AD 97-04-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | Avro 146-RJ100A | Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | Avro 146-RJ70A | Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | Avro 146-RJ85A | Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-100A | Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-200A | Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-300A | Airworthiness Directives; British Aerospace Models BAe 146 and Model Avro 146-RJ Series Airplanes |
Unsafe Condition
Leakage of hydraulic fluid from the lock jack assemblies of the main landing gear (MLG) due to a manufacturing forging defect that extends through the wall of the lock jack assembly. This leakage, in conjunction with a hot brake, could cause a fire in the MLG bay.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 30 days after the effective date, verify the serial numbers of all MLG lock jack assemblies. If any assembly has a serial number listed in SB 32-103, inspect for hydraulic fluid leakage before further flight. Repeat inspections every 30 days until replacements are done. Within 6 months, replace affected lock jack assemblies with new or serviceable units. Prohibit installation of affected assemblies after the effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 days after the effective date of this AD, and within 6 months after the effective date for replacements. Compliance is required prior to further flight for inspections detecting leakage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
British Aerospace Models BAe 146 series and Avro 146-RJ series airplanes with lock jack assemblies listed in SB 32-103, Revision 1.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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