AD 92-15-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 400 | Airworthiness Directives; BEECH AIRCRAFT CORPORATION Model 400, MU-300 and MU-300-10 Airplanes |
| aircraft | Textron Aviation Inc. | MU-300 | Airworthiness Directives; BEECH AIRCRAFT CORPORATION Model 400, MU-300 and MU-300-10 Airplanes |
| aircraft | Textron Aviation Inc. | MU-300-10 | Airworthiness Directives; BEECH AIRCRAFT CORPORATION Model 400, MU-300 and MU-300-10 Airplanes |
Unsafe Condition
Reduced structural integrity of the engine mounting system due to potential failure of engine mount nuts and bolts not inspected using magnetic particle techniques with green dye.
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Required Actions
Replace each engine mount nut and bolt with inspected nuts and bolts (using magnetic particle techniques with green dye) per applicable service bulletin. Submit requests for alternative methods of compliance through an FAA Principal Maintenance Inspector. Use special flight permits under FAR 21.197/21.199 to operate to a location where AD requirements can be met.
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Compliance Time
Within 200 hours time-in-service after August 18, 1992, or at the next scheduled inspection interval, whichever occurs first.
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Affected Aircraft
Beech Model 400 (serial numbers RJ-1 through RJ-65), Mitsubishi Model MU-300 (A003SA through A091SA), and MU-300-10 (A1001SA through A1011SA).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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