AD 99-07-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-81 (MD-81) | Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes, and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-82 (MD-82) | Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes, and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-83 (MD-83) | Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes, and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-87 (MD-87) | Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes, and Model MD-88 Airplanes |
| aircraft | The Boeing Company | MD-88 | Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes, and Model MD-88 Airplanes |
Unsafe Condition
Corrosion of the lug bores and the surface of the hinge plates of the vertical-to-horizontal stabilizer, apparently due to improper brushing of cadmium on the hinge plates during manufacture.
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Required Actions
Perform a one-time visual inspection within 18 months after the effective date to detect corrosion of the lug bores and surface of the hinge plates. If corrosion within limits is found, remove it prior to further flight. If corrosion exceeds limits, replace the hinge plates with new parts prior to further flight.
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Compliance Time
Within 18 months after the effective date
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Affected Aircraft
McDonnell Douglas Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87) series, and Model MD-88 airplanes, as listed in Service Bulletin MD80-55-054.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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