AD 98-06-19
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Embraer S.A. | EMB-145 | Airworthiness Directives; EMPRESA BRASILEIRA DE AERONAUTICA S.A. (EMBRAER) Model EMB-145 Series Airplanes |
| aircraft | Embraer S.A. | EMB-145ER | Airworthiness Directives; EMPRESA BRASILEIRA DE AERONAUTICA S.A. (EMBRAER) Model EMB-145 Series Airplanes |
Unsafe Condition
Moisture penetration into the ground spoiler and speed brake actuators in combination with freezing temperatures can result in jamming of the actuators, leading to asymmetric deployment of the speed brakes during flight and consequent reduced controllability, or failure of the ground spoilers to deploy during landing or rejected takeoff.
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Required Actions
Drain and seal the ground spoiler and speed brake actuators within 400 flight hours after the effective date. Replace the spoiler actuator assembly and speed brake actuator assembly with modified assemblies within 90 days after the effective date. Do not install actuator assemblies with part numbers 360440-1001 or 360540-1001.
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Compliance Time
Within 400 flight hours after the effective date of this AD for draining and sealing; within 90 days after the effective date for replacement of assemblies. Airplanes completing replacements within the 400 flight hour window are exempt from the draining requirement.
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Affected Aircraft
EMBRAER Model EMB-145 series airplanes, serial numbers 145004 through 145018 inclusive; equipped with speed brake actuator part number 360540-1001 or spoiler actuator part number 360440-1001.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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