AD 98-11-27
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | 328 Support Services GmbH | 328-100 | Airworthiness Directives; DORNIER LUFTFAHRT GmbH Model 328-100 Series Airplanes |
Unsafe Condition
Failure of the pressure dump and relief valves in the main and auxiliary hydraulic systems could cause a loss in hydraulic pressure for roll control spoilers and brakes, and consequent reduced controllability of the airplane.
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Required Actions
Replace existing pressure dump and relief valves (part number ZHV29-1) with new valves (part number ZHV29-2) in the main and auxiliary hydraulic systems, in accordance with Dornier Service Bulletin SB-328-29-205. No installation of valves with P/N ZHV29-1 is allowed after the effective date.
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Compliance Time
Within 8 months after the effective date of this AD
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Affected Aircraft
DORNIER LUFTFAHRT GmbH Model 328-100 series airplanes, serial numbers 3005 through 3095 inclusive
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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