Airworthiness directives › 2013-24-10
AD 2013-24-10 Airworthiness Directives; The Boeing Company Airplanes
Models named: 757-200, -200PF, -200CB, -300 series, 767-200, -300, -300F, -400ER series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to The Boeing Company airplanes, certificated in any category, identified in paragraphs (c)(1) and (c)(2) of this AD. (1) Model 757-200, -200PF, -200CB, and -300 series airplanes, as identified in Boeing Special Attention Service Bulletin 757-24-0132, Revision 1, dated June 19, 2012. (2) Model 767-200, -300, -300F, and -400ER series airplanes, as identified in Boeing Special Attention Service Bulletin 767-24-0200, Revision 1, dated September 13, 2012. (3) Installation of Supplemental Type Certificate (STC) ST01920SE ( http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/082838ee177dbf62862576a4005cdfc0/$FILE/ST01920SE.pdf ) or STC ST01518SE ( http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/48e13cdfbbc32cf4862576a4005d308b/$FILE/ST01518SE.pdf ) does not affect the ability to accomplish the actions required by this AD. Therefore, for airplanes on which STC ST01920SE or STC ST01518SE is installed, a ”change in product” alternative method of compliance (AMOC) approval request is not necessary to comply with the requirements of 14 CFR 39.17.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 60 months after the effective date of this AD: Do wiring changes and install a new air/ground relay to the battery charger system, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 757-24-0132, Revision 1, dated June 19, 2012; or Boeing Special Attention Service Bulletin 767-24-0200, Revision 1, dated September 13, 2012; as applicable.
Unsafe condition
This AD was prompted by a standby power relay failure and subsequent illumination of the “STANDBY BUS OFF” light, which led the flightcrew to set the standby power switch to the “BAT” position, isolating the battery and standby buses, disabling the battery charger, and eventually causing the main battery to be depleted. We are issuing this AD to prevent discharge of the main battery, which could result in multiple system degradation, reduced airplane controllability, and runway excursion upon landing.
Affected ADs
None.
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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