Similar sounding aircraft number creates an unauthorized runway entry, runway incursion by a golden swift after the cleared aircraft, a stearman, had experienced a radio problem and cleared the active runway at smx, ca.

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Attributes
ACN	560654
Time
Date	200209
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : smx.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Stearman
Operating Under FAR Part	Part 91
Flight Phase	ground : takeoff roll ground : taxi
Flight Plan	None
Aircraft 2
Controlling Facilities	tower : smx.tower
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Operating Under FAR Part	Part 91
Flight Phase	ground : takeoff roll
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 40 flight time total : 24000 flight time type : 400
ASRS Report	560654
Person 2
Affiliation	other
Function	flight crew : single pilot
Events
Anomaly	conflict : ground critical incursion : runway non adherence : clearance non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took precautionary avoidance action other
Miss Distance	horizontal : 200 vertical : 0
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Local airshow. Waiver airspace from XA00-XC00 and XE00-XG00 local. Several aircraft in run-up pad runway 30 awaiting departure. I was #1, call sign xxabc, swift aircraft call sign xyabc was approximately #6 for departure. My open cockpit stearman radio is intermittently unreliable. I heard smx tower clear, 'abc cleared for immediate takeoff.' I rolled onto runway and tried to acknowledge. My radio failed to transmit, no side-tone. I then saw the swift charging around all the aircraft in the run-up pad. As I now knew I had radio failure, I taxied down the runway and exited at taxiway C. The swift pilot was told to hold position but he claimed he could make a 'formation takeoff.' wrong! Aborting takeoff and clearing the runway seemed the best solution to a worsening situation.

Original NASA ASRS Text

Title: SIMILAR SOUNDING ACFT NUMBER CREATES AN UNAUTH RWY ENTRY, RWY INCURSION BY A GOLDEN SWIFT AFTER THE CLRED ACFT, A STEARMAN, HAD EXPERIENCED A RADIO PROB AND CLRED THE ACTIVE RWY AT SMX, CA.

Narrative: LCL AIRSHOW. WAIVER AIRSPACE FROM XA00-XC00 AND XE00-XG00 LCL. SEVERAL ACFT IN RUN-UP PAD RWY 30 AWAITING DEP. I WAS #1, CALL SIGN XXABC, SWIFT ACFT CALL SIGN XYABC WAS APPROX #6 FOR DEP. MY OPEN COCKPIT STEARMAN RADIO IS INTERMITTENTLY UNRELIABLE. I HEARD SMX TWR CLR, 'ABC CLRED FOR IMMEDIATE TKOF.' I ROLLED ONTO RWY AND TRIED TO ACKNOWLEDGE. MY RADIO FAILED TO XMIT, NO SIDE-TONE. I THEN SAW THE SWIFT CHARGING AROUND ALL THE ACFT IN THE RUN-UP PAD. AS I NOW KNEW I HAD RADIO FAILURE, I TAXIED DOWN THE RWY AND EXITED AT TXWY C. THE SWIFT PLT WAS TOLD TO HOLD POS BUT HE CLAIMED HE COULD MAKE A 'FORMATION TKOF.' WRONG! ABORTING TKOF AND CLRING THE RWY SEEMED THE BEST SOLUTION TO A WORSENING SIT.

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.