A CESSNA PVT PLT LANDS GEAR UP ON RWY AT ZZZ; US.

Narrative

THIS WAS A GEAR-UP LNDG RESULTING FROM SEVERAL DISTRS ALLOWED TO INTERFERE WITH 3 HABITUAL POINTS IN THE TFC PATTERN WHERE I NORMALLY PERFORM LNDG CHKLISTS. MY ACFT WAS DOWN FOR MAINT FOR JUNE AND JULY; 2003. I NEXT FLEW AT THE END OF JULY TO PICK UP THE ACFT FROM MAINT. THE REBUILT TURBO-CHARGER FAILED AT THE END OF AUGUST. THE TURBO-CHARGER AND OTHER REPAIRS WERE COMPLETED ON OCT/FRI/03; AND THE ACFT WAS TEST FLOWN WHILE CLOSELY MONITORING ENG INSTS FOR 3 CIRCUITS OF FULL STOP LNDGS IN THE PATTERN AT THE ACFT'S HOME ARPT. ON THE THIRD CIRCUIT; ABEAM THE LNDG ZONE ON DOWNWIND; WHILE BEGINNING THE FIRST HABITUAL PRE-LNDG CHK; TWR INSTRUCTED ME TO POINT OUT A MUCH SLOWER AIRPLANE (SCOUT) ENTERING BASE ABOUT 1/2-3/4 OF A MI IN FRONT OF ME. THIS DID NOT PRESENT A DANGER TO MY ACFT. MY FIRST PRE-LNDG CHK WAS NOT COMPLETED BECAUSE OF THE DISTR FROM MONITORING ENG INSTS AND LOOKING FOR THIS ACFT; WHICH WAS ENTERING FROM MUCH HIGHER THAN THE TFC PATTERN. DOWNWIND WAS EXTENDED AND MY ACFT WAS SLOWED TO JUST OVER 10 KTS ABOVE STALL FOR SPACING. I TURNED BASE; EXTENDED SECOND NOTCH OF FLAPS AND KEPT LOOKOUT FOR THE SCOUT UP TO ITS TURNING FINAL. AS I APCHED FINAL; I LOST SIGHT OF THE SCOUT; TURNED FINAL; EXTENDED FINAL FLAPS; MONITORED ENGS INSTS AND WAS DISTR FROM MY SECOND PRE-LNDG CHK LOOKING FOR THE SLOWER SCOUT. AT THREE QUARTER MI FINAL; I RE-ACQUIRED VISUAL OF THE SCOUT; WHICH WAS JUST PAST FLARING. AFTER SEEING IT CLR RWY; TWR ATC FAILED TO CLR ME TO LAND SO I XMITTED REQUEST FOR CLRNC TO LAND; WHICH WAS GIVEN JUST AS I CROSSED THE ARPT BOUNDARY WHERE I NORMALLY LOOK OUT THE PLT'S WINDOW FOR FINAL CHK TO CONFIRM THE GEAR IS DOWN. THE TIMING OF THIS EXCHANGE DISTRACTED ME FROM THE THIRD AND FINAL CHK USED AS A HABIT TO AVOID A GEAR-UP LNDG. BECAUSE PWR WAS CARRIED INTO THE FLARE IN ORDER TO FLY A SOFT FIELD APCH AND LNDG; BY DESIGN THE GEAR WARNING HORN DID NOT GO OFF UNTIL PWR WAS REDUCED AT THE EXPECTED POINT OF TOUCHDOWN. THE GEAR HORN WENT OFF AS THE PROP STRUCK THE RWY; AFTER WHICH THE ACFT SETTLED ONTO THE RWY AND SLID ON ITS BELLY. BECAUSE I ALLOWED MYSELF TO BECOME DISTR THROUGHOUT THE END OF DOWNWIND; BASE AND FINAL SEGMENTS OF THE PATTERN; I NEVER REALIZED I OVERLOOKED THE PRE-LNDG CHK AT 3 DIFFERENT POINTS. MY PAST DECISIONS TO RELY UPON HABIT IN MULTIPLE PLACES TO PERFORM THE PRE-LNDG CHK FOR GEAR DOWN AND OTHER ITEMS DID NOT SAVE ME FROM THE USUAL STUPID RESULT FROM ALLOWING MULTIPLE DISTRS TO INTERRUPT THE CHKS. I BELIEVE THIS CHAIN OF EVENTS COULD HAVE BEEN AVOIDED HAD I TAKEN THE EFFORT ON THE GND TO MENTALLY REVIEW AND POSITIVELY IDENT ALL REQUIRED ACTIONS FOR ALL SEGMENTS OF THE PATTERN INSTEAD OF RELYING UPON LONG ESTABLISHED HABITUAL PATTERNS USED TO TRIGGER COMPLETION OF PRE-LNDG CHKS AT SPECIFIC POINTS (IN THE TFC PATTERN; APCHING THE TFC PATTERN AND APCHING THE FINAL APCH FIX FOR INST APCHS). I ALSO BELIEVE; I HAVE PLACED TOO MUCH EMPHASIS UPON PREFLT MENTAL REVIEW OF INST PROCS AND BECAME COMPLACENT ABOUT PREFLT REVIEW OF 'MUCH SIMPLER' VFR FLT; ESPECIALLY IN THE PATTERN AT MY HOME ARPT. IN THE FUTURE; I INTEND TO MENTALLY BRIEF AND REHEARSE ROUTINE AS WELL AS EMER PROCS PRIOR TO ALL FLTS; BOTH VFR AND IFR.