AD 2017-02-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Intergranular cracks on the front spar chord lugs of the outboard horizontal stabilizer could cause stabilizer instability, adversely affect controllability of the airplane, and adversely affect the structural integrity of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Repetitive inspections of the front spar chord lugs and lug bores of the horizontal stabilizer are required, with repair if necessary.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 27 months after the effective date of the AD for replacement horizontal stabilizers; compliance times are measured in months for all horizontal stabilizers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
The Boeing Company Model 737-300, -400, and -500 series airplanes, certificated in any category. Installation of Supplemental Type Certificate (STC) ST01219SE does not affect the applicability of this AD.
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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