LTT LANDED WITH RIGHT MAIN GEAR UNSAFE INDICATION. RIGHT MAIN GEAR COLLAPSED WHILE TAXIING TO THE RAMP.

Narrative

ON MAY 1988 I WAS CAPT OF AN SMT COMMUTER FLT ENRTE FROM PROVIDENCE; RI; TO NEWARK; NJ. PRIOR TO LNDG; THE PRIMARY ELECTRIC-HYDRAULIC SYS FAILED TO PROPERLY EXTEND THE RIGHT MAIN LNDG GEAR; AND IT COULD NOT BE RESET TO RECYCLE THE GEAR. WE EVENTUALLY LANDED SAFELY UTILIZING THE MANUAL; BACKUP SYS. ABOUT 3 MINUTES LATER WHILE THE ACFT WAS BEING TAXIED TO PARKING; THE RIGHT MAIN LNDG GEAR COLLAPSED. NONE OF THE 19 PAXS (OR CREW OF 2) WERE INJURED; BUT THE RIGHT PROPELLER AND LNDG GEAR ACTIVATOR HAD TO BE REPLACED BEFORE THE ACFT COULD BE FLOWN BACK TO BASE FOR INSPECTION AND REPAIR. FAA INVESTIGATORS ON THE SCENE THAT DAY COULD NOT SAY IF THEY WOULD EVENTUALLY CLASSIFY THIS AS AN INCIDENT OR AN ACCIDENT. I'M ENCLOSING COPIES OF 2 STATEMENTS WHICH I BELIEVE WILL MEET YOUR REQUIREMENTS FOR A NARRATIVE DESCRIPTION. THE SUSPECT ACTUATOR HAS (AGAIN) BEEN RETURNED TO THE MANUFACTURER FOR INSPECTION. IT IS MY HOPE A FULL EXAMINATION/UNDERSTANDING OF THIS INCIDENT WILL RESULT IN DESIGN OR PROC CHANGES THAT MIGHT HELP PREVENT ANOTHER INCIDENT OF THIS TYPE. PLEASE CONTACT ME IF NASA HAS ANY QUESTIONS ABOUT THIS; OR IF YOU WISH ME TO FORWARD NEW INFO AS MAY BECOME AVAILABLE.