Narrative:

Far 91 flight. Private pilot in left seat, I (ATP, cfii) right seat. ILS landing on IFR flight plan. Charter training flight. Had private pilots wife's brother/wife/daughter. ILS approach. Checklist was read and performed. Flaps/gear/3 green over FAF called tower/received clear to land. Flaps to full (30 degrees), autoplt to dead heading. Autoplt off and normal flare. Both throttles idle, no horn. Heard stall horn just at T/D. Smooth T/D at 75 KTS on centerline. No crosswind, heard grinding noise, propellers bending. Stopped within 300 yds, within 1 1/2' of centerline. I opened my door/heard rear door open and passenger departing aircraft. I turned off magnetic/bat/altitude/fuel (on floor) switches. Abandoned aircraft with pilot. Minimum smoke. No fire. Confirmed gear switch was still in down position. I landed with gear up (tower said they called me 3 times for me to check my gear; neither of us heard the tower).

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Original NASA ASRS Text

Title: INSTRUCTOR AND PVT PLT FLYING. LANDED SMT TWIN ENGINE GEAR UP. ALLEGEDLY NO WARNING HORN.

Narrative: FAR 91 FLT. PVT PLT IN LEFT SEAT, I (ATP, CFII) RIGHT SEAT. ILS LNDG ON IFR FLT PLAN. CHARTER TRNING FLT. HAD PVT PLTS WIFE'S BROTHER/WIFE/DAUGHTER. ILS APCH. CHKLIST WAS READ AND PERFORMED. FLAPS/GEAR/3 GREEN OVER FAF CALLED TWR/RECEIVED CLR TO LAND. FLAPS TO FULL (30 DEGS), AUTOPLT TO DEAD HEADING. AUTOPLT OFF AND NORMAL FLARE. BOTH THROTTLES IDLE, NO HORN. HEARD STALL HORN JUST AT T/D. SMOOTH T/D AT 75 KTS ON CENTERLINE. NO XWIND, HEARD GRINDING NOISE, PROPS BENDING. STOPPED WITHIN 300 YDS, WITHIN 1 1/2' OF CENTERLINE. I OPENED MY DOOR/HEARD REAR DOOR OPEN AND PAX DEPARTING ACFT. I TURNED OFF MAG/BAT/ALT/FUEL (ON FLOOR) SWITCHES. ABANDONED ACFT WITH PLT. MINIMUM SMOKE. NO FIRE. CONFIRMED GEAR SWITCH WAS STILL IN DOWN POS. I LANDED WITH GEAR UP (TWR SAID THEY CALLED ME 3 TIMES FOR ME TO CHK MY GEAR; NEITHER OF US HEARD THE TWR).

Data retrieved from NASA's ASRS site as of August 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.