AD 97-25-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | ATP | Airworthiness Directives; British Aerospace BAe Model ATP and Model HS 748 Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | HS 748 Series 2A | Airworthiness Directives; British Aerospace BAe Model ATP and Model HS 748 Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | HS 748 Series 2B | Airworthiness Directives; British Aerospace BAe Model ATP and Model HS 748 Series Airplanes |
Unsafe Condition
Corrosion of the cylinder tube of the main hydraulic accumulator could result in loss of certain hydraulic system functions, including nose wheel steering, hydraulic lowering of the landing gear, and main wheel brakes, which are essential for safe operation of the airplane.
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Required Actions
Within 30 days after the effective date of this AD, inspect the main hydraulic accumulator for corrosion in accordance with British Aerospace Service Bulletin ATP-29-15 or HS748-29-49. If discrepancies are found, accomplish applicable corrective actions specified in the service bulletins prior to further flight.
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Compliance Time
Within 30 days after the effective date of this AD
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Affected Aircraft
BAe Model ATP airplanes having constructor’s numbers 2002 through 2063 inclusive; and all Model HS 748 series airplanes; certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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