What was found
IN FLIGHT PAX REPORTED #1 ENGINE LATCH ON TOP OF PYLON WAS POSSIBLY LOOSE. CREW COULD NOT VERIFY STATUS. GROUNDED - YES. DIVERSION - PERFORMED LATCH CLOSING FORCE FOUND TO BE LESS THEN REQUIRED (12LB). REF B737-800 AMM TASK 54-52-01-410-801. REMOVED FWD ENG #1 FAIRING REF B737-800 AMM 54-52-01. REPLACED LATCH ON PANEL 431 AT REF B737-800 SRM 51-40-02. INSTALLED FWD ENG #1 FAIRING REF AMM 54-52-01. # 1 ENG FWD STRUT FAIRING EXT INSPECTION. FOUND NO ABNORMALITY. LATCH VERIFIED SECURED. REF AMM TASK 05-41-04-210-811.