ERCOUPE 415C PLT LANDS OVER ACFT ON RWY 23 AT SHD AND HAS A RWY INCURSION.

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I HAD NOT FLOWN FIXED WING FOR 4 YRS. SINCE I NEEDED A BFR AND TIME-IN-TYPE (WILL FLY SPORT PLT) I WAS WITH A CFI. ON OUR THIRD LNDG; A BEECH BARON BLEW A TIRE AND WAS PULLED OVER TO EDGE OF RWY; APPROX 1/4 WAY DOWN 6000 FT RWY 23. BARON CALLED BLOWN TIRE. INTERCOM IN ERCOUPE NOT WORKING PROPERLY. I RELAYED MESSAGE TO CFI. HE ASSESSED SITUATION AND TOLD ME TO LAND LONG SINCE WE HAD AT LEAST 4000 FT OF RWY AND WE WERE LOW ON GAS. I ANNOUNCED SAME; ON DOWNWIND; BASE; FINAL. AS I CLRED BARON; SHD TFC SAID 'YOU'RE TOO LOW.' I REPLIED 'ROGER;' BUT IT WAS EVIDENT TO US WE WERE GOING TO CLR BARON BY AT LEAST 100 FT. APPLIED PWR; CLRED BARON BY AT LEAST 150 FT. AS I WAS IN FLARE; SHD TFC CALLED AND SAID 'YOU CANNOT LAND!' AT THAT POINT; I WAS FLARING AND WITHIN 20 FT OFF RWY. I COMPLETED LNDG; AND TAXIED BACK TO RAMP. WHEN WE TALKED TO SHD TFC; SHE SAID SHE DID NOT HEAR MY CALLED INTENTIONS. AT THAT POINT SHE WAS WORKING 2 RADIOS WITH GND CREW. ALTHOUGH WE CLRED BARON AND LANDED WITH RWY TO SPARE; I SHOULD HAVE REMEMBERED THAT A DISABLED PLANE ON RWY EFFECTIVELY CLOSES THAT RWY.