This Special Airworthiness Information Bulletin advises you of an airworthiness concern regarding potential unannunciated failures of the MK XXII Enhanced Ground Proximity Warning System (EPGWS) aural alerting function. At this time, the airworthiness concern is not an unsafe condition that would warrant airworthiness directive (AD) action under Title 14 of the Code of Federal Aviation Regulations (14 CFR) part 39.
SW-10-41 – Rotorcraft/ All/ All Models

