As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNRELIABLE AIRSPEED AT FL260.EICAS IAS UNRELIABLE WITH L MACH .79 RMACH IAS L/R 327/347. EMERGENCY DECLARED. REMOVED AND REPLACED THE ADM IAW AMM 34-26-03-004-008 AND -008. PERFORMED A CAPTAIN`S AND FIRST OFFICERS PITOT PRESSURE SYSTEM LEAK TEST IAW AMM 34-11-00-795-180. LEAK TESTED GOOD.