What was found
PILOT REPORTED 'CABIN' CAP LIGHT ILLUMINATED DUIRNG FLIGHT AT 11,300 FEET. PERFORMED EMERGENCY CHECKLIST ACTIONS, DESCENDED TO 9,000 FEET. CABIN CAP LIGHT OUT CABIN DOES NOT PRESSURIZE. MAINTENANCE DEFERRED PER MEL 21-14. LATER TROUBLE-SHOOTING DETERMINED NLG WEIGHT ON WHEEL SWITCH CLOSED DUE OT LOW NITROGEN PRESSURE IN STRUT. AFTER SERVICING, A FUNCTIONAL CHECK FLIGHT WAS PERFORMED WITH NO DISCREPANCIES NOTED. (M)