As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L1 DOOR LOCK WILL NOT DISENGAGE. RELEASED FOR SERVICE PER MEL : 52-11-01-A. FOUND GUSTLOCK STUCK AND WHEN PULLING HARD ENOUGH HEARD POP SOUND AND DOOR WILL NOW OPEN AND SHUT BUT GUST LOCK DOES NOT WORK. REPLACED THE BROKEN HOLD OPEN LOCK COLLAR. WITH REF TO AMM 52-11-08-8. OPS CHECK GOOD.