AD 2020-13-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Leonardo | S.p.A. | Airworthiness Directives; Leonardo S.p.A. Helicopters |
Unsafe Condition
A disassembled connection between the yaw control input lever and the rotating input shaft, partial presence of spalling on the T/R duplex bearing inner races, and missing plug and related lockwire. This condition, if not corrected, could lead to functional failure of the T/R pitch change mechanism, resulting in loss of control of the helicopter.
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Required Actions
Inspecting the T/R pitch change mechanism and installation of additional locking wire. Depending on findings, corrective actions may be required. If there is no movement and the tightening torque of the T/R plug is at least 30.5 Nm, install lockwire before further flight. If there is any movement or the tightening torque is less than 30.5 Nm, inspect for presence of the P/N and S/N markings of the outboard and inboard faces of T/R duplex bearing, inspect the T/R duplex bearing for rough rotation, brinelling, spalling, chipping, flaking, evidence of overheated bearing balls, and damage to the races, and inspect for damaged threads of the T/R plug and nut before further flight. If the P/N and S/N markings are visible on the outboard or inboard face of the T/R duplex bearing, the T/R duplex bearing has any rough rotation, brinelling, spalling, chipping, flaking, evidence of overheated bearing balls, or damage to the races, or if the nut has any damaged threads, remove the T/R duplex bearing, internal spacer, external spacer, bearing liner assembly, and T/R control rod from service before further flight. If the T/R plug or nut has any damaged threads, remove the affected part from service before further flight. Assemble and install the T/R duplex assembly by following related service information procedures. Report inspection results to Leonardo Helicopters if there is any T/R plug movement or if its tightening torque is not at least 30.5 Nm and any parts that must be removed from service. Prohibit installing a T/R duplex bearing on any helicopter unless it has been inspected.
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Compliance Time
Within 10 hours time-in-service (TIS), inspect for movement and the tightening torque of the T/R plug. If there is no movement and the tightening torque is at least 30.5 Nm, install lockwire before further flight. Thereafter, within 50 hours TIS, inspect for presence of the P/N and S/N markings of the outboard and inboard faces of T/R duplex bearing, inspect the T/R duplex bearing for rough rotation, brinelling, spalling, chipping, flaking, evidence of overheated bearing balls, and damage to the races, and inspect for damaged threads of the T/R plug and nut. If there is any movement or the tightening torque is less than 30.5 Nm, inspect for presence of the P/N and S/N markings of the outboard and inboard faces of T/R duplex bearing, inspect the T/R duplex bearing for rough rotation, brinelling, spalling, chipping, flaking, evidence of overheated bearing balls, and damage to the races, and inspect for damaged threads of the T/R plug and nut before further flight.
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Affected Aircraft
Leonardo S.p.A. Model A119 and AW119 MKII helicopters with a serial number (S/N) up to 14966 inclusive, except S/N 14950, 14957, and 14961 through 14963 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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