AD 92-10-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | BH.125 Series 400A | Airworthiness Directives; BRITISH AEROSPACE Model DH/BH/HS 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | BH.125 Series 600A | Airworthiness Directives; BRITISH AEROSPACE Model DH/BH/HS 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A | Airworthiness Directives; BRITISH AEROSPACE Model DH/BH/HS 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A-522 | Airworthiness Directives; BRITISH AEROSPACE Model DH/BH/HS 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/R-522 | Airworthiness Directives; BRITISH AEROSPACE Model DH/BH/HS 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/S-522 | Airworthiness Directives; BRITISH AEROSPACE Model DH/BH/HS 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A | Airworthiness Directives; BRITISH AEROSPACE Model DH/BH/HS 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/R | Airworthiness Directives; BRITISH AEROSPACE Model DH/BH/HS 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/RA | Airworthiness Directives; BRITISH AEROSPACE Model DH/BH/HS 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 400A | Airworthiness Directives; BRITISH AEROSPACE Model DH/BH/HS 125 Series Airplanes |
Unsafe Condition
Reduced structural integrity of the wings due to corrosion beneath the boundary layer fence on the wing upper skins.
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Required Actions
Visually inspect left and right wing upper skins for corrosion beneath the boundary layer fence within 3 months after the effective date. Repair corroded parts within specified limits per SB 57-73 prior to further flight; repair exceeding limits requires an approved method. Submit inspection findings report within 10 days post-inspection.
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Compliance Time
Within 3 months after the effective date of this AD
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Affected Aircraft
Model DH/BH/HS 125 series airplanes excluding Model 125-700A, -800A, and -1000A series, as listed in British Aerospace Service Bulletin S.B. 57-73 dated July 30, 1991.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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