AD 81-25-04 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-25 | Airworthiness Directives; Mitsubishi Model MU-2B-25/-26/-26A/-40 and MU-2B-35/-36A/-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-26 | Airworthiness Directives; Mitsubishi Model MU-2B-25/-26/-26A/-40 and MU-2B-35/-36A/-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-26A | Airworthiness Directives; Mitsubishi Model MU-2B-25/-26/-26A/-40 and MU-2B-35/-36A/-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-35 | Airworthiness Directives; Mitsubishi Model MU-2B-25/-26/-26A/-40 and MU-2B-35/-36A/-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-36A | Airworthiness Directives; Mitsubishi Model MU-2B-25/-26/-26A/-40 and MU-2B-35/-36A/-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-40 | Airworthiness Directives; Mitsubishi Model MU-2B-25/-26/-26A/-40 and MU-2B-35/-36A/-60 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-60 | Airworthiness Directives; Mitsubishi Model MU-2B-25/-26/-26A/-40 and MU-2B-35/-36A/-60 Series Airplanes |
Unsafe Condition
Nonshielded and noncolor coded white or brown (tan) engine electrical wiring with loose weave or specific insulation (MS 25471-XX) may have tight loops, kinks, or bulged deformations, leading to potential electrical failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 25 hours' time in service from the effective date, visually inspect engine wiring at connectors P4001 and P4020. Depending on wire color and weave, further inspections or replacements may be required. After each subsequent 25 hours, inspect affected wires for deformations and replace harnesses if issues are found. Before 300 hours' time in service, replace all loose weave brown or white MS 25471-XX wires with M 22759/8-XX wire using specified service bulletin or approved method.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 25 hours' time in service from the effective date of this AD
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Affected Aircraft
Mitsubishi Heavy Industries, Ltd. Models MU-2B-25/-26/-26A/-40 (serial numbers 313SA, 321SA, 348SA through 453SA), MU-2B-35/-36A/-60 (serial numbers 652SA, 661SA, 697SA through 799SA, 1501SA through 1538SA, and 1540SA)
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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