AD 99-06-13

final rule
Data completeness: 70%

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

AD Number
99-06-13
Status
final_rule
Effective Date
Product Category
aircraft
Docket
97-NM-292-AD
FR Citation
(Federal Register: March 18, 1999 (Volume 64, Number 52))

Applicability

TypeManufacturerModelDetails
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

Fatigue cracking and subsequent fracturing of the main landing gear (MLG) shock strut cylinder.

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Required Actions

Perform repetitive inspections using dye penetrant and magnetic particle methods to detect fatigue cracking of the MLG shock strut cylinder. Replace any cracked shock strut cylinder with a serviceable part. Install brake line hydraulic restrictors on the MLG brake systems to terminate repetitive inspections if accomplished.

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Compliance Time

Within specified intervals following installation of brake line hydraulic restrictors, with inspections required at intervals not exceeding 1,200 landings until a minimum of 4,800 landings has accumulated since restrictor installation.

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Affected Aircraft

McDonnell Douglas Model DC-9-80 series (DC-9-81/MD-81, DC-9-82/MD-82, DC-9-83/MD-83, DC-9-87/MD-87) and Model MD-88 airplanes listed in Alert Service Bulletin MD80-32A286.

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

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View Official Source ↗ Find More ADs for The Boeing Company DC-9-81 (MD-81)

Related Airworthiness Directives

2004-05-03

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

Unsafe Condition: Shock strut cylinders

Effective: Mar 15, 2004 Category: aircraft

2000-15-17 R1

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); Model MD-88 Airplanes; and Model MD-90-30 Series Airplanes

Unsafe Condition: Hydraulic Pipe Assembly in the Aft Fuselage

Effective: Sep 12, 2000 Category: aircraft

99-24-04 C1

final rule

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

Unsafe Condition: Hi-Lok Pin Fasteners

Effective: Dec 27, 1999 Category: aircraft

99-21-06

final rule

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

Unsafe Condition: Slat Drive Mechanism Assembly Brackets

Effective: Nov 12, 1999 Category: aircraft

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