A commander 114 pilot crosses the hold short line for runway 12/30 without clearance at mmu, nj.

Attributes
ACN	519119
Time
Date	200107
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mmu.airport
State Reference	NJ
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Commander 114
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	None
Aircraft 2
Controlling Facilities	tower : mmu.tower
Operator	general aviation : personal
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial pilot : cfi pilot : multi engine
Experience	flight time last 90 days : 100 flight time total : 1310 flight time type : 6
ASRS Report	519119
Person 2
Affiliation	other
Function	flight crew : single pilot
Events
Anomaly	conflict : ground critical incursion : runway non adherence : far non adherence : clearance other anomaly other
Independent Detector	other controllerb
Resolutory Action	controller : issued alert flight crew : took evasive action none taken : insufficient time
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 50 vertical : 100
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was given taxi clearance by the local ground controller. At the same time, two other aircraft with similar call signs called for taxi clearance, along with other aircraft. The controller, calling my proper call sign, cleared me to 'taxi to runway 23, hold short.' I read back the instruction and when I released my push to talk switch another of the aircraft with similar call signs was reading back my instructions. There, at this time was a tremendous amount of confusion on the radio, with the controller talking to one airplane, and another aircraft answering and the controller calling the wrong call sign. I continued my taxi. To get to runway 23, the active runway, from the ramp, one must cross runway 12/30. At the time, the tower controller had cleared an aircraft to takeoff on runway 12. As I taxied across the hold short line, the controller yelled for another aircraft to stop. Although he didn't call my call sign, I stopped my airplane, looked to my left and saw the aircraft pass overhead. The corrective actions for this type of incident requires the following: on my part, if I suspect in the slightest that my message to the controller had not been heard, I now wait and call again to confirm. Also at the smaller airports 'C' to 'D', I stop at all runway crossing, look both ways and then proceed.

Original NASA ASRS Text

Title: A COMMANDER 114 PLT CROSSES THE HOLD SHORT LINE FOR RWY 12/30 WITHOUT CLRNC AT MMU, NJ.

Narrative: I WAS GIVEN TAXI CLRNC BY THE LCL GND CTLR. AT THE SAME TIME, TWO OTHER ACFT WITH SIMILAR CALL SIGNS CALLED FOR TAXI CLRNC, ALONG WITH OTHER ACFT. THE CTLR, CALLING MY PROPER CALL SIGN, CLRED ME TO 'TAXI TO RWY 23, HOLD SHORT.' I READ BACK THE INSTRUCTION AND WHEN I RELEASED MY PUSH TO TALK SWITCH ANOTHER OF THE ACFT WITH SIMILAR CALL SIGNS WAS READING BACK MY INSTRUCTIONS. THERE, AT THIS TIME WAS A TREMENDOUS AMOUNT OF CONFUSION ON THE RADIO, WITH THE CTLR TALKING TO ONE AIRPLANE, AND ANOTHER ACFT ANSWERING AND THE CTLR CALLING THE WRONG CALL SIGN. I CONTINUED MY TAXI. TO GET TO RWY 23, THE ACTIVE RWY, FROM THE RAMP, ONE MUST CROSS RWY 12/30. AT THE TIME, THE TWR CTLR HAD CLRED AN ACFT TO TKOF ON RWY 12. AS I TAXIED ACROSS THE HOLD SHORT LINE, THE CTLR YELLED FOR ANOTHER ACFT TO STOP. ALTHOUGH HE DIDN'T CALL MY CALL SIGN, I STOPPED MY AIRPLANE, LOOKED TO MY LEFT AND SAW THE ACFT PASS OVERHEAD. THE CORRECTIVE ACTIONS FOR THIS TYPE OF INCIDENT REQUIRES THE FOLLOWING: ON MY PART, IF I SUSPECT IN THE SLIGHTEST THAT MY MESSAGE TO THE CTLR HAD NOT BEEN HEARD, I NOW WAIT AND CALL AGAIN TO CONFIRM. ALSO AT THE SMALLER ARPTS 'C' TO 'D', I STOP AT ALL RWY CROSSING, LOOK BOTH WAYS AND THEN PROCEED.

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.