AD 77-13-09 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | BH.125 Series 400A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH 125 Airplanes Series |
| aircraft | Textron Aviation Inc. | BH.125 Series 600A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH 125 Airplanes Series |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH 125 Airplanes Series |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH 125 Airplanes Series |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/R-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH 125 Airplanes Series |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/S-522 | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH 125 Airplanes Series |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH 125 Airplanes Series |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/R | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH 125 Airplanes Series |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/RA | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH 125 Airplanes Series |
| aircraft | Textron Aviation Inc. | DH.125 Series 400A | Airworthiness Directives; HAWKER SIDDELEY AVIATION, LTD Model DH/BH 125 Airplanes Series |
Unsafe Condition
The structural integrity of the bulkhead may be compromised due to fatigue cracking.
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Required Actions
Incorporate Hawker Siddeley modifications 25-2402 and 25-2207 in accordance with Service Bulletin 53-46-(2402), Revision 2. Airplanes exceeding 6500 landings or 9-1/2 years since manufacture must be modified within the next 100 landings or 6 months after the effective date.
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Compliance Time
Prior to the accumulation of 6600 total landings or 10 years after manufacture, whichever occurs first. For airplanes already exceeding thresholds, within the next 100 landings or 6 months after the effective date of this amendment, whichever occurs first.
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Affected Aircraft
HAWKER SIDDELEY AVIATION, LTD Model DH/BH 125 airplanes series 1A up to and including series 600A 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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