AD 75-13-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | BH.125 Series 400A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Models DH/BH. 125 Airplanes |
| aircraft | Textron Aviation Inc. | BH.125 Series 600A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Models DH/BH. 125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Models DH/BH. 125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Models DH/BH. 125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/R-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Models DH/BH. 125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/S-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Models DH/BH. 125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Models DH/BH. 125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/R | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Models DH/BH. 125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/RA | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Models DH/BH. 125 Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 400A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Models DH/BH. 125 Airplanes |
Unsafe Condition
Failure of cockpit side window Panel "C" assemblies due to original part numbers 25FN57A(L/H), 25FN4865A, 25FN4865A/B(L/H), 25FN58A(R/H), 25FN4866A, or 25FN4866A/B(R/H).
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Required Actions
Remove original cockpit side window Panel "C" assemblies with specified part numbers and install replacement parts per Hawker Siddeley Alert Service Bulletin 56-A16, Rev 1, and Modification Service Bulletin 56-16 (2410), Rev 2, or FAA-approved equivalent.
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Compliance Time
Within two calendar years time in service on original cockpit side window Panel "C" assemblies, or 25 hours time in service on such panels after August 15, 1975, whichever occurs later.
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Affected Aircraft
Hawker Siddeley DH/BH. 125 airplanes certificated in all categories.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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