AD 77-10-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 212 | Airworthiness Directives; Bell Model 212 Helicopter |
Unsafe Condition
Chordwise cracks in the main rotor blade skin from near the inboard end to near the outboard end and eroded scarf joint filler.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Check leading edge scarf joints for filler erosion, clean and fill eroded areas as specified. Inspect main rotor blades for skin cracks either visually at intervals not exceeding 4 hours' time in service or using a properly functioning Blade Inspection System (BIS) with checks before each first flight and every 4 hours. Modify BIS installations on specified blades within 300 hours' blade time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before the first flight of each day and at intervals not to exceed 4 hours' time in service from the last inspection. Compliance required as indicated.
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Affected Aircraft
Bell Model 212 helicopters with main rotor blades P/N 204-012-001-23, -29, -33, and specified serial numbers listed in Bell Service Bulletin No. 212-77-2 and 212-77-10, except those equipped with P/N 212-015-501 blades.
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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