SMT Y WAS CLRED TO LAND ON OCCUPIED RWY OVER THE TOP OF ACR X HOLDING IN POS. LTSS. SYS ERROR. PLTDEV.

Narrative

ACR X CLRED INTO POS TO HOLD ON RWY 17 BY HOBBY TWR. WE VISUALLY CHKED THE FINAL APCH AND DID NOT SEE ANY TFC. WE WERE ON THE CENTERLINE OF THE RWY JUST SETTING THE PARKING BRAKE WHEN SMT Y PASSED DIRECTLY OVER US AT AN ESTIMATED ALT OF 30-40 FT; AND LANDED IN FRONT OF US ON RWY 17. CAUSE UNKNOWN. HOBBY TWR IS INVESTIGATING THE INCIDENT. SUPPLEMENTAL INFO FROM ACN 190641. ACR X ON FLT FROM HOU-MAF WAS CLRED INTO POS AND HOLD RWY 17 AT HOUSTON HOBBY. AS WE TOOK THE RWY WE CHKED FINAL FOR 17 AND SAW A MLG ON FINAL TO RWY 12R. THERE WAS A SMALL TWIN DEPARTING MIDFIELD FROM 17 AS WE STOPPED IN POS. A SMT Y OVERFLEW OUR ACFT BY 30-40 FT AND LANDED ON RWY 17. WE HEARD NO CLRNC ISSUED TO ANYONE TO LAND ON 17 PRIOR TO TAKING RWY. TWR PERSONNEL INVESTIGATING INCIDENT. SUPPLEMENTAL INFO FROM ACN 191128. WHILE WORKING LCL AT HOU WHICH HAS 4 XING RWYS I PUT A SMA IN POS AT RWY 17 AT FOXTROT INTXN. I HAD SMT Y ON SHORT FINAL FOR ANOTHER RWY AND I SAW AN OPPORTUNITY TO REDUCE HIS TAXI DISTANCE SO I CHANGED HIS RWY TO RWY 17 AND CLRED HIM TO LAND. SMT Y LANDED AND TURNED OFF AT FOXTROT AND TAXIED TO PARKING THIS IS WHEN HE NOTIFIED ME THAT THERE WAS TFC ON THE RWY. AT THE TIME I WAS VERY BUSY AND MY ATTN WAS MOSTLY ON EVENTS ELSEWHERE AROUND ARPT. HAD I NOT CHANGED SMT Y LNDG RWY ON SHORT FINAL I WOULD HAVE HAD MORE TIME TO SCAN MY RWY.