DURING A MULTI-ENG TRAINING FLT IN A PIPER PA44 SEMINOLE; THE LNDG GEAR WOULD NOT EXTEND NORMALLY. THE APPLICATION OF THE EMER EXTENSION FAILED TO LOCK DOWN THE R MAIN GEAR. THEREFORE; THE R MAIN GEAR COLLAPSED DURING LNDG; CAUSING THE ACFT TO GO OFF THE R SIDE OF THE RWY INTO THE GRASS.

Narrative

EARLY EVENING SEP/XA/98; I WAS CONDUCTING A TRAINING FLT WITH A COMMERCIALLY RATED STUDENT IN A PIPER SEMINOLE. WE DEPARTED FROM CRAIG ARPT AT APPROX XA00 FOR OUR VFR FLT. AFTER A PERIOD OF PRACTICE MANEUVERS AND PRACTICE AIRWORK; WE APCHED FLAGLER COUNTY ARPT FOR A VFR PATTERN TO LNDG. ON DOWNWIND IN THE PATTERN; WE ATTEMPTED TO PUT THE GEAR DOWN AND GOT NO INDICATION OF GEAR DOWN OR LOCKED; NOR DID WE SEE THE NOSE GEAR IN THE ENG NACELLE MIRROR. AT THIS POINT; WE ABORTED THE PATTERN FROM THE DOWNWIND AND CLBED UP TO ALT TO TROUBLESHOOT AND PERFORM CHKLISTS AND CONSULT THE PA44-180 ACFT FLT MANUAL. AFTER ATTEMPTING TO TROUBLESHOOT THE PROB WITH ALL APPLICABLE CHKLISTS AND THE AFM (CHKING LIGHT BULBS; SWITCHES; RESETTING CIRCUIT BREAKERS; RECYCLING THE GEAR; ETC); WE FOLLOWED OUR EMER PROC FOR THE MANUAL EXTENSION OF THE GEAR. AFTER THE EMER MANUAL EXTENSION OF THE GEAR; WE RECEIVED AN INDICATION OF DOWN AND LOCKED ON THE L MAIN GEAR; AND WE COULD SEE THE NOSE GEAR (WHICH APPEARED TO BE IN THE CORRECT RELATIVE POS) IN THE ENG NACELLE MIRROR. HOWEVER; WE HAD NO INDICATION OF GREEN DOWN AND LOCKED ON THE NOSE GEAR OR ON THE R MAIN. ONCE AGAIN; WE RECHKED OUR CHKLISTS AND THE AFM AND TRIED ONCE AGAIN TO TROUBLESHOOT BY CHKING LIGHT BULBS AND ALSO BY ATTEMPTING TO YAW THE ACFT AND PUT SOME G'S TO HELP THE GEAR LOCK INTO PLACE. WE WERE UNSUCCESSFUL AT GETTING A GREEN INDICATION FOR THE NOSE OR THE R MAIN. THE ACFT WAS FLYING NORMALLY; WITH NO APPARENT ADVERSE YAW. AT APPROX 30 MI S OF CRAIG ARPT; WE CONTACTED CRAIG TWR AND ADVISED THEM OF OUR SIT WITH THE GEAR. WE REQUESTED A FLY-BY TO SEE IF THEY COULD GET ANY VISUAL INDICATION ON THE GEAR. WE ALSO REQUESTED THAT THE TWR TRY TO PHONE SOMEONE AT OUR COMPANY TO ALSO ADVISE THEM OF THE SIT. WHEN WE FINALLY ARRIVED AT THE ARPT WE MADE 3 PASSES BY THE TWR FROM 3 DIFFERENT PERSPECTIVES AND THE TWR ADVISED US THAT IT APPEARED THAT THE GEAR WAS INDEED DOWN. AFTER FURTHER REVIEW OF ALL EMER PROCS; CHKLISTS AND THE AFM; WE ADVISED THE TWR OF OUR DECISION TO LAND. THE TWR THEN COORDINATED ALL THE EMER EQUIP AND FIRE TRUCKS; AND WE OFFICIALLY DECLARED OUR EMER. WE WERE CLRED FOR A STRAIGHT-IN FOR RWY 14. WE FOLLOWED ALL MANUFACTURER RECOMMENDED PROCS FOR OUR LNDG; AND ON TOUCHDOWN; THE L MAIN AND THE NOSE GEAR REMAINED EXTENDED AND LOCKED. OUR R MAIN GEAR COLLAPSED. ON ROLLOUT; THE ACFT YAWED TO THE R AND WE CAME TO A STOP OFF THE R SIDE OF THE RWY IN THE GRASS. NO ONE WAS INJURED.