Robinson R44 Cadet — Service Bulletins

This service bulletin (SB-114) addresses an upgrade for the D270-1 governor controller used in various models of the Robinson R44 series, including the R44 Cadet. It is directed towards owners, operators, and maintenance personnel of the R44 series helicopters. The bulletin highlights the potential for moisture incursion to cause malfunctions in the governor controller and mandates the exchange of affected controllers for upgraded versions that provide better moisture protection. Compliance with this bulletin is required by February 29, 2024, to ensure the safe operation of the helicopters involved.

• Affected controllers include D270-1 Revision A thru E installed on specific R44 models.
• Compliance deadline is February 29, 2024.
• Moisture can cause governor controller malfunctions; upgrade to Revision F or later is required.
• Cost for parts is approximately $1800, refundable upon return of the affected controller.
• Labor required for the upgrade is estimated at 2 hours.