Local controller described an unauthorized runway crossing event during training on ground control; ...

Narrative:

I was working local control. Ground was training. The developmental had less than 5 hours of experience. A C525 called to taxi. The developmental issued instructions for the aircraft to taxi to runway 13R via bravo; whiskey; lima. The instructor then asked the developmental where the aircraft was. The developmental stated that he did not know. The instructor and the developmental then engage in a discussion about the situation as the aircraft is approaching runway 13L. The aircraft was located on the east side of the field. To taxi the way instructed would require the aircraft cross both active runways. I as the local controller observed the aircraft approaching runway 13L and gave ground control authorization to cross runway 13L. I observed the ground control instructor attempt to clarify the taxi clearance as the aircraft was crossing runway 13L. I then observed the aircraft continue straight on taxiway bravo towards runway 13R. I brought it to ground control's attention that the aircraft was not stopping and appeared to be continuing across runway 13R. The instructor brought the situation to the pilot's attention. The aircraft came to a stop in the middle of runway 13R without authorization from local control. I feel the instructor let the situation go to far. I feel had the instructor controlled first and taught second; this situation would have never happened. The phraseology used was non-standard and confused the pilot. The aircraft should have been issued a clarifying taxi clearance immediately; using standard phraseology.

Original NASA ASRS Text

Title: Local Controller described an unauthorized runway crossing event during training on Ground Control; the reporter indicating the instructor was late in taking the position and used non-standard phraseology leading to the incursion.

Narrative: I was working Local Control. Ground was training. The developmental had less than 5 hours of experience. A C525 called to taxi. The developmental issued instructions for the aircraft to taxi to Runway 13R via Bravo; Whiskey; Lima. The instructor then asked the developmental where the aircraft was. The developmental stated that he did not know. The instructor and the developmental then engage in a discussion about the situation as the aircraft is approaching Runway 13L. The aircraft was located on the east side of the field. To taxi the way instructed would require the aircraft cross both active runways. I as the Local Controller observed the aircraft approaching Runway 13L and gave Ground Control authorization to cross Runway 13L. I observed the Ground Control instructor attempt to clarify the taxi clearance as the aircraft was crossing Runway 13L. I then observed the aircraft continue straight on Taxiway Bravo towards Runway 13R. I brought it to Ground Control's attention that the aircraft was not stopping and appeared to be continuing across Runway 13R. The instructor brought the situation to the pilot's attention. The aircraft came to a stop in the middle of Runway 13R without authorization from Local Control. I feel the instructor let the situation go to far. I feel had the instructor controlled first and taught second; this situation would have never happened. The phraseology used was non-standard and confused the pilot. The aircraft should have been issued a clarifying taxi clearance immediately; using standard phraseology.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1011612
Time
Date	201205
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Citationjet (C525/C526) - CJ I / II / III / IV
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Route In Use	None
Flight Plan	IFR
Person 1
Function	Local
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Deviation - Procedural Clearance Ground Incursion Runway

Local controller described an unauthorized runway crossing event during training on ground control; the reporter indicating the instructor was late in taking the position and used non-standard phraseology leading to the incursion.