Maintenance crosses runway en route to engine test position on airport.

Attributes
ACN	515655
Time
Date	200106
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zlc.artcc
Operator	common carrier : air carrier
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance technician : 8
ASRS Report	515655
Person 2
Affiliation	government : faa
Function	controller : ground
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Environmental Factor Airport Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

We had a 747-400 engine change (#4 engine). For the engine run, we needed a run up pad. Tower gave us 3 run up. I called for clearance and the tower said take (from hangar) taxiway zulu hold short 21R victor, and we did. Then given instruction cross 21R join yankee, tango to 3R run up pad, so we proceeded. Most of this is usually done at night (I work midnights). This was done during the daylight hours. While looking for 3R run up pad/taxiway whiskey (which is off tango), we found ourselves getting very close to runway 3R. Seeing this, I looked quickly left then right to verify no incoming traffic. There wasn't any and we crossed. That is where the mistake was made. Crossing an active runway with out clrncs. I myself have been to 3R run up pad many times in the past. All of which was at night. I have become very familiar with the lights out there at night. So during the day it changed things just enough for this to happen.

Original NASA ASRS Text

Title: MAINT CROSSES RWY ENRTE TO ENG TEST POS ON ARPT.

Narrative: WE HAD A 747-400 ENG CHANGE (#4 ENG). FOR THE ENG RUN, WE NEEDED A RUN UP PAD. TWR GAVE US 3 RUN UP. I CALLED FOR CLRNC AND THE TWR SAID TAKE (FROM HANGAR) TXWY ZULU HOLD SHORT 21R VICTOR, AND WE DID. THEN GIVEN INSTRUCTION CROSS 21R JOIN YANKEE, TANGO TO 3R RUN UP PAD, SO WE PROCEEDED. MOST OF THIS IS USUALLY DONE AT NIGHT (I WORK MIDNIGHTS). THIS WAS DONE DURING THE DAYLIGHT HOURS. WHILE LOOKING FOR 3R RUN UP PAD/TXWY WHISKEY (WHICH IS OFF TANGO), WE FOUND OURSELVES GETTING VERY CLOSE TO RWY 3R. SEEING THIS, I LOOKED QUICKLY LEFT THEN RIGHT TO VERIFY NO INCOMING TFC. THERE WASN'T ANY AND WE CROSSED. THAT IS WHERE THE MISTAKE WAS MADE. CROSSING AN ACTIVE RWY WITH OUT CLRNCS. I MYSELF HAVE BEEN TO 3R RUN UP PAD MANY TIMES IN THE PAST. ALL OF WHICH WAS AT NIGHT. I HAVE BECOME VERY FAMILIAR WITH THE LIGHTS OUT THERE AT NIGHT. SO DURING THE DAY IT CHANGED THINGS JUST ENOUGH FOR THIS TO HAPPEN.

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.