[4910-13-U]

DEPARTMENT OF TRANSPORTATION 'ONCURIlf.NCFS

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Federal Aviation Administration

ACTION: Supplemental notice of proposed rulemaking; reopening of comment period.

14 CFR 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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SUMMARY: This document revises an earlier supplemental notice of proposed

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ounNGSYMllOL inverter by replacing resistor R170 with a new resistor and relocating the new resistor.

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rulemaking (NPRM), applicable to certain Boeing Model 737-300, -400, -500, -600, a5

• • N1TlALSISJG -700, -700C, -800, and -900, and 747-400 senes airplanes; and Model 757,767, and 777

airplanes. The first supplemental NPRM would have required modifying the static

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No. 2002-NM-12-AD, 1601 Lind Avenue SW., Renton, Washington 98057-3356.

ADDRESSES: Submit comments in triplicate to the Federal Aviation Administration

the Federal Register].

DATES: Comments must be received by [insert date 25 days after date of publication i 'on'"""G

This new action revises the first supplemental NPRM by adding certain airplanes to the

identified unsafe condition.

(FAA), Transport Airplane Directorate, ANM-114, Attention: Rules Docket

and loss of the electrical standby power system. This action is intended to address the

static inverter from overheating, which could result in smoke in the flight deck and cabi

actions specified by this second supplemental NPRM are intended to prevent a standby

applicability, changing certain airplane groups, and adding certain part numbers. The

Comments may be inspected at this location between 9:00 a.m. and 3:00 p.m., Monday
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modifying the static inverter by relocating resistor RI70 of the 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 OF TRANSPORTATION

ACTION: Notice of proposed rulemaking (NPRM).

14 CFR 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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Comments may be inspected at this location between 9:00 a.m. and 3:00 p.m., Monda

assembly. This action is necessary to prevent a standby static inverter from overheati

which could result in smoke in the flight deck and cabin and loss of the electrical stan

INmA GNATU

DATES: Comments must be received by [insert date 45 days after date of publication in

power system. This action is intended to address the identified unsafe condition.

the Federal Register].

ADDRESSES: Submit comments in triplicate to the 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 fax to

(425) 227-1232. Comments may also be sent via the Internet using the following

address: 9-anm-nprmcomment@faa.gov. Comments sent via fax or the Intemet must

contain "Docket No. 2002-NM-12-AD" in the subject line and need not be submitted in

FAA Form 1360-14.1 (6.89) OFFICIAL FILE COPY ~ u.s. GOVERNMENT FAINTING OFfiCE: 1995.769.211
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[4910-13-U]

DEPARTMENT OF TRANSPORTATION

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Federal Aviation Administration

AGENCY: Federal Aviation Administration, DOT,

14 CFR 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; 747-400; 757; 767; and 777 Series Airplanes

ACTION: Supplemental notice of proposed rulemaking; reopening of comment 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

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required modifying the static inverter by relocating resistor RI70 of the static inverter

bridge assembly, This new action revises the original NPRM by adding a new

requirement for modifying the static inverter by replacing resistor RI70 with a new

resistor and relocating the new resistor, The actions proposed by this supplemental

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system, This action is intended to address the identified unsafe condition,

DATES: Comments must be received by [insert date 25 days after date of publication in ",/~,/

the Federal Register].

NPRM are intended to prevent a standby static inverter from overheating, which could

result in smoke in the flight deck and cabin and loss of the electrical standby power

ADDRESSES: Submit comments in triplicate to the 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 at this location between 9:00 a,m, and 3:00 p,m" Monday

through Friday, except Federal holidays, Comments may be submitted via fax to
[491O-13-U]

DEPARTMENT OF TRANSPORTATION

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Federal Aviation Administration

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

14 CrR Part 39

[Docket No. 2002-NM-12-AD]

RIN 2l20-AA64

ACTION: Supplemental notice of proposed rulemaking; reopening of comment period.

SUMMARY: This document revises an earlier proposed airworthiness directive (AD),

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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

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required modifying the static inverter by relocating resistor Rl70 of the static inverter ",OUTING Snll\OL

bridge assembly. This new action revises the original NPRM by adding a new

requirement for modifYing the static inverter by replacing resistor Rl70 with a new

resistor and relocating the new resistor. The actions proposed by this supplemental

NPRM are intended to prevent a standby static inverter from overheating, which could

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result in smoke in the flight deck and cabin and loss of the electrical standby power

system. This action is intended to address the identified unsafe condition.

DATES: Comments must be received by [insert date 25 days after date of publication in

the Federal Register].

ADDRESSES: Submit comments in triplicate to the Federal Aviation Administration

"TTIALS/SIG

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(FAA), Transport Airplane Directorate, ANM-II4, Attention: Rules Docket No.

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2002-NM-12-AD, 1601 Lind Avenue, SW., Renton, Washington 98055-4056.

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

through Friday, except Federal holidays. Comments may be submitted via fax to