AD 93-02-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 412 | Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., (BHTI) Model 412 Helicopters |
Unsafe Condition
Failure of the vertical fin spar cap assembly, which could result in loss of the vertical fin 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 the vertical fin spar cap assembly (P/N 212-030-447-001) within 25 hours time in service after the effective date, and every 25 hours thereafter until replaced with P/N 212-030-447-101. Replace the spar cap assembly before further flight if cracks, corrosion, or doubler debonding are found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours time in service after the effective date of this AD, and every 25 hours time in service thereafter until replaced.
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Affected Aircraft
BHTI Model 412 helicopters, serial numbers 33001 through 33120 and serial numbers 34001 through 34012, certificated in any category.
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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