What was found
HYDRAULIC B SYSTEM FAILURE IN FLIGHT.LANDED FLAPS 15 AT 160,000 FT.INSPECTED A/C FOUND RT SPOILER RETURN LINE CRACKED INSTALLED INTERM REPAIR FLEX LINE PER MP&P.CH 1-15-5. INST. PERMANANT B SYS RETURN LINE FOR RT SPOILER IAW B72MM 29-10-00 OPS NORMAL REMOVED TLD MXC ADVISED. REMOVED AND REPLACED NR 1 "B" ELECT PUMP. OPS LEAK CHECKED GOOD MM 29-12-11. REMOVED AND REPLACED NR 2 "B" ELECT PUMP - OPS LEAK CHECKED GOOD MM29-12-11. REMOVED AND REPLACED "B" SYSTEM CASE DRAIN FILTERS. OPS LEAK CHECKED GOOD MM 29-12-21