AD 97-04-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B | Airworthiness Directives; Mitsubishi Heavy Industries, Ltd., MU-2B Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-10 | Airworthiness Directives; Mitsubishi Heavy Industries, Ltd., MU-2B Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-15 | Airworthiness Directives; Mitsubishi Heavy Industries, Ltd., MU-2B Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-20 | Airworthiness Directives; Mitsubishi Heavy Industries, Ltd., MU-2B Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-30 | Airworthiness Directives; Mitsubishi Heavy Industries, Ltd., MU-2B Series Airplanes |
Unsafe Condition
The inability of both engines to utilize the entire fuel supply because of the outboard fuel not transferring to the center tank, which could result in an uncommanded engine shutdown.
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Required Actions
Remove the vent check valve assembly in accordance with Mitsubishi MU-2 Service Bulletin No. 130A, dated July 19, 1971. Special flight permits may be issued to operate the airplane to a location where the requirements can be accomplished.
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Compliance Time
within the next 60 calendar days after the effective date of this AD
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Affected Aircraft
Mitsubishi Heavy Industries, Ltd. models MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, and MU-2B-30 airplanes (serial numbers 004 through 035, 037, 038, 101 through 230, 502 through 525, and 527 through 547)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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