As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF RUDDER RATIO LIGHT ILLUMINATED ABOVE 210 KNOTS, EXTINGUISHED BELOW 210 KNOTS RETURNED TO FIELD, A SAFE LANDING WAS MADE. FOUND PITOT LEAK IN LOWER RIGHT AUX PITOT SYSTEM CAUSED BY FAILED DIAPHRAGM IN RIGHT STABILIZER MODULE CONTROL PACKAGE, REPLACED STABILIZER MODULE CONTROL PACKAGE PER 27-41-04 PG 201. ACCOMPLISHED RVSM PER TWN B747 34-005A. OPS CHECK AND LEAK CHECK NORMAL IAW AMM 34-11-00 PG 501. AIRCRAFT RELEASED FOR SERVICE.