AD 2021-05-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Leonardo | S.p.a. | Airworthiness Directives; Leonardo S.p.a. Helicopters |
Unsafe Condition
The failure of a bolt could result in reduced control of the helicopter.
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Required Actions
Inspect each forward attachment bolt for a missing bolt head, breakage, and correct installation as depicted in Figure 12 of Leonardo Helicopters Emergency Alert Service Bulletin No. 189-177, Revision A, dated February 28, 2018. If there is a missing bolt head, a broken bolt, or an incorrectly installed bolt, remove the bolt from service and install the tail plane retromod by following the Accomplishment Instructions, Part II, paragraphs 3.1 through 3.33 of EASB 189-177. Torque the associated nut part number (P/N) MS17825-7 to the specified torque value. Inspect and verify the torque of the bolts and nuts at intervals not to exceed 50 hours time-in-service (TIS).
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Compliance Time
Before further flight and thereafter before each flight
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Affected Aircraft
Leonardo S.p.a. Model AW189 helicopters, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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