As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR DID NOT RETRACT EITHER SYS 1 OR 2 ON FIRST TRY LOUD BANG WITH GEAR DOORS UNLOCKED INDICATION CYCLED DOWN AND UP AGAIN SYS 1 STILL UNSAFE NO LOUD BANG. DOOR INDICATE UNLOCKED MAIN GEAR DOWN GREEN CYCLED DOWN ALL INDICATED 1 GREEN APPEARED MAIN GEAR NEVER MOVED. AT FIRST CHECK FOUND ON LT MAIN GEAR PITCH DAMPER POPPED. R & R SELECTOR VALVE IAW MM 32-31-12-4.