AD 2011-08-51

Recurring final rule
Data completeness: 70%

Airworthiness Directives; The Boeing Company Model 737-300, -400, and -500 Series Airplanes

AD Number
2011-08-51
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. FAA-2011-0348
FR Citation
76 FR 28632

Applicability

TypeManufacturerModelDetails
aircraft Boeing Company Model 737-300 Airworthiness Directives; The Boeing Company Model 737-300, -400, and -500 Series Airplanes

Unsafe Condition

Cracking in the lower skin at the lower row of fasteners of the lap joints at stringers S-4R and S-4L, along the entire length from body station (BS) 360 to BS 908, could open up and result in an uncontrolled decompression of the airplane.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Repetitive external eddy current inspections of the lap joints at stringers S-4R and S-4L, along the entire length from BS 360 to BS 908. If a crack indication is found, either confirm the crack by doing internal eddy current inspections or repair the crack. As an alternative, internal eddy current and detailed inspections for cracks in the lower skin at the lower row of fasteners at stringers S-4L and S-4R are also acceptable.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Before further flight

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

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

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.

View Official Source ↗ Find More ADs for Boeing Company Model 737-300

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