AD 76-17-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | BH.125 Series 400A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH-125, 400A, DH/BH-125 1A, 1A-522, 1A/S-522, 3A, 3AR, 3ARA Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH-125, 400A, DH/BH-125 1A, 1A-522, 1A/S-522, 3A, 3AR, 3ARA Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH-125, 400A, DH/BH-125 1A, 1A-522, 1A/S-522, 3A, 3AR, 3ARA Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/S-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH-125, 400A, DH/BH-125 1A, 1A-522, 1A/S-522, 3A, 3AR, 3ARA Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH-125, 400A, DH/BH-125 1A, 1A-522, 1A/S-522, 3A, 3AR, 3ARA Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/R | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH-125, 400A, DH/BH-125 1A, 1A-522, 1A/S-522, 3A, 3AR, 3ARA Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/RA | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH-125, 400A, DH/BH-125 1A, 1A-522, 1A/S-522, 3A, 3AR, 3ARA Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 400A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH-125, 400A, DH/BH-125 1A, 1A-522, 1A/S-522, 3A, 3AR, 3ARA Series Airplanes |
Unsafe Condition
Possible unwanted deployment of airbrakes in flight due to inadequate design of airbrake servodynes and operating circuit.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify airbrake servodynes (P/N AIR 45398/45399) per Part A of Service Bulletin 27-86-(2174) unless already altered with P/N AIR 46520/0 or 46521/0. Modify airbrake operating circuit (R/H and L/H) per Part C of the same Service Bulletin. Compliance must be done within the next 200 hours time in service after the effective date.
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Compliance Time
within the next 200 hours time in service after the effective date of this AD
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Affected Aircraft
Model DH/BH-125 Series 400A (S/N NA-711 through NA-758) and all Model DH/BH-125 Series 1A, 1A-522, 1A/S-522, 3A, 3AR, 3ARA 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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