AD 83-22-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | HS.125 Series 600A | Airworthiness Directives; BRITISH AEROSPACE AIRCRAFT GROUP (HATFIELD-CHESTER DIVISION) Model HS 125 Series Aircraft |
| aircraft | Textron Aviation Inc. | HS.125 Series 700A | Airworthiness Directives; BRITISH AEROSPACE AIRCRAFT GROUP (HATFIELD-CHESTER DIVISION) Model HS 125 Series Aircraft |
Unsafe Condition
Failure of the cold air unit fan could result in fragmentation damaging the main engine beam.
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Required Actions
Install a fragmentation guard around the fan housing of the cold air unit per Service Bulletin 21-123-(2815), Revision 2. Alternate means of compliance may be approved by the FAA. Special flight permits may be issued under FAR 21.197 and 21.199.
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Compliance Time
within 120 days after the effective date of this AD
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Affected Aircraft
Model HS 125 (pre-Modification 251600) with serial numbers listed in the Planning Information of the service bulletin.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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