Narrative:

Working local control at phl tower, 4 active runways. Previous departure reported metal debris on runway 35. Airport vehicle responded and removed a dead bird. At the same time, a king air departure reports a dead bird at the approach end of runway 27R. Airport vehicle finished removing the first bird and proceeds to runway 27R. I instructed the vehicle to the approach end of runway 27R, but, 'remain clear of runway 35 at all times.' (runway 35 intersects runway 27R, 3000 ft west of runway 27R approach.) vehicle replies 'roger.' about 3 mins later I see the vehicle cross runway 35 with an aircraft on a 1 mi final. I understand all runway hold short instructions require a readback, but the vehicle was only cleared onto the approach end of runway 27R to remove the dead bird. There was no request for additional runway inspection. When I cleared the vehicle on runway 35 for the first bird, I didn't say hold short of runway 27R because he was to go to a very specific place on the runway. So the question is, do I need to give and receive a hold short instruction when the vehicle is given a specific clearance for a specific duty.

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Original NASA ASRS Text

Title: ARPT VEHICLE DOES NOT COMPLY WITH PHL TWR INSTRUCTIONS AND CROSSES RWY WITH ACFT ON 1 MI FINAL.

Narrative: WORKING LCL CTL AT PHL TWR, 4 ACTIVE RWYS. PREVIOUS DEP RPTED METAL DEBRIS ON RWY 35. ARPT VEHICLE RESPONDED AND REMOVED A DEAD BIRD. AT THE SAME TIME, A KING AIR DEP RPTS A DEAD BIRD AT THE APCH END OF RWY 27R. ARPT VEHICLE FINISHED REMOVING THE FIRST BIRD AND PROCEEDS TO RWY 27R. I INSTRUCTED THE VEHICLE TO THE APCH END OF RWY 27R, BUT, 'REMAIN CLR OF RWY 35 AT ALL TIMES.' (RWY 35 INTERSECTS RWY 27R, 3000 FT W OF RWY 27R APCH.) VEHICLE REPLIES 'ROGER.' ABOUT 3 MINS LATER I SEE THE VEHICLE CROSS RWY 35 WITH AN ACFT ON A 1 MI FINAL. I UNDERSTAND ALL RWY HOLD SHORT INSTRUCTIONS REQUIRE A READBACK, BUT THE VEHICLE WAS ONLY CLRED ONTO THE APCH END OF RWY 27R TO REMOVE THE DEAD BIRD. THERE WAS NO REQUEST FOR ADDITIONAL RWY INSPECTION. WHEN I CLRED THE VEHICLE ON RWY 35 FOR THE FIRST BIRD, I DIDN'T SAY HOLD SHORT OF RWY 27R BECAUSE HE WAS TO GO TO A VERY SPECIFIC PLACE ON THE RWY. SO THE QUESTION IS, DO I NEED TO GIVE AND RECEIVE A HOLD SHORT INSTRUCTION WHEN THE VEHICLE IS GIVEN A SPECIFIC CLRNC FOR A SPECIFIC DUTY.

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.