We are still working to convert all of our CANs from PDFs into text on our website.
Feel free to browse the converted content below, or download the full PDF [PDF 16 KB]

Published: 16 December 2016
Effective: 16 December 2016

ATA Chapter: 64

Subject:

To advise aircraft operators and maintainers that the CAA has received a number of reports of finding cracked TRBs with P/N C029-1 and C029-2 on Robinson R44 series helicopters. RHC SB-83 requires the introduction of a Special Pilot Caution into the AFM u

Applicability:

Robinson R44 series helicopters fitted with Tail Rotor Blades (TRBs) with P/N C029-1 or C029-2

Applicability:

Robinson R44 series helicopters fitted with Tail Rotor Blades (TRBs) P/N C029-1 or C029-2.

Purpose:

To advise aircraft operators and maintainers that the CAA has received a number of reports of finding cracked TRBs with P/N C029-1 and C029-2 installed on Robinson R44 series helicopters.

Background:

The CAA and Robinson Helicopter Corporation (RHC) have received reports of finding fatigue cracks in the leading edge of TRBs with P/N C029-1 and C029-2. The cracks are caused by high fatigue stresses during manoeuvres with large left pedal inputs. TRB P/N C029-3 incorporates design features to reduce fatigue stresses. RHC SB-83 requires the introduction of a Special Pilot Caution into the AFM until TRBs with P/N C029-3 are installed. (P/N C029-3 TRBs require a G062-1 hub assembly.)

Recommendations:

The CAA recommends that operators and maintainers accomplish the following: