AD 88-21-01 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, -15, -20, -25, -26, -26A, -30, -35, -36, -36A, - 40, and -60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-10 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, -15, -20, -25, -26, -26A, -30, -35, -36, -36A, - 40, and -60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-15 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, -15, -20, -25, -26, -26A, -30, -35, -36, -36A, - 40, and -60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-20 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, -15, -20, -25, -26, -26A, -30, -35, -36, -36A, - 40, and -60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-25 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, -15, -20, -25, -26, -26A, -30, -35, -36, -36A, - 40, and -60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-26 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, -15, -20, -25, -26, -26A, -30, -35, -36, -36A, - 40, and -60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-26A | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, -15, -20, -25, -26, -26A, -30, -35, -36, -36A, - 40, and -60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-30 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, -15, -20, -25, -26, -26A, -30, -35, -36, -36A, - 40, and -60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-35 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, -15, -20, -25, -26, -26A, -30, -35, -36, -36A, - 40, and -60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-36 | Airworthiness Directives; Mitsubishi Model MU-2B, MU-2B-10, -15, -20, -25, -26, -26A, -30, -35, -36, -36A, - 40, and -60 Series Airplanes |
Unsafe Condition
The possibility of confusion in autopilot/manual electric pitch trim disconnect/interrupt switch location and function could lead to unintended disengagement or failure to disengage systems, compromising flight control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the control yoke per specified manufacturer's documentation, perform visual configuration checks and system functional ground tests, and enter maintenance records. Ensure the disconnect button is red, properly labeled, and unambiguous in function and location.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 200 flight hours or five (5) calendar months, whichever occurs first, unless already accomplished per the original version of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Mitsubishi Model MU-2B, MU-2B-10, -15, -20, -25, -26, -26A, -30, -35, -36, -36A, -40, and -60 (all serial numbers, with or without the SA suffix) airplanes equipped with any manual electric pitch trim system and/or any autopilot other than Bendix.
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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