AD 2009-18-20
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A330-300 | Airworthiness Directives; Airbus Model A330-300, A340-200, and A340-300 Series Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Airbus Model A330-300, A340-200, and A340-300 Series Airplanes |
Unsafe Condition
Rupture of the maintenance cover on standard MZ spoiler servo-controls due to pressure pulse fatigue, which may result in spoiler surface deflection up to the null-hinge position (loss of hydraulic locking) and loss of the associated hydraulic system. In the worst case, this could affect all three hydraulic systems, leading to reduced controllability of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect all standard MZ spoiler servo-controls with initial maintenance cover (P/N MZ4339390-01X, -02X, -10X for position 1 and P/N MZ4306000-01X, -02X, -10X for positions 2 to 6) and replace them with standard MZ servo-controls with reinforced maintenance cover (P/N MZ4339390-12 for position 1 and P/N MZ4306000-12 for positions 2 to 6).
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Airbus Model A330-300, A340-200, and A340-300 series airplanes; certificated in any category; equipped with standard MZ spoiler servo-controls with initial maintenance cover (P/N MZ4339390-01X, -02X, -10X for position 1 and P/N MZ4306000-01X, -02X, -10X for positions 2 to 6).
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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