AD 2018-19-30
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE | Systems (Operations) Limited | Airworthiness Directives; BAE Systems (Operations) Limited Airplanes |
Unsafe Condition
During scheduled maintenance, it was noted that on the extinguisher cartridge, the blue spacer around the electrical pins appeared to be located too far forward. It was discovered that, inadvertently, an additional spacer (possibly from a previous extinguisher cartridge) was located in the extinguisher cartridge connector. This effectively shortens the electrical pins in the cartridge connector, which could result in insufficient engagement with the associated sockets on the aeroplane connector. A missing spacer would not affect the electrical connection between the extinguisher cartridge and the aeroplane wiring, but could allow moisture ingress over time.
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Required Actions
Inspect the extinguisher cartridge electrical connector and the aeroplane's electrical connector for missing or excessive spacers. Remove excessive spacers or replace the fire extinguisher bottle.
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Compliance Time
Before further flight
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Affected Aircraft
BAE Systems (Operations) Limited Model 4101 airplanes, all serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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