What was found
L-2 DOOR PASSING THROUGH FL200 AND FL190 DISARMED AND STAYED DISARMED UNTIL LANDING AND DEPLANING. ITEM PLACED ON MEL C#L05701 CAT C CONDITION NR 2 REFERENCE MEL 25-60-04 MX-4 UPDATED. MCC NOTIFIED. PLACARD INSTALLED. MEL CLEARED WITH TSM CORRECTIVE ACTIONS. PERFORMED TSM TASK NR 52-73-00-810-801 AND TSM TASK 52-13-00-810-806, FOUND CAB PRESS WARNING PANEL 17WN1 ON L-2 DOOR SHORTED INTERNALLY AT PINS A AND B REF ASM 52-73-02, ALSO FOUND L-2 SLIDE ARM PROX SWITCH 7WN1 INTERNALLY DAMAGED DUE TO FAILURE OF 17WN1 TEF ASM 52-73-01. WIRING VERIFIED OK BETWEEN MODULES 7WN1, 3WN1 AND 17WN1 IAW 52-73-01. REMOVED AND REPLACED 17WN1 IAW 52-73-22-401, OPS CHECK OK. R/R 7WN1 IAW AMM 52-73-11-401. OPS CHECK OK.