AD 2016-13-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Omission of the required protective finish on certain bushings installed in the rear spar upper chord on horizontal stabilizers could lead to galvanic corrosion and consequent cracking of the rear spar upper chord, resulting in failure of the upper chord and departure of the horizontal stabilizer from the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect or perform a records check to determine if affected horizontal stabilizers are installed. For affected stabilizers, conduct repetitive inspections for cracks in the horizontal stabilizer rear spar upper chord and take corrective action if necessary.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight for initial inspection; repetitive inspections at intervals specified in service information.
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Affected Aircraft
The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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