AD 89-26-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | BAe 146-100A | Airworthiness Directives; BRITISH AEROSPACE Model 146-100A, -200A and -300A Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-200A | Airworthiness Directives; BRITISH AEROSPACE Model 146-100A, -200A and -300A Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-300A | Airworthiness Directives; BRITISH AEROSPACE Model 146-100A, -200A and -300A Series Airplanes |
Unsafe Condition
Loss of roll control could occur if a jam in the aileron control system happens due to potential failure modes in Fraser Nash Part Number AO-100-902 or Normalair-Garrett, Ltd. Part Numbers 1099R000, 1224R000, or 1295R000 aileron disconnect units (ADUs).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Determine installed ADU part numbers and modify NGL 1295R000 ADUs to BAe HCM70212C configuration. Inspect and replace failed Fraser Nash AO-100-902 and NGL 1099R000/1224R000 ADUs. Modify NGL 1099R000/1224R000 ADUs to BAe HCM70212A&B and HCM70212C configurations within one year.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 60 days after the effective date of this AD and within one year after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
BAE Systems (Operations) Limited Model BAe 146-100A, -200A, and -300A series airplanes certificated in any category.
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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