What was found
TNK 3 TIP TRAPPED ALERT DURING CRUISE. 5800 LBS TRAPPED IN #3 TANK. EMERGENCY DECLARED WITH ATC. IN REF TO FFC ERO 5200247 REMOVED REPLACED AND OPS CHECKED #3 MOTIVE SHUTOFF VALVE IRW FE MD10- 30 AMM 28-21-13-2 AND FE MD10-30 FIM 28-14-00-810-803. OPS CHECKS GOOD. MOTIVE VALVE PART NUMBER 19730-3 SN 0125. MOTIVE VALVE INSTALLED PN 19730-3 SN 4135. NOT TORQUE WRENCH REQUIRED FOR INSTALL. NO SIGNIFICANT TANK ENTRY REQUIRED. CONFIRMED MOTIVE SHUTOFF VALVE FAILED BY FFC CREW PRIOR TO INSTALL.