What was found
B18753 AFT ALL LDG RETRACTED & DOORS CLOSED, FWD INST PNL GEAR & DOOR OPEN RED LITE KEPT ILLUM WITH GEAR LEVER IN UP OR OFF POS. ALL DOORS WERE CONFIRMED CLOSED.C/A:1.BOTH PRI & ALT LDG LOG CONT MODULES, NLG LOCK SNSR S397, & PROX SNSR S396 WERE RPLC, THUS FIXED THE GEAR SQK, BUT DOOR OPEN XFR TO D/D, AND THE WIRING BETWEEN SNSR & LOGIC CONT MODULES IS CONFIRMED NORMAL. 2.THE D/D WAS CLEARED AFT THE CONT MODULE RPLC. SINCE THE F/E INDICATION WAS ALWAYS NORMAL. HENCE, THE MODULE IS DETERMINED AS THE ROOT CAUSE OF THE SQK. 3.THE ROMAIC & MHS DATA SHOW THAT THE CONT MODULE HAS HIGH TSO AROUND 27000 FH MINIMUM, AND LOW REMOVAL REATE OF 9 UNITS REMOVED DURING 11 YEARS, ADDITIONALLY, NO OTHER SQK OF THIS KIND IS RE