AD 98-16-23
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | EADS CASA | CN-235 | Airworthiness Directives; Construcciones Aeronauticas, S.A. (CASA) Model CN-235 Series Airplanes |
| aircraft | EADS CASA | CN-235-100 | Airworthiness Directives; Construcciones Aeronauticas, S.A. (CASA) Model CN-235 Series Airplanes |
| aircraft | EADS CASA | CN-235-200 | Airworthiness Directives; Construcciones Aeronauticas, S.A. (CASA) Model CN-235 Series Airplanes |
| aircraft | EADS CASA | CN-235-300 | Airworthiness Directives; Construcciones Aeronauticas, S.A. (CASA) Model CN-235 Series Airplanes |
Unsafe Condition
Cracking in the flap transmission shafts and malfunctioning flap braking sub-system could result in inability to move the flaps or asymmetric flap condition, leading to reduced controllability of the airplane.
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Required Actions
Perform a high frequency eddy current (HFEC) inspection of the flap transmission shafts and a functional test of the flap braking sub-system within specified intervals. Repeat inspections at intervals not exceeding 2,000 landings for shafts and 300 landings for braking sub-system if no issues found; replace components and repeat inspections if cracking or malfunction detected.
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Compliance Time
Prior to the accumulation of 6,000 total landings, or within 30 days after the effective date of this AD, whichever occurs later.
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Affected Aircraft
Construcciones Aeronauticas, S.A. (CASA) Model CN-235 series airplanes, 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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