AD 2011-26-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A330-200 and -300 | Airworthiness Directives; Airbus Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Airbus Airplanes |
Unsafe Condition
A soldering quality issue on one of the internal cards of the fire detection unit (FDU) part number 3711-00, resulting from a specific repair process during manufacturing, may adversely affect the fire detection system performance in case of a fire in the monitored areas, potentially resulting in an unsafe condition.
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Required Actions
Within 1,000 flight hours after the effective date, inspect to identify the FDU part number and serial number for each engine, APU, and MLG bay (for A340-500 and -600 series airplanes only). If an FDU with P/N 3711-00 is found and its serial number is listed in the AD table, replace it with a serviceable FDU before further flight.
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Compliance Time
Within 1,000 flight hours after the effective date, with replacement required before further flight if the faulty FDU is identified.
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Affected Aircraft
Airbus Model A330-200 and -300 series airplanes, Model A340-200 and -300 series airplanes, and Model A340-500 and -600 series 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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