AD 93-21-08

final rule
Data completeness: 70%

Airworthiness Directives; MCDONNELL DOUGLAS DC-8-72, -72F, -73, and -73F Series Airplanes

AD Number
93-21-08
Status
final_rule
Effective Date
Product Category
aircraft
Docket
93-NM-66-AD
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft The Boeing Company DC-8-72 Airworthiness Directives; MCDONNELL DOUGLAS DC-8-72, -72F, -73, and -73F Series Airplanes
aircraft The Boeing Company DC-8-72F Airworthiness Directives; MCDONNELL DOUGLAS DC-8-72, -72F, -73, and -73F Series Airplanes
aircraft The Boeing Company DC-8-73 Airworthiness Directives; MCDONNELL DOUGLAS DC-8-72, -72F, -73, and -73F Series Airplanes
aircraft The Boeing Company DC-8-73F Airworthiness Directives; MCDONNELL DOUGLAS DC-8-72, -72F, -73, and -73F Series Airplanes

Unsafe Condition

Reduced structural integrity of the pylon-to-wing main load path due to potential cracking in the front spar pylon support fittings (part numbers 5753054-501 and -502).

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Required Actions

Perform an eddy current inspection of the front spar pylon support fittings on number 2 and 3 engines per Alert Service Bulletin A57-99. Repeat inspections at intervals not exceeding 720 landings. If cracks are found, repair them prior to further flight per approved method.

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Compliance Time

Prior to the accumulation of 4,000 landings since installation of the engine, or within 6 months after December 13, 1993, whichever occurs later (unless previously accomplished within the last 720 landings before the effective date).

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Affected Aircraft

McDonnell Douglas DC-8-72, -72F, -73, and -73F series airplanes listed in Alert Service Bulletin A57-99 dated December 10, 1992.

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Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

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