Confusion in aircraft identify problem creates a runway incursion.

Attributes
ACN	193737
Time
Date	199111
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : huf
State Reference	IN
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	ground : holding ground other : taxi
Flight Plan	VFR
Aircraft 2
Operator	general aviation : instructional
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	ground : holding ground other : taxi
Flight Plan	VFR
Person 1
Affiliation	Other
Function	instruction : instructor oversight : pic
Qualification	pilot : commercial pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 850 flight time type : 842
ASRS Report	193737
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	incursion : runway non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

An small aircraft Y and an small aircraft X taxiing on the bravo taxiway. Small aircraft X forward of small aircraft Y approaching hold lines on runway 23. Ground control instructed my small aircraft X to hold short of 23 also instructed small aircraft Y to hold at 23. At hold short lines ground instructs aircraft holding at 23 (my small aircraft X) to cross 23. I began to cross runway 23 via bravo. After I began my taxi and was on runway 23 ground instructed, by north number, for the small aircraft Y to cross 23. They thought my north number belonged to the small aircraft Y and vice versa. They wanted the small aircraft Y to hold, but the small aircraft Y used my north number, so he also crossed. From my perspective, I was cleared to cross, but tower got our aircraft north numbers and field position mixed up. He wanted me to cross and the small aircraft Y to hold. But he cleared me without north number and then he used the small aircraft Y's north number so they also crossed.

Original NASA ASRS Text

Title: CONFUSION IN ACFT IDENT PROBLEM CREATES A RWY INCURSION.

Narrative: AN SMA Y AND AN SMA X TAXIING ON THE BRAVO TAXIWAY. SMA X FORWARD OF SMA Y APCHING HOLD LINES ON RWY 23. GND CTL INSTRUCTED MY SMA X TO HOLD SHORT OF 23 ALSO INSTRUCTED SMA Y TO HOLD AT 23. AT HOLD SHORT LINES GND INSTRUCTS ACFT HOLDING AT 23 (MY SMA X) TO CROSS 23. I BEGAN TO CROSS RWY 23 VIA BRAVO. AFTER I BEGAN MY TAXI AND WAS ON RWY 23 GND INSTRUCTED, BY N NUMBER, FOR THE SMA Y TO CROSS 23. THEY THOUGHT MY N NUMBER BELONGED TO THE SMA Y AND VICE VERSA. THEY WANTED THE SMA Y TO HOLD, BUT THE SMA Y USED MY N NUMBER, SO HE ALSO CROSSED. FROM MY PERSPECTIVE, I WAS CLRED TO CROSS, BUT TWR GOT OUR ACFT N NUMBERS AND FIELD POS MIXED UP. HE WANTED ME TO CROSS AND THE SMA Y TO HOLD. BUT HE CLRED ME WITHOUT N NUMBER AND THEN HE USED THE SMA Y'S N NUMBER SO THEY ALSO CROSSED.

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.