As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYD YELLOW RSVR LO LEVEL M/C AT 90 KTS ON TAKEOFF KMHT. RETURNED TO RAMP. OVR YELLOW QTY READ "ZERO". RT ECAM HYD PAGE READ FULL QTY. NO PRESSURE NOTED YELLOW SYS. FOUND BLUE/YELLOW PRIORITY VALVE IN STAB COMPT BROKEN APART. REMOVED AND REPLACED VALVE, SERVICED AND BLED SYSTEM, AND PERFORMED 1 AND 2 ENGINE RUN. STAB SYSTEM CHKD NORMAL AND NO LEAKS NOTED. MM REF: 27-44-16-4, 29-11-32-4-01; 12-12-29-0. ENGINE RUN IAW A300 JRH CHAP 5A. PREMATURE REMOVAL/INSTALLATION OFF MFG 45990-1.