AD Amdt-39-9578
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | de Havilland | DHC-3 | Airworthiness Directives; de Havilland Model DHC-3 Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; de Havilland Model DHC-3 Airplanes |
Unsafe Condition
Failure of the tailplane structure caused by cracked tailplane main rib forward flanges or main rib forward lower flanges at the tailplane front attachment fitting.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Continue repetitive inspections using dye penetrant methods for cracks on tailplane main rib forward flanges and main rib forward lower flanges at the tailplane front attachment fitting. Allow installation of new angles and plates on tailplane root ribs as a terminating action for these inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
de Havilland Model DHC-3 airplanes affected by AD 90-12-08
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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