Manufacturer
Bell
Number
Transport Canada 2019-34
Model(s)
206, 206A/A-1, 206B/B-1, 206L/L-1/L-3/L-4
Published Date
Effective Date
Summary
Requires replacing the MS21042 nuts of the tail rotor drive couplings with NAS9926 nuts within 600 hours flight time or 24 months from the effective date of this AD, whichever occurs first. Also MS21042-series nuts are not eligible for installation at the tail rotor drive shaft disc pack couplings after 24 months. Prompted by reports of cracked or missing MS21042-series nuts.
UUID
185