AD 97-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A | Airworthiness Directives; Raytheon Model BAe 125-800A Series Airplanes and Hawker 800 Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A (C-29A) | Airworthiness Directives; Raytheon Model BAe 125-800A Series Airplanes and Hawker 800 Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A (U-125) | Airworthiness Directives; Raytheon Model BAe 125-800A Series Airplanes and Hawker 800 Series Airplanes |
| aircraft | Textron Aviation Inc. | Hawker 800 | Airworthiness Directives; Raytheon Model BAe 125-800A Series Airplanes and Hawker 800 Series Airplanes |
| aircraft | Textron Aviation Inc. | Hawker 800 (U-125A) | Airworthiness Directives; Raytheon Model BAe 125-800A Series Airplanes and Hawker 800 Series Airplanes |
Unsafe Condition
Heat damage to the fuel feed hose assemblies of the auxiliary power unit (APU) could lead to a possible fire/smoke hazard if failure of the hose assembly occurs and fuel mist or spray is emitted into the rear equipment bay.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a one-time detailed visual inspection within 75 days after the effective date to detect overheating, degradation, proper routing, and 0.5-inch clearance between the hose assembly and hot surfaces. Correct discrepancies by replacing the hose assembly, re-routing, or adjusting clearance as needed. Modify the fuel feed hose of the APU prior to accumulating 200 flight hours after the effective date, following specified service bulletins.
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Compliance Time
Within 75 days after the effective date of this AD for the inspection; prior to the accumulation of 200 flight hours after the effective date for the modification.
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Affected Aircraft
Raytheon Model BAe 125-800A series airplanes (including military variants C-29A and U-125) and Hawker 800 series airplanes, constructor's numbers 8091 and subsequent, equipped with Turbomach APU (Modification 259404B).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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