As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TRAINING FLIGHT IN PREP FOR COMMERCIAL/AMEL, PILOT PERFORMED INTENTIONAL SHUTDOWN OF LT ENGINE (FEATHERED). WAS UNABLE TO RESTART WITH ACCUMULATOR AND BEGAN PROCEDURE TO RESTART WITHOUT ACCUMULATOR WHICH WAS UNSUCCESSFUL. PILOT RETURNED TO DEPARTURE AND LANDED. AN INVESTIGATION OF THE ACCUMULATOR REVEALED A RUPTURED DIAPHRAGM. REPLACED LT ACCUMULATOR AND RT ACCUMULATOR WAS REPLACED AS A PRECAUTIONARY METHOD. (K)