Narrative:

During a busy session working ground control, clearance delivery, flight data combined, an small aircraft X called from the GA ramp requesting taxi across airport from east to west to the commuter gate. Many txwys were closed at the time due to construction, forcing a funneling of ground traffic to the midfield taxiway. This funneling of traffic included all jet departures from GA to the long parallel runway on the west side in addition to arrival traffic exiting in both directions on the taxiway, from both parallels. Ahead of small aircraft X was a cpr jet with a similar call sign. The jet was holding short of the first runway (runway 14L) when small aircraft X called. To avoid confusion and ensure pilot understanding, I first crossed the jet at runway 14L and instructed him to hold short of runway 14R and waited for readback emphasizing call sign numbers/letters. I then instructed small aircraft X to hold short of the first runway, runway 14L. Small aircraft X acknowledged and read back 'hold short of runway 14R.' I was so involved with and concentrating on enunciating call signs that I missed the erroneous readback. After reviewing the tape recording, I realized my concentration was on many things and the small aircraft X pilot's muttered readback indicated that he was also doing other things in the cockpit. By the time my attention returned to small aircraft X to check his progress, he was already 1/2 way across runway 14L. Luckily, the landing traffic was still 1/2 mi out on final. Small aircraft X continued on and I instructed him to hold short of runway 14R. In addition to missing an erroneous readback (I heard only what I wanted/expected - - 'hold short of 14...'). The pilot also failed to confirm or question the lack of specific instructions 'cross runway 14L, hold short runway 14R.' I was decertified on ground control and assigned remedial training. The small aircraft pilot got a phone call from the supervisor on duty.

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Original NASA ASRS Text

Title: SMA X RWY INCURSION WITH ACFT ON FINAL APCH. OPDEV. UNAUTH UNCOORD RWY XING.

Narrative: DURING A BUSY SESSION WORKING GND CTL, CLRNC DELIVERY, FLT DATA COMBINED, AN SMA X CALLED FROM THE GA RAMP REQUESTING TAXI ACROSS ARPT FROM E TO W TO THE COMMUTER GATE. MANY TXWYS WERE CLOSED AT THE TIME DUE TO CONSTRUCTION, FORCING A FUNNELING OF GND TFC TO THE MIDFIELD TXWY. THIS FUNNELING OF TFC INCLUDED ALL JET DEPS FROM GA TO THE LONG PARALLEL RWY ON THE W SIDE IN ADDITION TO ARR TFC EXITING IN BOTH DIRECTIONS ON THE TXWY, FROM BOTH PARALLELS. AHEAD OF SMA X WAS A CPR JET WITH A SIMILAR CALL SIGN. THE JET WAS HOLDING SHORT OF THE FIRST RWY (RWY 14L) WHEN SMA X CALLED. TO AVOID CONFUSION AND ENSURE PLT UNDERSTANDING, I FIRST CROSSED THE JET AT RWY 14L AND INSTRUCTED HIM TO HOLD SHORT OF RWY 14R AND WAITED FOR READBACK EMPHASIZING CALL SIGN NUMBERS/LETTERS. I THEN INSTRUCTED SMA X TO HOLD SHORT OF THE FIRST RWY, RWY 14L. SMA X ACKNOWLEDGED AND READ BACK 'HOLD SHORT OF RWY 14R.' I WAS SO INVOLVED WITH AND CONCENTRATING ON ENUNCIATING CALL SIGNS THAT I MISSED THE ERRONEOUS READBACK. AFTER REVIEWING THE TAPE RECORDING, I REALIZED MY CONCENTRATION WAS ON MANY THINGS AND THE SMA X PLT'S MUTTERED READBACK INDICATED THAT HE WAS ALSO DOING OTHER THINGS IN THE COCKPIT. BY THE TIME MY ATTN RETURNED TO SMA X TO CHK HIS PROGRESS, HE WAS ALREADY 1/2 WAY ACROSS RWY 14L. LUCKILY, THE LNDG TFC WAS STILL 1/2 MI OUT ON FINAL. SMA X CONTINUED ON AND I INSTRUCTED HIM TO HOLD SHORT OF RWY 14R. IN ADDITION TO MISSING AN ERRONEOUS READBACK (I HEARD ONLY WHAT I WANTED/EXPECTED - - 'HOLD SHORT OF 14...'). THE PLT ALSO FAILED TO CONFIRM OR QUESTION THE LACK OF SPECIFIC INSTRUCTIONS 'CROSS RWY 14L, HOLD SHORT RWY 14R.' I WAS DECERTIFIED ON GND CTL AND ASSIGNED REMEDIAL TRAINING. THE SMA PLT GOT A PHONE CALL FROM THE SUPVR ON DUTY.

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.