AD Amdt-39-13400
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | McDonnell Douglas | MD-90-30 | Airworthiness Directives; McDonnell Douglas Model MD-90-30 Airplanes |
Unsafe Condition
Lanyards of inadequate strength could allow the pressure relief door to detach from the thrust reverser in the event that an engine bleed air duct bursts, which could result in the detached door striking and damaging the horizontal stabilizer, and consequent reduced controllability of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the lanyards on the pressure relief door for the thrust reverser with new, improved lanyards, and accomplish associated modifications per Boeing Service Bulletin MD90-78-048. Remove the pressure relief door, modify it (including replacing brackets and re-identifying the door), modify the lower track beam (including removing terminals, replacing the aft quick-release pin, and re-identifying the beam), modify the heat shield on the lanyard assembly attach lugs, and re-install the pressure relief door.
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Compliance Time
Within 18 months after the effective date of the AD.
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Affected Aircraft
All McDonnell Douglas Model MD-90-30 airplanes, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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