AD 99-02-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A320-111 | Airworthiness Directives; Airbus Model A320 and A321 Series Airplanes |
| aircraft | Airbus | A320-211 | Airworthiness Directives; Airbus Model A320 and A321 Series Airplanes |
| aircraft | Airbus | A320-212 | Airworthiness Directives; Airbus Model A320 and A321 Series Airplanes |
| aircraft | Airbus | A320-214 | Airworthiness Directives; Airbus Model A320 and A321 Series Airplanes |
| aircraft | Airbus | A320-231 | Airworthiness Directives; Airbus Model A320 and A321 Series Airplanes |
| aircraft | Airbus | A320-232 | Airworthiness Directives; Airbus Model A320 and A321 Series Airplanes |
| aircraft | Airbus | A320-233 | Airworthiness Directives; Airbus Model A320 and A321 Series Airplanes |
| aircraft | Airbus | A321-111 | Airworthiness Directives; Airbus Model A320 and A321 Series Airplanes |
| aircraft | Airbus | A321-112 | Airworthiness Directives; Airbus Model A320 and A321 Series Airplanes |
| aircraft | Airbus | A321-131 | Airworthiness Directives; Airbus Model A320 and A321 Series Airplanes |
Unsafe Condition
Failure of the slat and flap control computer (SFCC) caused by computer software anomalies or contamination by conductive dust, which could result in uncommanded slat retraction during takeoff and consequent insufficient wing lift available to complete a successful takeoff.
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Required Actions
Modify the slat and flap control computer (SFCC 1 and SFCC 2) in the aft electronics rack in accordance with specified Airbus Service Bulletins within 24 months after the effective date of this AD. The modification must follow the procedures in the referenced service bulletins.
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Compliance Time
Within 24 months after the effective date of this AD
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Affected Aircraft
Airbus Model A320 series (A320-111, A320-211, A320-212, A320-214, A320-231, A320-232, A320-233) and A321 series (A321-111, A321-112, A321-131) airplanes, as listed in the referenced Airbus Service Bulletins.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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