AD Amdt-39-10976

Recurring final rule
Data completeness: 70%

Airworthiness Directives; Boeing Model 747 Series Airplanes

AD Number
Amdt-39-10976
Status
final_rule
Effective Date
Product Category
engine
Docket
Docket No. 98-NM-327-AD
FR Citation
63 FR 72143

Applicability

TypeManufacturerModelDetails
aircraft Boeing 747 Airworthiness Directives; Boeing Model 747 Series Airplanes

Unsafe Condition

Fatigue or stress corrosion cracking in new areas of the diagonal brace, which could result in failure of the strut and consequent separation of the engine from the airplane.

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

Required Actions

Repetitively inspect the root radius of the clevis of the diagonal brace of the engine strut. For certain airplanes, add new repetitive inspections of the diagonal brace lugs and reduce intervals for previously required inspections. Inspections must be conducted in accordance with the specified service bulletin or alert service bulletin.

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

Compliance Time

Within the intervals specified in the referenced service bulletin or alert service bulletin.

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

Affected Aircraft

Boeing Model 747 series airplanes, as specified in the referenced service bulletin or alert service bulletin.

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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