Ground conflict at north andover, ma, between C182 and ground vehicle.

Attributes
ACN	478928
Time
Date	200007
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lwm.airport
State Reference	MA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Operator	general aviation : personal
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 30 flight time total : 350 flight time type : 320
ASRS Report	478928
Person 2
Affiliation	other
Function	controller : ground
Qualification	controller : non radar
Events
Anomaly	conflict : ground critical ground encounters : vehicle non adherence : published procedure other anomaly other
Independent Detector	other flight crewa other other : driver 3
Resolutory Action	flight crew : took precautionary avoidance action
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Airport
Primary Problem	ATC Human Performance

Narrative:

On initial call-up to lwm ground, requested a beacon code for VFR flight to ttn, provided the ATIS code, and requested taxi to runway 23. Received and read back taxi instructions and began taxi to runway 23. 75 ft from crossing runway 14/32 (with implicit clearance), I observed a chevy pickup 'taxiing' on runway 32 at approximately 15-20 mph on collision course with me (intersection of taxiway a and runway 32). We both began braking approximately the same time, with the pickup stopping before I could as I continued through the intersection. (A slower taxi speed would have helped me, but it was less than 10 mph already.) as I did my runup, the pickup driver (apparently clearing the airport grounds on patrol) chewed out the ground controller, indicating that he thought ATC had cleared him all over the field. (I did not hear their initial conversation as it was before my engine start.) I believe this was a case of ATC issuing conflicting clrncs.

Original NASA ASRS Text

Title: GND CONFLICT AT NORTH ANDOVER, MA, BTWN C182 AND GND VEHICLE.

Narrative: ON INITIAL CALL-UP TO LWM GND, REQUESTED A BEACON CODE FOR VFR FLT TO TTN, PROVIDED THE ATIS CODE, AND REQUESTED TAXI TO RWY 23. RECEIVED AND READ BACK TAXI INSTRUCTIONS AND BEGAN TAXI TO RWY 23. 75 FT FROM XING RWY 14/32 (WITH IMPLICIT CLRNC), I OBSERVED A CHEVY PICKUP 'TAXIING' ON RWY 32 AT APPROX 15-20 MPH ON COLLISION COURSE WITH ME (INTXN OF TXWY A AND RWY 32). WE BOTH BEGAN BRAKING APPROX THE SAME TIME, WITH THE PICKUP STOPPING BEFORE I COULD AS I CONTINUED THROUGH THE INTXN. (A SLOWER TAXI SPD WOULD HAVE HELPED ME, BUT IT WAS LESS THAN 10 MPH ALREADY.) AS I DID MY RUNUP, THE PICKUP DRIVER (APPARENTLY CLRING THE ARPT GNDS ON PATROL) CHEWED OUT THE GND CTLR, INDICATING THAT HE THOUGHT ATC HAD CLRED HIM ALL OVER THE FIELD. (I DID NOT HEAR THEIR INITIAL CONVERSATION AS IT WAS BEFORE MY ENG START.) I BELIEVE THIS WAS A CASE OF ATC ISSUING CONFLICTING CLRNCS.

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.