AD 86-06-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | DH.125 Series 1A | Airworthiness Directives; BRITISH AEROSPACE Models DH 125-1A, DH 125-1A/522, DH 125-1A/S-522, and DH 125-3A Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A-522 | Airworthiness Directives; BRITISH AEROSPACE Models DH 125-1A, DH 125-1A/522, DH 125-1A/S-522, and DH 125-3A Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/S-522 | Airworthiness Directives; BRITISH AEROSPACE Models DH 125-1A, DH 125-1A/522, DH 125-1A/S-522, and DH 125-3A Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A | Airworthiness Directives; BRITISH AEROSPACE Models DH 125-1A, DH 125-1A/522, DH 125-1A/S-522, and DH 125-3A Airplanes |
Unsafe Condition
Loss of control due to asymmetric flaps caused by failure of the flap drive torque shaft assemblies.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the left-hand and right-hand flap drive torque shaft assemblies, repair or replace as necessary in accordance with British Aerospace Service Bulletins 27-A140 (dated March 10, 1986) or 27-140 (dated April 1, 1986).
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
British Aerospace Models DH 125-1A, DH 125-1A/522, DH 125-1A/S-522, and DH 125-3A airplanes, all serial numbers.
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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