AD 91-03-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A | Airworthiness Directives; BRITISH AEROSPACE Model BAe 125-800A, HS 125-700A, DH/HS/BH 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A (C-29A) | Airworthiness Directives; BRITISH AEROSPACE Model BAe 125-800A, HS 125-700A, DH/HS/BH 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A (U-125) | Airworthiness Directives; BRITISH AEROSPACE Model BAe 125-800A, HS 125-700A, DH/HS/BH 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | BH.125 Series 400A | Airworthiness Directives; BRITISH AEROSPACE Model BAe 125-800A, HS 125-700A, DH/HS/BH 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | BH.125 Series 600A | Airworthiness Directives; BRITISH AEROSPACE Model BAe 125-800A, HS 125-700A, DH/HS/BH 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A | Airworthiness Directives; BRITISH AEROSPACE Model BAe 125-800A, HS 125-700A, DH/HS/BH 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A-522 | Airworthiness Directives; BRITISH AEROSPACE Model BAe 125-800A, HS 125-700A, DH/HS/BH 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/R-522 | Airworthiness Directives; BRITISH AEROSPACE Model BAe 125-800A, HS 125-700A, DH/HS/BH 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/S-522 | Airworthiness Directives; BRITISH AEROSPACE Model BAe 125-800A, HS 125-700A, DH/HS/BH 125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A | Airworthiness Directives; BRITISH AEROSPACE Model BAe 125-800A, HS 125-700A, DH/HS/BH 125 Series Airplanes |
Unsafe Condition
Overheating of the battery and loss of the pilot's and co-pilot's primary and standby heading and attitude information displays.
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Required Actions
Within 30 days after the effective date, perform a visual inspection of the Generator Control Unit (GCU) earth wire per British Aerospace Service Bulletin 24-A278. If no damage is found, perform a continuity check prior to further flight; if continuity exists, no further action is required. If damage or lack of continuity is found, replace the earth wire prior to further flight.
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 prior to further flight as required.
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Affected Aircraft
All Model BAe 125-800A and HS 125-700A series airplanes pre-Modification 253159; and all pre-Modification 253159 Model DH/HS/BH 125 series airplanes retrofitted with Garrett TFE 731 engines, 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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