AD 99-24-04 C1

final rule
Data completeness: 70%

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

AD Number
99-24-04 C1
Status
final_rule
Effective Date
Product Category
aircraft
Docket
99-NM-05-AD
FR Citation
(Federal Register: December 27, 1999 (Volume 64, Number 247))

Applicability

TypeManufacturerModelDetails
aircraft The Boeing Company DC-9-81 (MD-81) (Correction) Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes
aircraft The Boeing Company DC-9-82 (MD-82) (Correction) Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes
aircraft The Boeing Company DC-9-83 (MD-83) (Correction) Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes
aircraft The Boeing Company DC-9-87 (MD-87) (Correction) Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes
aircraft The Boeing Company MD-88 (Correction) 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 fatigue cracking and reduced structural integrity of the airplane.

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 if self-aligning nuts are installed at specified locations of the aft pressure bulkhead tee. Take corrective actions if non-self-aligning nuts are found, per revised service bulletin references.

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Compliance Time

Before further flight

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Affected Aircraft

McDonnell Douglas Model DC-9-80 series (DC-9-81, -82, -83, -87) 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 8, 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 The Boeing Company DC-9-81 (MD-81)

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final rule

Airworthiness Directives; McDonnell Douglas Model DC-9-81 (MD- 81), DC-9-82 (MD-82), DC-9-83 (MD-83), and DC-9-87 (MD-87) Airplanes; Model MD-88 Airplanes; and Model MD-90-30 Airplanes

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2000-15-17 R1

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99-21-06

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Airworthiness Directives; McDonnell Douglas Model DC-9-81, -82, -83, and -87 Series Airplanes (MD-81, -82, -83, and -87), and Model MD-88 Airplanes

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Effective: Nov 12, 1999 Category: aircraft

99-07-14

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

Unsafe Condition: Vertical-To-Horizontal Stabilizer

Effective: May 6, 1999 Category: aircraft

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