As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER T/O LG LEVER DISAGREE. HANDLE SELECTED UP GEAR REMAINED DOWN FACT 01MAY25 15:59 SBY UPON INSPECTION OF #100 HYDRULIC ACCUMILATOR, FOUND T-FITTING CHECK VALVE BACKWARDS. REMOVED AND REPLACED O-RINGS AND INSTALLED CHECK VALVE IN THE CORRECT ORIENTATION IAW AMM 20-10-03. PERFORMED GEAR SWINGS IAW AMM 32-30-00. OPS AND LEAK CHECK GOOD