AD 85-18-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Erickson Air-Crane | S-64E | Airworthiness Directives; SIKORSKY AIRCRAFT Model S-64E Helicopters |
Unsafe Condition
The possible loss of the main rotor blade outboard spar and subsequent loss of the counterweight train.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect main rotor blade outboard spars (P/N 6415-20201-043 and -045) within 30 hours time in service after the effective date, and thereafter every 30 hours. Fluorescent penetrant inspect the same parts within 30 hours time in service after the effective date (unless done in last 120 hours) and then every 150 hours. Replace cracked blades before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 30 hours time in service after the effective date of this AD, and thereafter at intervals not to exceed 30 hours time in service from the last inspection (for visual inspection). For fluorescent penetrant inspection: within the next 30 hours time in service after the effective date (unless already accomplished within the last 120 hours time in service), and thereafter at intervals of 150 hours time in service from the last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Aircraft Model S-64E helicopters, certificated in all categories.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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