Medium large transport must make quick stop while taxiing to avoid vehicle on taxiway.

Attributes
ACN	292142
Time
Date	199411
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sea
State Reference	WA
Altitude	agl bound lower : 0 agl bound upper : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 8000 flight time type : 1500
ASRS Report	292142
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : ground critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Airport
Air Traffic Incident	other
Situations
Airport	procedure or policy : unspecified

Narrative:

We were cleared to taxi after pushback from concourse D to runway 16L for departure. Passing abeam concourse C to our left and the north satellite to our right just prior to entering taxiway B, I noticed a ground vehicle sbound coming from our right side. When I noticed that the vehicle did not appear to be slowing to give way to our aircraft, I said to captain (who was taxiing aircraft), 'truck coming from the right.' we were taxiing at a slow speed. The captain did not immediately slow aircraft so I applied firm braking to stop. The ground vehicle appeared to brake at about the same time as we did. He came to within 20-40 ft of aircraft. We checked with passenger for injuries due to quick stop. We had ground control track driver of truck to find out his identity. After talking with captain, it turns out that we both must have applied brakes at same moment because we each thought we were the one who stopped aircraft. In retrospect, the very abrupt stop to avoid the vehicle could have been avoided if I had taken control of brakes from captain sooner and had not tried to verbally communicate when there was very little time to evaluate the situation.

Original NASA ASRS Text

Title: MLG MUST MAKE QUICK STOP WHILE TAXIING TO AVOID VEHICLE ON TXWY.

Narrative: WE WERE CLRED TO TAXI AFTER PUSHBACK FROM CONCOURSE D TO RWY 16L FOR DEP. PASSING ABEAM CONCOURSE C TO OUR L AND THE N SATELLITE TO OUR R JUST PRIOR TO ENTERING TXWY B, I NOTICED A GND VEHICLE SBOUND COMING FROM OUR R SIDE. WHEN I NOTICED THAT THE VEHICLE DID NOT APPEAR TO BE SLOWING TO GIVE WAY TO OUR ACFT, I SAID TO CAPT (WHO WAS TAXIING ACFT), 'TRUCK COMING FROM THE R.' WE WERE TAXIING AT A SLOW SPD. THE CAPT DID NOT IMMEDIATELY SLOW ACFT SO I APPLIED FIRM BRAKING TO STOP. THE GND VEHICLE APPEARED TO BRAKE AT ABOUT THE SAME TIME AS WE DID. HE CAME TO WITHIN 20-40 FT OF ACFT. WE CHKED WITH PAX FOR INJURIES DUE TO QUICK STOP. WE HAD GND CTL TRACK DRIVER OF TRUCK TO FIND OUT HIS IDENTITY. AFTER TALKING WITH CAPT, IT TURNS OUT THAT WE BOTH MUST HAVE APPLIED BRAKES AT SAME MOMENT BECAUSE WE EACH THOUGHT WE WERE THE ONE WHO STOPPED ACFT. IN RETROSPECT, THE VERY ABRUPT STOP TO AVOID THE VEHICLE COULD HAVE BEEN AVOIDED IF I HAD TAKEN CTL OF BRAKES FROM CAPT SOONER AND HAD NOT TRIED TO VERBALLY COMMUNICATE WHEN THERE WAS VERY LITTLE TIME TO EVALUATE THE SIT.

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.