AD 98-04-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | M7 Aerospace LLC | SA226-AT | Airworthiness Directives; Fairchild Aircraft Incorporated Models SA226-TC, SA226-T, SA226-T(B), and SA226-AT Airplanes |
| aircraft | M7 Aerospace LLC | SA226-T | Airworthiness Directives; Fairchild Aircraft Incorporated Models SA226-TC, SA226-T, SA226-T(B), and SA226-AT Airplanes |
| aircraft | M7 Aerospace LLC | SA226-TC | Airworthiness Directives; Fairchild Aircraft Incorporated Models SA226-TC, SA226-T, SA226-T(B), and SA226-AT Airplanes |
| aircraft | M7 Aerospace LLC | SA226-T(B) | Airworthiness Directives; Fairchild Aircraft Incorporated Models SA226-TC, SA226-T, SA226-T(B), and SA226-AT Airplanes |
Unsafe Condition
Fatigue cracking of the wing trailing edge ribs due to high local stress concentration, which could cause asymmetrical flap deflection and force the airplane into an uncommanded roll with possible loss of control.
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Required Actions
Inspect the center flap hinge and wing trailing edge ribs at wing stations WS 98.385 and 100.635 for cracks. Replace any cracked rib with a new rib assembly (part numbers 27-31085-1/2, 27-31086-1/2, or FAA-approved equivalent) and install a reinforcement doubler (part number 27K36075-7 or FAA-approved equivalent) whether or not cracks are found.
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Compliance Time
before further flight
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Affected Aircraft
Fairchild Aircraft Incorporated Models SA226-TC, SA226-T, SA226-T(B) (serial numbers T(B)276, T(B)292 through T(B)378), and SA226-AT airplanes.
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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