As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR STAIR DOOR WILL NOT CLOSE PROPERLY DUE TO THE BOTTOM STEP NOT COMPLETLEY FOLDING TO ALLOW THE DOOR TO ENTER THE JAMB. GAINED ACCESS TO A/C AND APPLIED APU POWER. PERFORMED MULTIPLE SATISFACTORY OPERATIONAL CHECKS AND GVI OF THE MAIN PASSENGER DOOR WITH NO DEFECTS. ALL WORK PERFORMED IN REF WITH GL-6000 AMM 52-11-00