AD 2015-16-04
Unsafe Condition
A fire extinguisher failed to operate when the activation lever was pressed, potentially leading to failure in the event of a fire.
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Required Actions
Modify the affected fire extinguishers, including applying adhesive to the gland nut as specified in the service bulletin.
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Compliance Time
Within 12 months of the effective date (September 15, 2015).
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Affected Aircraft
Kidde Graviner hand-operated fire extinguishers with part numbers 56412-001 (34H), 56411-001 (35H), and 56412-002 (38H), installed on various aircraft models including BAE Systems ATP and 4101, Airbus Defense and Space C-212 series, Fokker F.27 series, Short Brothers SD3 series, and SC-7 series aircraft.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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