GA instructor has suggestion for placement of hold line at lex.

Attributes
ACN	801498
Time
Date	200807
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lex.airport
State Reference	KY
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	None
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 25 flight time total : 4950 flight time type : 1600
ASRS Report	801498
Person 2
Affiliation	government : faa
Function	controller : local
Events
Independent Detector	other controllera
Supplementary
Problem Areas	Airport Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous

Narrative:

While my student and I were on taxiway a and were complying with a taxi clearance at blue grass airport (lex) to 'taxi to the ramp via a and C;' the ground controller subsequently issued a second clearance to 'hold short of taxiway C on a.' being familiar with the airport; I monitored as my student proceeded up taxiway a and he was applying brakes when the ground controller reminded us to 'hold short of taxiway C on a' a second time. We stopped about 100 ft prior to taxiway C abeam the crash/rescue building. Since we were prompted a second time to hold short of taxiway C on a; it gave us cause to investigate if there was a specific hold short line where both pilots and controllers would know precisely where aircraft would be expected stop and hold short. No hold short lines were in evidence. Note: all GA traffic must proceed on taxiway C to and from the runways/GA parking at lex; so it is routine for incoming aircraft to be directed to hold short until outbound traffic clears taxiway C. Given the frequent need to stop prior to taxiway C on taxiway a; I therefore recommend that the airport paint a hold short line on each side of taxiway C on taxiway a. A little paint would eliminate the uncertainty on the part of the ground controller. Where is he going to stop?

Original NASA ASRS Text

Title: GA INSTRUCTOR HAS SUGGESTION FOR PLACEMENT OF HOLD LINE AT LEX.

Narrative: WHILE MY STUDENT AND I WERE ON TXWY A AND WERE COMPLYING WITH A TAXI CLRNC AT BLUE GRASS ARPT (LEX) TO 'TAXI TO THE RAMP VIA A AND C;' THE GND CTLR SUBSEQUENTLY ISSUED A SECOND CLRNC TO 'HOLD SHORT OF TXWY C ON A.' BEING FAMILIAR WITH THE ARPT; I MONITORED AS MY STUDENT PROCEEDED UP TXWY A AND HE WAS APPLYING BRAKES WHEN THE GND CTLR REMINDED US TO 'HOLD SHORT OF TXWY C ON A' A SECOND TIME. WE STOPPED ABOUT 100 FT PRIOR TO TXWY C ABEAM THE CRASH/RESCUE BUILDING. SINCE WE WERE PROMPTED A SECOND TIME TO HOLD SHORT OF TXWY C ON A; IT GAVE US CAUSE TO INVESTIGATE IF THERE WAS A SPECIFIC HOLD SHORT LINE WHERE BOTH PLTS AND CTLRS WOULD KNOW PRECISELY WHERE ACFT WOULD BE EXPECTED STOP AND HOLD SHORT. NO HOLD SHORT LINES WERE IN EVIDENCE. NOTE: ALL GA TFC MUST PROCEED ON TXWY C TO AND FROM THE RWYS/GA PARKING AT LEX; SO IT IS ROUTINE FOR INCOMING ACFT TO BE DIRECTED TO HOLD SHORT UNTIL OUTBOUND TFC CLRS TXWY C. GIVEN THE FREQUENT NEED TO STOP PRIOR TO TXWY C ON TXWY A; I THEREFORE RECOMMEND THAT THE ARPT PAINT A HOLD SHORT LINE ON EACH SIDE OF TXWY C ON TXWY A. A LITTLE PAINT WOULD ELIMINATE THE UNCERTAINTY ON THE PART OF THE GND CTLR. WHERE IS HE GOING TO STOP?

Data retrieved from NASA's ASRS site as of May 2009 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.