[4910-13-U]

DEPARTMENT OFTRANSPORTATION 'ONCURIlf.NCFS OUTING SYMIlOL Federal Aviation Administration

ACTION: Supplemental notice ofproposed rulemaking; reopening ofcomment period. 14CFR Part 39 [Docket No. 2002-NM-12-AD] RIN 2120-AA64 Airworthiness Directives; Boeing Model 737-300,'-400, -500, -600, -700, -700C, -800, and -900, and 747-400 Series Airplanes; and Model 757, 767, and 777 Airplanes AGENCY: Federal Aviation Administration, DOT. 

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ounNGSYMllOL inverter byreplacing resistor R170with anew resistor and relocating the new resistor. NGSYMltOl rulemaking (NPRM), applicable tocertain Boeing Model 737-300, -400, -500, -600, 

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No. 2002-NM-12-AD, 1601 Lind Avenue SW., Renton, Washington 98057-3356. ADDRESSES: Submit comments intriplicate to the Federal Aviation Administration the Federal Register]. DATES: Comments must bereceived by [insert date 25 days after date ofpublication i 'on'"""G This new action revises the first supplemental NPRM by adding certain airplanes tothe

identified unsafe condition.
(FAA), Transport Airplane Directorate, ANM-114, Attention: Rules Docket and loss ofthe electrical standby power system. This action is intended toaddress the static inverter from overheating, which could result insmoke inthe flight deck and cabi actions specified bythis second supplemental NPRM are intended toprevent astandby applicability, changing certain airplane groups, and adding certain part numbers. The

Comments may be inspected atthis location between 9:00 a.m. and 3:00 p.m., Monday

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modifying the static inverter by relocating resistor RI70 ofthe static inverter bridge (AD) that is applicable to certain Boeing Model 737-300, -400, -500, -600, -700, -700 -800, -900; 747-400; 757; 767; and 777 series airplanes. This proposal would require AGENCY: Federal Aviation Administration, DOT. [4910-13-U] DEPARTMENT OFTRANSPORTATION

ACTION: Notice ofproposed rulemaking (NPRM). 14CFR Part 39 Federal Aviation Administration [Docket No. 2002-NM-12-AD] RIN 2120-AA64

SUMMARY: This document proposes the adoption ofa new airworthiness directive Airworthiness Directives; Boeing Model 737-300, -400, -500, -600, -700, -700C, -800 "m -900; 747-400; 757; 767; and 777 Series Airplanes

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ROUTING SYloleol. Comments may beinspected atthis location between 9:00 a.m. and 3:00 p.m., Monda assembly. This action isnecessary toprevent astandby static inverter from overheati which could result in smoke inthe flight deck and cabin and loss ofthe electrical stan

INmA GNATU DATES: Comments must bereceived by [insert date 45 days after date ofpublication in power system. This action is intended to address the identified unsafe condition. the Federal Register]. ADDRESSES: Submit comments intriplicate tothe Federal Aviation Administration (FAA), Transport Airplane Directorate, ANM-114, Attention: Rules Docket No. 2002-NM-12-AD, 1601 Lind Avenue, SW., Renton, Washington 98055-4056. through Friday, except Federal holidays. Comments may be submitted via faxto (425) 227-1232. Comments may also be sent viathe Internet using the following address: 9-anm-nprmcomment@faa.gov. Comments sent via fax orthe Intemet must contain "Docket No. 2002-NM-12-AD" inthe subject line and need notbe submitted in FAA Form 1360-14.1 (6.89) OFFICIAL FILE COPY ~ u.s. GOVERNMENT FAINTING OFfiCE: 1995.769.211,

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AGENCY: Federal Aviation Administration, DOT, 14CFR Part 39 [Docket No, 2002-NM-12-AD] RIN2120-AA64 Airworthiness Directives; Boeing Model 737-300, -400, -500, -600, -700, -700C, -800, and -900; 747-400; 757; 767; and 777 Series Airplanes ACTION: Supplemental notice ofproposed rulemaking; reopening ofcomment period, SUMMARY: This document revises an earlier proposed airworthiness directive (AD), applicable to certain Boeing Model 737-300, -400, -500, -600, -700, -700C, -800, and -900; 747-400; 757; 767; and 777 series airplanes, The original NPRM would have NITlALSi IG required modifying the static inverter byrelocating resistor RI70 ofthe static inverter bridge assembly, This new action revises the original NPRM by adding anew requirement formodifying the static inverter by replacing resistor RI70 with anew resistor and relocating the new resistor, The actions proposed bythis supplemental R Uflr-;(; SY!'.HJOL 

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ADDRESSES: Submit comments intriplicate tothe Federal Aviation Administration (FAA), Transport Airplane Directorate, ANM-114, Attention: Rules Docket No, 2002-NM-12-AD, 1601 Lind Avenue, SW" Renton, Washington 98055-4056, Comments may be inspected atthis location between 9:00 a,m, and 3:00 p,m" Monday through Friday, except Federal holidays, Comments may be submitted via faxto[491O-13-U]

DEPARTMENT OF TRANSPORTATION INllIAlSIS1G, 

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AGENCY: Federal Aviation Administration, DOT. Airworthiness Directives; Boeing Model 737-300, -400, -500, -600, -700, -700C, -800, and -900; 747-400; 757; 767; and 777 Series Airplanes 14CrR Part 39 [Docket No. 2002-NM-12-AD] RIN2l20-AA64

ACTION: Supplemental notice ofproposed rulemaking; reopening ofcomment period. SUMMARY: This document revises an earlier proposed airworthiness directive (AD), DAn kOUII"'(;SYMI:IUL 

### 100S applicable to certain Boeing Model 737-300, -400, -500, -600, -700, -700C, -800, and -900; 747-400; 757; 767; and 777 series airplanes. The original NPRM would have NlTlAL!ilSIG required modifying the static inverter byrelocating resistor Rl70 ofthe static inverter ",OUTING Snll\OL bridge assembly. This new action revises the original NPRM by adding anew requirement formodifYing the static inverter byreplacing resistor Rl70 with anew resistor and relocating the new resistor. The actions proposed bythis supplemental NPRM are intended to prevent astandby static inverter from overheating, which could ~IlIALS.SIG

OliTI:-G SYMROL NlTIALSISIG result insmoke inthe flight deck and cabin and loss ofthe electrical standby power system. This action is intended to address the identified unsafe condition. DATES: Comments must bereceived by [insert date 25 days after date ofpublication in the Federal Register]. ADDRESSES: Submit comments intriplicate to the Federal Aviation Administration "TTIALS/SIG

OV11l'.G SYMI~OL (FAA), Transport Airplane Directorate, ANM-II4, Attention: Rules Docket No. j~lTlAJ.SlSJG 2002-NM-12-AD, 1601 LindAvenue, SW., Renton, Washington 98055-4056. Comments may be inspected atthis location between 9:00 a.m. and 3:00 p.m., Monday through Friday, except Federal holidays. Comments may be submitted via faxto