As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RDU - FLT 2 - LOST SYSTEM 1 HYD EN ROUTE DCA/RDU, CAPTAIN DEACTIVATED SYSTEM 1 HYD DECLARED EMERGENCY. LANDED AIRCRAFT SAFELY. RDU MAINTENANCE FOUND O-RING ON ENGINE NR 2 SYSTEM NR 1 HYD PUMP BAD. REMOVED AND REPLACED PRESSURE LINE O-RING AND BACK UP O-RING ON NR 1 HYD PUMP. GROUND RAN A/C. NO LEAKS DETECTED. ALL WORK DONE IAW AMM 29-11-00. (M)