AD 2012-16-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE | Systems (Operations) Limited | Airworthiness Directives; BAE Systems (Operations) Limited Airplanes |
Unsafe Condition
Cracking and surface anomalies of the fuselage skin at the water trap/air dryer unit of the forward discharge valve due to corrosion. These anomalies could propagate towards the forward discharge valve outlet, leading to fuselage skin failure and possible sudden loss of cabin pressure.
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Required Actions
Perform a detailed inspection for bulging, surface anomalies, and cracking of the fuselage skin adjacent to the discharge valve outlets within 12 months after the effective date. Repeat the inspection every 24 months. Repair any damage found within specified criteria before further flight. Apply additional sealant if necessary.
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Compliance Time
Within 12 months of the effective date
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Affected Aircraft
BAE Systems (Operations) Limited Model BAe 146-100A, -200A, and -300A airplanes, and Model Avro 146-RJ70A, 146-RJ85A, and 146-RJ100A airplanes, certificated in any category; all models, and all serial numbers except airplanes that have incorporated auto-pressurization modification HCM50259A during production.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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