AD 90-21-20
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A320-111 | Airworthiness Directives; AIRBUS INDUSTRIE Model A320-111, A320-211, and A320-231 Series Airplanes |
| aircraft | Airbus | A320-211 | Airworthiness Directives; AIRBUS INDUSTRIE Model A320-111, A320-211, and A320-231 Series Airplanes |
| aircraft | Airbus | A320-231 | Airworthiness Directives; AIRBUS INDUSTRIE Model A320-111, A320-211, and A320-231 Series Airplanes |
Unsafe Condition
Simultaneous activation in flight of two angle of attack sensors could result in an incorrect pitch-down command to the elevator.
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Required Actions
Disconnect and modify wiring in relay box 103VU, Zones 127 and 232 per Airbus Service Bulletin A320-34-1012 (Rev 1/2) or perform Modification No. 21824P1953 by moving test control wires per Service Bulletin A320-34-1013. Alternate means/adjustments require FAA approval.
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Compliance Time
within the next 350 hours time-in-service after the effective date of this AD
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Affected Aircraft
All Model A320-111, A320-211, and A320-231 series airplanes, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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