AD 2011-17-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A330-200 | Airworthiness Directives; Airbus Model A330-200, A330-300, A340-300, A340-500, and A340-600 Series Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Airbus Model A330-200, A330-300, A340-300, A340-500, and A340-600 Series Airplanes |
Unsafe Condition
Loose gyrometer screws in the Back-up Control Module (BCM) may cause oscillation of the BCM output order, leading to degradation of BCM piloting laws and potential erratic motion of the rudder. Additionally, loose or broken screws in the Pedal Feel Trim Units (PFTU) could result in loss of coupling between the RVDT shaft and PFTU shaft, potentially causing rudder runaway when the BCM is activated.
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Required Actions
Install a new BCM on A330 and A340-200/-300 series airplanes fitted with electrical rudder. Install an improved PFTU on A330 and A340-200/-300 series airplanes fitted with electrical rudder and A340-500/600 series airplanes.
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Compliance Time
Within 12 months of the effective date (September 26, 2011)
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Affected Aircraft
Airbus Model A330-200, A330-300, A340-300, A340-500, and A340-600 series airplanes with Airbus modification 49144 (install electrical rudder), excluding those with Airbus modifications 58118 and 200667.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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