AD 96-25-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-10 | Airworthiness Directives; Mitsubishi Heavy Industries, LTD. Models MU-2B-10, 15, -20, -25, -26, -26A, -30, -35, -36, -36A, -40, and -60 Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-15 | Airworthiness Directives; Mitsubishi Heavy Industries, LTD. Models MU-2B-10, 15, -20, -25, -26, -26A, -30, -35, -36, -36A, -40, and -60 Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-20 | Airworthiness Directives; Mitsubishi Heavy Industries, LTD. Models MU-2B-10, 15, -20, -25, -26, -26A, -30, -35, -36, -36A, -40, and -60 Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-25 | Airworthiness Directives; Mitsubishi Heavy Industries, LTD. Models MU-2B-10, 15, -20, -25, -26, -26A, -30, -35, -36, -36A, -40, and -60 Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-26 | Airworthiness Directives; Mitsubishi Heavy Industries, LTD. Models MU-2B-10, 15, -20, -25, -26, -26A, -30, -35, -36, -36A, -40, and -60 Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-26A | Airworthiness Directives; Mitsubishi Heavy Industries, LTD. Models MU-2B-10, 15, -20, -25, -26, -26A, -30, -35, -36, -36A, -40, and -60 Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-30 | Airworthiness Directives; Mitsubishi Heavy Industries, LTD. Models MU-2B-10, 15, -20, -25, -26, -26A, -30, -35, -36, -36A, -40, and -60 Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-35 | Airworthiness Directives; Mitsubishi Heavy Industries, LTD. Models MU-2B-10, 15, -20, -25, -26, -26A, -30, -35, -36, -36A, -40, and -60 Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-36 | Airworthiness Directives; Mitsubishi Heavy Industries, LTD. Models MU-2B-10, 15, -20, -25, -26, -26A, -30, -35, -36, -36A, -40, and -60 Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-36A | Airworthiness Directives; Mitsubishi Heavy Industries, LTD. Models MU-2B-10, 15, -20, -25, -26, -26A, -30, -35, -36, -36A, -40, and -60 Airplanes |
Unsafe Condition
Operating in icing conditions beyond the capability of the icing protection system can cause ice build-up on protected surfaces and ice forming aft of protected surfaces, leading to increased drag, angle of attack, aerodynamic flow separation, and uncontrollable rolling and pitching. This may result in aerodynamic stall at higher than normal airspeed without artificial stall warning, potentially causing a spin or near vertical spiral which may not be recoverable.
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Required Actions
Revise the AFM's Limitations Section to establish a minimum airspeed of 180 knots IAS for sustained level flight in icing conditions, prohibit sustained flight with flaps extended except for approach and landing, and include warnings about severe icing risks. Also, ensure wing illumination and taxi lights are operable before night flights into icing conditions.
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Compliance Time
within the next 24 hours time-in-service (TIS) after the effective date of this AD
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Affected Aircraft
Mitsubishi Heavy Industries, Ltd. Models MU-2B-10, -15, -20, -25, -26, -26A, -30, -35, -36, -36A, -40, and -60 airplanes (all serial numbers)
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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