AD 87-04-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-26, MU-2B-26A, MU-2B-30, MU-2B-35, MU-2B- 36, MU-2B-36A, MU-2B-40, MU-2B-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-10 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-26, MU-2B-26A, MU-2B-30, MU-2B-35, MU-2B- 36, MU-2B-36A, MU-2B-40, MU-2B-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-15 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-26, MU-2B-26A, MU-2B-30, MU-2B-35, MU-2B- 36, MU-2B-36A, MU-2B-40, MU-2B-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-20 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-26, MU-2B-26A, MU-2B-30, MU-2B-35, MU-2B- 36, MU-2B-36A, MU-2B-40, MU-2B-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-25 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-26, MU-2B-26A, MU-2B-30, MU-2B-35, MU-2B- 36, MU-2B-36A, MU-2B-40, MU-2B-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-26 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-26, MU-2B-26A, MU-2B-30, MU-2B-35, MU-2B- 36, MU-2B-36A, MU-2B-40, MU-2B-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-26A | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-26, MU-2B-26A, MU-2B-30, MU-2B-35, MU-2B- 36, MU-2B-36A, MU-2B-40, MU-2B-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-30 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-26, MU-2B-26A, MU-2B-30, MU-2B-35, MU-2B- 36, MU-2B-36A, MU-2B-40, MU-2B-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-35 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-26, MU-2B-26A, MU-2B-30, MU-2B-35, MU-2B- 36, MU-2B-36A, MU-2B-40, MU-2B-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-36 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-26, MU-2B-26A, MU-2B-30, MU-2B-35, MU-2B- 36, MU-2B-36A, MU-2B-40, MU-2B-60 Series Airplanes |
Unsafe Condition
Failure of flap flexible shafts Part Numbers RY25-1, 8022Y-OC-97.00, 8022Y-OC-97.50, or 035A-961001-3 could lead to potential differential flap operation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect flap flexible shaft torque values and seal connections per specified service bulletins. Replace shafts with approved parts if torque exceeds 1.2 in-lbs (1.4 kg-cm). Remove and do not reinstall clamp at W.S. 2590, ensuring shaft bend radius is not less than 8.7 inches (220 mm) between W.S. 2370 and 2910.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 hours of time-in-service (TIS) or before further flight if torque exceeds limits.
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Affected Aircraft
Mitsubishi Heavy Industries, Ltd. Models MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-26, MU-2B-26A, MU-2B-30, MU-2B-35, MU-2B-36, MU-2B-36A, MU-2B-40, MU-2B-60 with serial numbers 008-457, 501-799, 1501-1566 (with or without 'SA' suffix).
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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