AD 2004-22-27
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 737-600 | Airworthiness Directives; Boeing Model 737-600, -700, -700C, -800, and -900 Series Airplanes |
Unsafe Condition
Flammable fluid in the upper or rear pylon areas may leak past unsealed areas and onto a hot engine nozzle, which could result in ignition of the fluid, causing an undetected and uncontrollable fire to spread into the engine struts.
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Required Actions
Perform a general visual inspection for sealant at the interface of the diagonal brace fitting and the aft bulkhead and at the four bolts common to the interface. Apply fillet seal if the seal is not continuous and there is no evidence of fay seal squeeze out. Cap seal the four bolts if they do not have evidence of sealant squeeze out and no cap seal exists.
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Compliance Time
Within 18 months or 3,500 flight cycles after the effective date, whichever occurs first.
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Affected Aircraft
Boeing Model 737-600, -700, -700C, -800, and -900 series airplanes, line numbers 1 through 946 inclusive, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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