As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A EMERGENCY DECLARED - SHORTLY AFTER TAKE OFF, HYD YELLOW SYS LO PRESS, FOLLOWED BY YELLOW RSVR LO LEVEL.DURING TROUBLE SHOOTING FOUND YELLOW HYD LINE CHAFED AND LEAKING BY RT MLG AFT MOUNT. REMOVED AND REPLACED 4 HYD LINES DUE TO POSSIBLE FURTHER CHAFING IN REFERENCE TO AMM 20-23-11. LEAK CHECK GOOD AT THIS TIME. REFERENCE ML 207320-1 FOR POSSIBLE STARVATION/CAVITATION OF ENG PUMP.