AD 2012-23-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Erickson | Air-Crane Incorporated | Airworthiness Directives; Erickson Air-Crane Incorporated Helicopters |
Unsafe Condition
Cracking or working rivets in the left and right splice fitting (transition fitting), pylon bulkhead assembly-canted (bulkhead assembly), and pylon steel strap (strap) due to fatigue, which could lead to failure from static overload and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect for cracking or working rivets in each left and right splice fitting, pylon bulkhead assembly-canted, and pylon steel strap. Repair or replace any cracked or damaged part with an airworthy part. Replace any loose or working rivet.
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
Erickson Air-Crane Incorporated Model S-64F helicopters with transition fitting, part number (P/N) 6420-66341-101, -102, -103, or -104; bulkhead assembly, P/N 6420-66340-043 or -044; or a strap, P/N 6420-66301-119 or -127, installed.
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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