As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: UPON RETURN TO GATE, FIRST OFFICERS PERSONAL FLOTATION DEVICE IMPLODED WITH A LOUD "BANG" AND SMOKE FILLED COCKPIT. ACCOMPLISHED ODOR FUMES INITIAL TROUBLE SHOOTING CARD 26L00021001. FOUND FIRST OFFICERS PERSONAL FLOTATION DEVICE TO BE THE ODOR FUMES SOURCE , DID NOT FIND ANY OTHER FUMES SOURCE AIRCRAFT OK FOR SERVICE