As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DOOR 1L SHUTTERS AND BINDS WHEN LOWERING L1 MAIN ENTRY INOP. WHEN LOWERING DOOR AFT DRIVE CHAIN APPEARS TO SKIP ON SPROCKET. ORDERED CHAIN AND SPROCKET NIS AT DFW. REFERENCE IPC 52-11-50 FIG. 1. ITEMS 380 AND 360 (SPACERS) APPEAR TO BE MISSING CAUSING SHAFT AND SPROCKET TO MOVE SIDE TO SIDE RESULTING IN BINDING AND SHUTTERING WHEN CLOSING. BEARING IS MISSING/DETERIORATED AND MAY REQUIRE SUPPORT BRACKET