Non adherence to ATC instruction creates a runway incursion. Air carrier mechanic taxiing medium lar...

Attributes
ACN	199944
Time
Date	199201
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : stl
State Reference	MO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	ground : holding ground other : taxi
Flight Plan	None
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach landing : go around
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	other personnel other other personnel other
Qualification	other other : other pilot : private
Experience	flight time last 90 days : 5 flight time total : 375 flight time type : 0
ASRS Report	199944
Person 2
Affiliation	company : air carrier
Function	observation : observer other personnel other
Qualification	other other : other
Events
Anomaly	conflict : ground less severe incursion : runway non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was taxiing an medium large transport aircraft for a maintenance engine trim run. I have been taxiing this type of aircraft for 12 yrs. I was taxiing from the left seat and in the right seat there was a mechanic completely unfamiliar with taxiing procedures or radio work. It was necessary to change the heading the tower had given us due to the wind. We were told to move to a different location on the airport. The tower gave me clearance to cross runway 31-13 then 12L-30R at the same time. After I had crossed 31-13 there was some confusion in the cockpit and I stopped the aircraft until I could get confirmation from the tower. The nose of the aircraft was over the hold line for 12L-30R but not close to the runway side line. The tower then called and asked why we stopped. When I told him I wasn't sure if I had clearance he said to cross 12L-30R now. As I did a twin engine commuter aircraft did a go around. The tower then called back and said I had caused the go around because I had stopped over the runway hold line. When we were parked in a different run up area the tower called back and asked what the problem was. I explained that I was running the cockpit by myself and that I had become confused about the clearance and had stopped rather than cross an active runway. I wasn't sure about having clearance to cross. I apologized several times for the misunderstanding. The tower made no mention of it again but I thought I should fill this report out anyway.

Original NASA ASRS Text

Title: NON ADHERENCE TO ATC INSTRUCTION CREATES A RWY INCURSION. ACR MECH TAXIING MLG FOR SCHEDULED MAINT PROC GETS DISORIENTATED AND STOPS PAST RWY STOP LINE EVEN THOUGH HE HAD BEEN CLRED ACROSS.

Narrative: I WAS TAXIING AN MLG ACFT FOR A MAINT ENG TRIM RUN. I HAVE BEEN TAXIING THIS TYPE OF ACFT FOR 12 YRS. I WAS TAXIING FROM THE L SEAT AND IN THE R SEAT THERE WAS A MECH COMPLETELY UNFAMILIAR WITH TAXIING PROCS OR RADIO WORK. IT WAS NECESSARY TO CHANGE THE HDG THE TWR HAD GIVEN US DUE TO THE WIND. WE WERE TOLD TO MOVE TO A DIFFERENT LOCATION ON THE ARPT. THE TWR GAVE ME CLRNC TO CROSS RWY 31-13 THEN 12L-30R AT THE SAME TIME. AFTER I HAD CROSSED 31-13 THERE WAS SOME CONFUSION IN THE COCKPIT AND I STOPPED THE ACFT UNTIL I COULD GET CONFIRMATION FROM THE TWR. THE NOSE OF THE ACFT WAS OVER THE HOLD LINE FOR 12L-30R BUT NOT CLOSE TO THE RWY SIDE LINE. THE TWR THEN CALLED AND ASKED WHY WE STOPPED. WHEN I TOLD HIM I WASN'T SURE IF I HAD CLRNC HE SAID TO CROSS 12L-30R NOW. AS I DID A TWIN ENG COMMUTER ACFT DID A GAR. THE TWR THEN CALLED BACK AND SAID I HAD CAUSED THE GAR BECAUSE I HAD STOPPED OVER THE RWY HOLD LINE. WHEN WE WERE PARKED IN A DIFFERENT RUN UP AREA THE TWR CALLED BACK AND ASKED WHAT THE PROBLEM WAS. I EXPLAINED THAT I WAS RUNNING THE COCKPIT BY MYSELF AND THAT I HAD BECOME CONFUSED ABOUT THE CLRNC AND HAD STOPPED RATHER THAN CROSS AN ACTIVE RWY. I WASN'T SURE ABOUT HAVING CLRNC TO CROSS. I APOLOGIZED SEVERAL TIMES FOR THE MISUNDERSTANDING. THE TWR MADE NO MENTION OF IT AGAIN BUT I THOUGHT I SHOULD FILL THIS RPT OUT ANYWAY.

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.

Non adherence to ATC instruction creates a runway incursion. Air carrier mechanic taxiing medium large transport for scheduled maintenance procedure gets disorientated and stops past runway stop line even though he had been cleared across.