AD 2012-13-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Corrosion of the carriage spindle, if not detected and corrected, could result in fracture of the spindle. Fracture of both the inboard and outboard carriage spindles, at the forward ends through the large diameters, on a single flap, could adversely affect the continued safe flight and landing of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect parts or review maintenance records to determine if a carriage with HVOF thermal coating is installed at wing butt line (WBL) 254 or WBL 355. For suspect carriages, perform repetitive detailed inspections for corrosion, missing, or flaking thermal coating on the forward end of the carriage spindle at the root, and take related investigative and corrective actions if necessary. Investigate corrosion inhibiting compound (CIC) coverage on the lower surface of the spindle at the root. Corrective actions include applying or reapplying CIC and replacing the suspect carriage with a new or serviceable carriage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours after the effective date of the AD.
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Affected Aircraft
The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series 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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