What was found
FLT#569, BOS-FLL. 'AFT AVIONICS COMPARTMENT SMOKE INDICATION ON SHORT FINAL. SMOKE INDICATION WENT OUT AFTER LANDING.( AVIONIC SMOKE DETECTION SYSTEM AFT AVIONICS CARGO RACK (LTV) ); PERFORMED IFE AFT RACK CLEANING IAW AM 44-20-160-801 OPS CHECK OK ,IAW AMM 44-20-20-750-801 ,MDDR CLEARED MX-4 UPDATED .8TH732B.'