AD 72-19-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | All Aircraft | Nickel Cadmium Battery | Airworthiness Directives; NICKEL-CADMIUM BATTERY: Applies to all Aircraft Having a Primary Electrical System that Includes a Nickel-Cadmium Battery |
Unsafe Condition
A possible battery fire may result from overheating caused by an undetected battery failure.
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Required Actions
Replace cells or batteries with polyamide cases if they have polystyrene cases. Visually inspect batteries for heat damage every 7 days or 30 hours, whichever is later. If heat damage is found, replace the battery or disconnect it before flight. Install a battery charging rate control system, temperature sensing with over-temperature warning, or failure sensing system with disconnect procedures by February 1, 1974. Operators may request extensions with a compliance program.
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Compliance Time
Compliance is required as indicated.
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Affected Aircraft
All aircraft with a primary electrical system including a nickel-cadmium battery capable of engine/APU start, except those with automatic charging control, temperature sensing/over-temperature warning, or failure sensing systems, and Learjet Models 23, 24, and 25.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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