AD 87-18-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Intreprinderea De Constructii Aeronautice | IS-28B2 | Airworthiness Directives; INTREPRINDEREA DE CONSTRUCTII AERONAUTICE Model IS-28B2 Gliders |
Unsafe Condition
Failure of the aileron control levers and forks could result in the glider becoming uncontrollable.
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Required Actions
Within 5 hours time-in-service after the effective date, visually inspect the aileron control levers P/N 30AD.02.028 and aluminum NIA 181-2 forks using a 10 power or greater magnifying glass for cracks or deformation. If cracked or deformed parts are found, replace them with new design P/N 30AD.02.028 levers and steel NIA 201-2 forks as per Service Bulletin IS-28B2-E0-14. By September 30, 1987, replace any remaining non-compliant levers and forks with the new design parts.
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Compliance Time
Within the next 5 hours time-in-service after the effective date unless compliance with paragraph (c) has been accomplished, and prior to September 30, 1987.
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Affected Aircraft
Intreprinderea De Constructii Aeronautice Model IS-28B2 gliders through serial number 160 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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