Prompted By A 2015 Fatal Accident Involving An A36 Bonanza
A Special Airworthiness Information Bulletin (SAIB) has been released for a concern with alternator drive couplings on Continental Motors, Inc. (CMI) IO-520, GTSIO-520, TSIO520, IO-550, IOF-550, TSIO-550, TSIOF-550, and TSIOL-550 model engines (operating with AVGAS) with direct drive alternator systems. The SAIB draws attention to the possible failure of the alternator drive coupling following maintenance events and/or improper installation. This failure could result in loss of engine power in flight and forced landing.
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