AD 78-01-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | BH.125 Series 400A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LIMITED Model DH/BH/HS-125 Airplanes |
| aircraft | Textron Aviation Inc. | BH.125 Series 600A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LIMITED Model DH/BH/HS-125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LIMITED Model DH/BH/HS-125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LIMITED Model DH/BH/HS-125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/R-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LIMITED Model DH/BH/HS-125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/S-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LIMITED Model DH/BH/HS-125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LIMITED Model DH/BH/HS-125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/R | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LIMITED Model DH/BH/HS-125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/RA | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LIMITED Model DH/BH/HS-125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 400A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LIMITED Model DH/BH/HS-125 Airplanes |
Unsafe Condition
Detachment of the bolts securing the elevator control pulley bracket to the aircraft structure
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the four bolts with 25-6CF 519 or NAS 1304-10H bolts and safety wire replacement bolts in pairs per Hawker Siddeley Aviation, Ltd. Modification Service Bulletin 27-122(2578) or FAA-approved equivalent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 10 hours time in service after the effective date of this AD (for BH/HS-125-600A aircraft) and within 100 hours time in service after the effective date (for all other DH/BH-125 aircraft)
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
HAWKER SIDDELEY AVIATION, LIMITED Model DH/BH/HS-125 airplanes, certificated in all categories
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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