AD 2005-18-23
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 737-600 | Airworthiness Directives; Boeing Model 737-600, -700, -700C, -800, and -900 Series Airplanes |
Unsafe Condition
Corrosion of electrical connectors in the wheel well of the main landing gear (MLG) due to exposure to runway deicing fluids containing potassium formate or potassium acetate, which could result in moisture ingress, electrical shorts, and incorrect functioning of critical airplane systems essential to safe flight and landing, including fire warning systems.
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Required Actions
Inspect the electrical connectors in the wheel well of the MLG for corrosion. Perform follow-on actions as necessary to address identified corrosion. Operators may choose to either determine exposure to runway deicing fluids containing potassium formate or potassium acetate, or perform repetitive inspections of the electrical connectors at intervals not to exceed 12 months.
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Compliance Time
Within 90 days for airplanes exposed to potassium formate or potassium acetate, and thereafter at intervals not to exceed 12 months. For airplanes not exposed, inspections are required at intervals not to exceed 12 months.
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Affected Aircraft
Boeing Model 737-600, -700, -700C, -800, and -900 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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