AD 2004-07-05

Recurring final rule
Data completeness: 70%

Airworthiness Directives; McDonnell Douglas Model DC-9-10, DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

AD Number
2004-07-05
Status
final_rule
Effective Date
Product Category
engine
Docket
Docket No. 99-NM-255-AD
FR Citation
69 FR 16788

Applicability

TypeManufacturerModelDetails
aircraft McDonnell Douglas DC-9-10 Airworthiness Directives; McDonnell Douglas Model DC-9-10, DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

Unsafe Condition

Fatigue cracking of the engine pylon aft upper spar straps (caps), which could result in major damage to the adjacent structure 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 new, improved repetitive ultrasonic inspections of the engine pylon aft upper spar straps. Replace the strap with a new one or modify the engine pylon rear spar straps if cracking is detected. Implement a terminating action for the repetitive inspection requirements.

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

Affected Aircraft

McDonnell Douglas Model DC-9-10, DC-9-20, DC-9-30, DC-9-40, and DC-9-50 series airplanes, and C-9 (military) 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

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View Official Source ↗ Find More ADs for McDonnell Douglas DC-9-10

Related Airworthiness Directives

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Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-10 Series Airplanes, DC-9-30 Series Airplanes, DC-9-81 (MD-81) Airplanes, DC-9-82 (MD-82) Airplanes, DC-9-83 (MD-83) Airplanes, DC-9-87 (MD-87) Airplanes, MD-88 Airplanes, and MD-90-30 Airplanes

Unsafe Condition: which could jeopardize flight safety.

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2008-18-06

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2007-17-18 Recurring

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Airworthiness Directives; McDonnell Douglas Model DC-9-10, -20, -30, -40, and -50 Series Airplanes; Model DC-9-81 (MD-81), -82 (MD-82), -83 (MD-83), and -87 (MD-87) Airplanes; and Model MD-88 Airplanes

Unsafe Condition: unsafe condition.

Effective: Oct 2, 2007 Category: aircraft

2006-21-06

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Airworthiness Directives; McDonnell Douglas Model DC-9-10 Series Airplanes; DC-9-20 Series Airplanes; DC-9-30 Series Airplanes; DC-9-40 Series Airplanes; and DC-9-50 Series Airplanes

Unsafe Condition: The FAA is superseding an existing airworthiness directive (AD), which applies to certain McDonnell Douglas transport category airplanes. That AD currently requires, among other things, revision of...

Effective: Nov 29, 2006 Category: aircraft

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