As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF, NR 4 ENG WOULD NOT MAKE PWR. ONCE AIRBORNE HAD TO PUSH THROTTLE PAST OTHER THROTTLES NR 4 EGT WENT TO 907 DEGREE. THE CREW RETURNED TO DEPARTURE WITHOUT FURTHER INCIDENT. MX INSPECTED NR 4 ENG AND FOUND VSV'S AND VBV OUT OF RIG. MX ACCOMPLISHED VSV'S AND VBV'S RIGGING. OPS CHECK GOOD IAW MM 75-32-00, 73-21-00, AND ATI ERH 70.01.1. ACFT WAS RETURNED TO SERVICE.