As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE PREFLIGHT CREW FOUND R1 SLIDE PUSH BUTTON WILL NOT TEST. TRANSFER TO MEL 25-61-2, DMP 25-61-2, ACCOMPLISHED PRIOR TO DEPARTURE PRESSURE OK NORMAL PLACARD INSTALLED SECURED INDICATORS JACK/PLUG CONNECTOR AND OPS CHECKED NORMAL IAW AMM 25-61-04-501. PLACARD REMOVED.