AD 98-07-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | Avro 146-RJ100A | Airworthiness Directives; British Aerospace Model BAe 146-100A, -200A, and -300A, and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | Avro 146-RJ70A | Airworthiness Directives; British Aerospace Model BAe 146-100A, -200A, and -300A, and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | Avro 146-RJ85A | Airworthiness Directives; British Aerospace Model BAe 146-100A, -200A, and -300A, and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-100A | Airworthiness Directives; British Aerospace Model BAe 146-100A, -200A, and -300A, and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-200A | Airworthiness Directives; British Aerospace Model BAe 146-100A, -200A, and -300A, and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-300A | Airworthiness Directives; British Aerospace Model BAe 146-100A, -200A, and -300A, and Model Avro 146-RJ Series Airplanes |
Unsafe Condition
Reduced structural integrity of the stabilizer attachment brackets due to intergranular corrosion, which could result in reduced controllability of the airplane.
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Required Actions
Perform repetitive inspections of the attachment brackets between the horizontal and vertical stabilizers to detect intergranular corrosion, following British Aerospace Service Bulletin SB.55-15. If corrosion is found, blend out corrosion and re-protect areas, or repair if beyond limits. Apply additional surface protection after inspections. Repeat inspections every 12,000 flight cycles or 4 years, whichever comes first.
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Compliance Time
Within 20, 32, or 44 months after May 4, 1998, depending on the airplane's constructor number as specified in the service bulletin. Repeat inspections at intervals not exceeding 12,000 flight cycles or 4 years after the initial inspection, whichever occurs first.
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Affected Aircraft
British Aerospace Model BAe 146-100A, -200A, -300A, and Avro 146-RJ70A, -85A, -100A airplanes with constructor numbers: BAe 146 models (all), Avro 146-RJ70/70A up to E1267, Avro 146-RJ85/85A up to E2300, and Avro 146-RJ100/100A up to E3301.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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