As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
Y RSVR LO LVL DISPLAYED ON UPPER ECAM SCREEN. - HYD UPDATED MAA CODE FIX USING VENDOR MAA SCREEN PLEASE CONTACT TOMC BEFORE COMMENCING ANY WORK. FOUND #2 ENGINE LOW PRESSURE HYD SWITCH LEAKING AT O RING CORRECTION AMM FOR THE YELLOW LOW PRESSURE SWITCH USED, AMM 29-13-17-400-010-A. REMOVED AND REPLACED ENGINE 2 HYDRAULIC PUMP LOW PRESSURE SWITCH AND O RING REF AMM 29-11-17-400-010-A. OPERATIONAL TEST GOOD AT THIS TIME. NO LEAKS NOTED. RAN ENGINE #2 AND VERIFIED THAT THERE WAS NO ADDITIONAL LEAKS FOUND.