As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R2L KNUCKLE BUSTER DOES NOT POP OUT WHEN DOOR IS CLOSED. FOUND PLACARD ON TOP OF KNUCKLE BUSTER PEELING UP, WHICH MADE CONTACT WITH DOOR LINING PREVENTING IT FROM EXTENDING. REPLACED PLACARD PER AMM 11-30. (8331154) AIRCRAFT WAS GROUNDED