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Airworthiness Directive

AD 97-04-13 62 FR 7339 Active

Federal Aviation Administration · 14 CFR part 39

Requires removing the vent check valve assembly from the bulkhead between the fuel tanks.

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FR document
97-3960
Amendment
39-9938
Published
1997-02-19
Effective
1997-04-16
Models covered
1

Last live check: 2026-08-19

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AD

97-04-13

FR doc 97-3960 · 62 FR 7339

AD 97-04-13Published 1997-02-19Effective 1997-04-16

FAA rule - 14 CFR 39

FAA rule. Compliance with an applicable AD is required under 14 CFR 39.7. Check its effective date, applicability, compliance times and current status.

Requires removing the vent check valve assembly from the bulkhead between the fuel tanks.

Full official abstract

This amendment adopts a new airworthiness directive (AD) that applies to Mitsubishi Heavy Industries, Ltd., (Mitsubishi) MU-2B series airplanes. This AD requires removing the vent check valve assembly from the bulkhead between the fuel tanks. This AD results from an incident where both engines on an affected airplane failed near the end of a flight because of lack of fuel to the engines. The incident is attributed to the fuel filler caps on the top of the wings not sealing correctly. The actions specified by this AD are intended to prevent 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.

More directives for Mitsubishi MU-2

  1. AD 2020-26-14 Airworthiness Directives; Mitsubishi Heavy Industries, Ltd. Airplanes Effective 2021-02-02
  2. AD 2016-08-19 Airworthiness Directives; Mitsubishi Heavy Industries, Ltd. Airplanes Effective 2016-06-06
  3. AD 2015-01-02 Airworthiness Directives; Mitsubishi Heavy Industries, Ltd. Airplanes Effective 2015-02-26
  4. AD 2010-10-17 Airworthiness Directives; Mitsubishi Heavy Industries, Ltd. Various Mode... Effective 2010-07-22
  5. AD 2007-17-09 Airworthiness Directives; Mitsubishi Heavy Industries MU-2B Series Airpl... Effective 2007-09-25

All Mitsubishi MU-2 directives

View on Federal Register (opens in a new tab) View this AD in FAA DRS (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 1 model in our index