EASA AD US-2020-08-10: Tail Rotor - Blades - Inspection

What to do

Operators of Robinson R44 and R44 II helicopters with tail rotor blades P/N C029-1 or C029-2 must visually inspect each tail rotor blade for cracks within 50 hours time-in-service after May 22, 2020, and before every subsequent flight. If any crack is detected, the affected tail rotor blade must be replaced before further flight. Inspection results must be recorded in the aircraft maintenance records as required by 14 CFR 43.9(a)(1).

Summary

The Federal Register Volume 85, Number 75 (April 17, 2020) Final Rule titled Airworthiness Directive 2020-08-10 addresses Robinson Helicopter Company Model R44 and R44 II helicopters equipped with tail rotor blades part numbers C029-1 or C029-2. This directive mandates inspections for cracks in the tail rotor blades to prevent potential loss of the tail rotor and subsequent loss of helicopter control.

What changed

This new airworthiness directive introduces mandatory visual inspections of the leading edges of specified tail rotor blades for cracks, particularly focusing on the inboard white paint stripe area. It requires these inspections within 50 hours time-in-service after the effective date and before each flight thereafter. The directive also updates contact information for Robinson Helicopter Company and clarifies inspection responsibilities.

Why it matters

This directive is critical for aviation professionals as it addresses a known unsafe condition caused by fatigue cracks in tail rotor blades, which can lead to catastrophic failure and loss of control. Operators and maintenance personnel must ensure compliance to maintain airworthiness and safety. The directive allows owner/operators with at least a private pilot certificate to perform the inspections, facilitating timely compliance and operational safety.

What to do

Summary

What changed

Why it matters

More for Robinson R44 (Raven)