short on taxiway west we heard instructions to cross runway 22. We read back our flight number and 'cleared to cross runway 22.' after clearing runway 22, we were told we had not been cleared to cross the runway.

Original NASA ASRS Text

Title: A BOEING 767 FLC TAXIED ACROSS A RWY WITHOUT A CLRNC AT BOS.

Narrative: AFTER LNDG RWY 27 WE WERE INSTRUCTED TO HOLD SHORT OF RWY 22 ON TXWY W. HOLDING SHORT ON TXWY W WE HEARD INSTRUCTIONS TO CROSS RWY 22. WE READ BACK OUR FLT NUMBER AND 'CLRED TO CROSS RWY 22.' AFTER CLRING RWY 22, WE WERE TOLD WE HAD NOT BEEN CLRED TO CROSS THE 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.