B737 crew had taxiway incursion at sfo.

Attributes
ACN	473420
Time
Date	200005
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sfo.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : sfo.tower
Operator	common carrier : air carrier
Make Model Name	B737-300
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 : 220 flight time total : 8250 flight time type : 3800
ASRS Report	473420
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical incursion : taxiway non adherence : clearance
Independent Detector	other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During taxi out on taxiway B, aircraft developed a maintenance problem requiring radio contact with maintenance. First officer was talking to maintenance on second radio working heads down during taxi. Captain inadvertently taxied past intersection M on taxiway B and was unable to turn back toward the end of runway 1L (intersection M). Continued taxi to runway 1R while notifying ATC of deviation. Held short of runway 1R and eventually taxied back to gate. Next time we will stop taxi, deal with the problem, taxi again when both crew members are heads up.

Original NASA ASRS Text

Title: B737 CREW HAD TXWY INCURSION AT SFO.

Narrative: DURING TAXI OUT ON TXWY B, ACFT DEVELOPED A MAINT PROB REQUIRING RADIO CONTACT WITH MAINT. FO WAS TALKING TO MAINT ON SECOND RADIO WORKING HEADS DOWN DURING TAXI. CAPT INADVERTENTLY TAXIED PAST INTXN M ON TXWY B AND WAS UNABLE TO TURN BACK TOWARD THE END OF RWY 1L (INTXN M). CONTINUED TAXI TO RWY 1R WHILE NOTIFYING ATC OF DEV. HELD SHORT OF RWY 1R AND EVENTUALLY TAXIED BACK TO GATE. NEXT TIME WE WILL STOP TAXI, DEAL WITH THE PROB, TAXI AGAIN WHEN BOTH CREW MEMBERS ARE HEADS UP.

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.