AD 2021-20-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | Helicopters Model AS355E | Airworthiness Directives; Airbus Helicopters |
| aircraft | Aviat | Various | Airworthiness Directives; Airbus Helicopters |
Unsafe Condition
Cracking in the spar of the upper part of the vertical fin and fractures in the front attachment screws, which could lead to in-flight separation of the upper part of the vertical fin, resulting in loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Retain the requirements of AD 2021-04-15, and require repetitive cleaning and repetitive detailed inspections for cracking of the vertical fin spar and vertical fin upper attachments, and corrective action if necessary, as specified in an EASA AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Airbus Helicopters Model AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters; and certain Model AS350B3 helicopters.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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