AD 91-23-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-10 | MITSUBISHI HEAVY INDUSTRIES Models MU-2B-10, MU-2B-15, and MU-2B-20 airplanes (serial numbers (S/N) 008 through 211), Model MU-2B-30 airplanes (S/N 502 through 542), and Model MU-2B-36 airplanes (S/N 501), certificated in any category. |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-15 | MITSUBISHI HEAVY INDUSTRIES Models MU-2B-10, MU-2B-15, and MU-2B-20 airplanes (serial numbers (S/N) 008 through 211), Model MU-2B-30 airplanes (S/N 502 through 542), and Model MU-2B-36 airplanes (S/N 501), certificated in any category. |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-20 | MITSUBISHI HEAVY INDUSTRIES Models MU-2B-10, MU-2B-15, and MU-2B-20 airplanes (serial numbers (S/N) 008 through 211), Model MU-2B-30 airplanes (S/N 502 through 542), and Model MU-2B-36 airplanes (S/N 501), certificated in any category. |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-30 | MITSUBISHI HEAVY INDUSTRIES Models MU-2B-10, MU-2B-15, and MU-2B-20 airplanes (serial numbers (S/N) 008 through 211), Model MU-2B-30 airplanes (S/N 502 through 542), and Model MU-2B-36 airplanes (S/N 501), certificated in any category. |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-36 | MITSUBISHI HEAVY INDUSTRIES Models MU-2B-10, MU-2B-15, and MU-2B-20 airplanes (serial numbers (S/N) 008 through 211), Model MU-2B-30 airplanes (S/N 502 through 542), and Model MU-2B-36 airplanes (S/N 501), certificated in any category. |
Unsafe Condition
Interference between the rudder and the rudder trim tab that could result in loss of control of the airplane.
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Required Actions
Modify the rudder trim tab in accordance with Mitsubishi Heavy Industries Service Bulletin No. 211, dated November 20, 1990. Special flight permits may be issued under FAR 21.197 and 21.199 to operate the airplane to a location where the AD requirements can be accomplished.
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Compliance Time
within the next 200 hours time-in-service after the effective date of this AD
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Affected Aircraft
Models MU-2B-10, MU-2B-15, MU-2B-20 (S/N 008-211), MU-2B-30 (S/N 502-542), and MU-2B-36 (S/N 501)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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