As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) A HOSE ASSY (390A20D4.8) FROM A FUEL SUPPLY MANIFOLD WAS REMOVED AND ROUTED TO OUR INTERNAL OVERHAUL SHOP FOR REPLACEMENT OF THE HOSES. UPON DISASSEMBLY, IT WAS DISCOVERED THAT ONE FITTING (AN212-20D) WAS CORRODED AND CRACKED LONGITUDINALLY ON ONE SIDE WHERE THE FIRE SLEEVE COVERS THE FITTING. IT WOULD APPEAR THAT THE FIRE SLEEVE TRAPPED MOISTURE AND THUS CORRODED THE FITTING.