As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. AFTER ALTERNATE GEAR EXTENSION, B SYSTEM WOULD NOT RETRACT GEAR USING LGTU WITH NR 1 ENGINE SHUTDOWN AND A HYDRAULIC OFF AT FL350. REPEATED AT 15,000 AND B SYSTEM WOULD NOT RETRACT SECOND ATTEMPT. MANUAL EXTENSION ALSO HAD SIGNIFICANT RESISTANCE ON CABLES AT FL 350. REMOVED AND REPLACED LANDING GEAR TRANSFER VALV, IAW AMM 32-31-71.