What was found
FLT#1408, CDG-JFK. (ETOPS) ' APU AUTO SHUT DOWN AT GATE ABOUT 3 MIN AFTER WE GOT THE APU CLASS II MSG; PER PFR, "LOW FUEL PRESSURE" MSG, REMOVED AND REPLACED FCU REF AMM 49-32-11. OPS CHECKS AND LEAK CHECKS OK. NO FAULT PRESENT, REF LP # 4079503, ITEM 1 (PERFORMED ETOPS SIG SYSTEM GROUND VERIFICATION AFTER APU FCU REPLACEMENT GROUND VERIFICATION OK REF AMM 49-32-11) FOR ETOPS SIG SYSTEM GROUND VERIFICATION.'