AD 80-12-13
Unsafe Condition
Failure of the main engine mount beam
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Required Actions
Within 500 hours time in service after the effective date, modify the main engine mount beam per British Aerospace Service Bulletin 49-28(2675), Rev. 2, or an FAA-approved equivalent. FAA approval for equivalents (except cleats) may be granted by FAA inspectors, while cleats require approval from the Chief, Aircraft Certification Staff, FAA Europe, Africa, and Middle East Office.
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Compliance Time
Within the next 500 hours time in service after the effective date of this AD
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Affected Aircraft
DH/HS 125 Series 1, 3; HS/BH 125 Series 400, 401, 403, 600; HS 125 Series 700 with specific serial numbers listed in the AD, incorporating British Aerospace modification 251605 and any of the listed APUs, service bulletins, or modifications.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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