Airworthiness directives › 2018-09-12
AD 2018-09-12 Airworthiness Directives; The Boeing Company Airplanes
Models named: 747-200B, 747-300, 747-400 series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to The Boeing Company Model 747-200B, 747-300, and 747-400 series airplanes, certificated in any category, as identified in Boeing Special Attention Service Bulletin 747-35-2134, dated November 22, 2017.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Except as required by paragraph (h) of this AD: At the applicable times specified in paragraph 1.E., “Compliance,” of Boeing Special Attention Service Bulletin 747-35-2134, dated November 22, 2017, do all applicable actions identified as “RC” (required for compliance) in, and in accordance with, the Accomplishment Instructions of Boeing Special Attention Service Bulletin 747-35-2134, dated November 22, 2017.
Unsafe condition
This AD was prompted by reports of low-pressure flex-hoses of the flightcrew oxygen system that burned through due to inadvertent electrical current from a short circuit. We are issuing this AD to prevent electrical current from passing through the low-pressure oxygen flex-hoses in the gaseous passenger oxygen system, which can cause the flex-hoses to melt or burn, and a consequent oxygen-fed fire in the passenger cabin.
Affected ADs
None.
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1