Narrative:

At the time of incident and in the weeks prior, the yuma airport has had construction underway, with several taxiway closures. We called for, received, and read back the following clearance: 'taxi runway 8 via taxiway left.' all the other txwys in the vicinity of the civilian ramp were closed, taxiway left being the only taxiway leading to runway 8. Taxiway left intersects runway 8 approximately midfield. We received no clearance to hold short of any runway, particularly runways intersecting runway 8. On previous days when issued the same clearance we stopped at the intersection of taxiway left and runway 8 only to be told to turn onto the runway and back taxi to the end -- the implication being that since all the other txwys were closed, we should have known to back taxi to the end of runway 8 treating it as a taxiway. We discussed the clearance, and it was decided that the controller wanted us to taxi on taxiway left, and back taxi on runway 8 to the end. We proceeded as such and while taxiing wbound on runway 8, we approached the intersection of runway 8-26 and runway 17-35. I was performing the taxi checklist, but visually cleared the area right of us approaching the intersection. The captain visually cleared left. While crossing the runway the captain then observed a jetstream departing runway 35. He expedited to exit the runway, the jetstream was airborne as it passed nearly over us. Although the taxi clearance may have been a valid one, it was vague, particularly in light of all the construction, taxiway closures and previous clrncs we had received that week. With the variety of aircraft operating at yuma and all the intersecting runways I feel the taxi clearance could have been more clear without adding much verbiage.

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Original NASA ASRS Text

Title: AN ACR EMB120 ENTERS AN ACTIVE RWY WITHOUT CLEARANCE. A CONFLICT WITH A DEPARTING JETSTREAM COMMUTER AIRCRAFT RESULTS.

Narrative: AT THE TIME OF INCIDENT AND IN THE WKS PRIOR, THE YUMA ARPT HAS HAD CONSTRUCTION UNDERWAY, WITH SEVERAL TXWY CLOSURES. WE CALLED FOR, RECEIVED, AND READ BACK THE FOLLOWING CLRNC: 'TAXI RWY 8 VIA TXWY L.' ALL THE OTHER TXWYS IN THE VICINITY OF THE CIVILIAN RAMP WERE CLOSED, TXWY L BEING THE ONLY TXWY LEADING TO RWY 8. TXWY L INTERSECTS RWY 8 APPROX MIDFIELD. WE RECEIVED NO CLRNC TO HOLD SHORT OF ANY RWY, PARTICULARLY RWYS INTERSECTING RWY 8. ON PREVIOUS DAYS WHEN ISSUED THE SAME CLRNC WE STOPPED AT THE INTXN OF TXWY L AND RWY 8 ONLY TO BE TOLD TO TURN ONTO THE RWY AND BACK TAXI TO THE END -- THE IMPLICATION BEING THAT SINCE ALL THE OTHER TXWYS WERE CLOSED, WE SHOULD HAVE KNOWN TO BACK TAXI TO THE END OF RWY 8 TREATING IT AS A TXWY. WE DISCUSSED THE CLRNC, AND IT WAS DECIDED THAT THE CTLR WANTED US TO TAXI ON TXWY L, AND BACK TAXI ON RWY 8 TO THE END. WE PROCEEDED AS SUCH AND WHILE TAXIING WBOUND ON RWY 8, WE APCHED THE INTXN OF RWY 8-26 AND RWY 17-35. I WAS PERFORMING THE TAXI CHKLIST, BUT VISUALLY CLRED THE AREA R OF US APCHING THE INTXN. THE CAPT VISUALLY CLRED L. WHILE XING THE RWY THE CAPT THEN OBSERVED A JETSTREAM DEPARTING RWY 35. HE EXPEDITED TO EXIT THE RWY, THE JETSTREAM WAS AIRBORNE AS IT PASSED NEARLY OVER US. ALTHOUGH THE TAXI CLRNC MAY HAVE BEEN A VALID ONE, IT WAS VAGUE, PARTICULARLY IN LIGHT OF ALL THE CONSTRUCTION, TXWY CLOSURES AND PREVIOUS CLRNCS WE HAD RECEIVED THAT WK. WITH THE VARIETY OF ACFT OPERATING AT YUMA AND ALL THE INTERSECTING RWYS I FEEL THE TAXI CLRNC COULD HAVE BEEN MORE CLR WITHOUT ADDING MUCH VERBIAGE.

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.