AD 2017-11-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Cracking in the horizontal stabilizer rear spar upper caps, specifically at station XE ± 5.931, which could affect structural integrity.
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Required Actions
Conduct repetitive open hole eddy current high frequency (ETHF) or surface eddy current low frequency (ETLF) inspections for any crack in the left and right side horizontal stabilizer rear spar upper caps. Repair or replace the spar caps if cracks are found.
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Compliance Time
Within the compliance times specified in Boeing Alert Service Bulletin MD90-55A018, Table 1 for the left side and Table 2 for the right side.
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Affected Aircraft
The Boeing Company 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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