AD Amdt-39-11428

final rule
Data completeness: 70%

Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes

AD Number
Amdt-39-11428
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. 99-NM-05-AD
FR Citation
64 FR 63187

Applicability

TypeManufacturerModelDetails
aircraft McDonnell Douglas DC-9-80 Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes

Unsafe Condition

Failure of certain Hi-Lok pin fasteners of the aft pressure bulkhead tee due to installation of non-self-aligning nuts, which could result in gouging of the aft pressure bulkhead tee, fatigue cracking, and reduced structural integrity.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Conduct a one-time visual inspection to determine whether self-aligning nuts are installed at certain locations of the aft pressure bulkhead tee. Take corrective actions, if necessary, to replace non-self-aligning nuts with self-aligning nuts.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Before further flight

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

McDonnell Douglas Model DC-9-80 series airplanes and Model MD-88 airplanes.

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 6, 2026

Rights: U.S. Government Public Domain

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.

View Official Source ↗ Find More ADs for McDonnell Douglas DC-9-80

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