[4910-13-PI

DEPARTMENT OF TR<\NSPORTATlON

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-0036; Directorate Identifier 2009-NM-077-AD)

RIN 2120-AA64

Airworthiness Directives; The Boeing Company MadeJ 737-200, -lODe, -300, -400,

and -500 Series Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

SUMMARY: We propose to adopt a new ainvorthiness directive (AD) for certain

Model 737-200, -200C, -300, -400, and -500 series airplanes. This proposed AD would

require repetitive inspections for cracking and corrosion of the skin and surrounding

structure under the number 3 very high frequency (VHF) antenna, and corrective actio

if necessary. Also, for certain ailplanes, this proposed AD would require replacing

bonded skin panels with solid skin panels. This proposed AD results from reports of

cracks in the skin and surrounding structure tmder the number 3 VHF antenna on the

lower external surface of the airplane at Buttock Line 0.0, aft of the main landing gear

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.ITL-'U'SIG wheel well. We are proposing this AD to detect and correct cracks and corrosion of the

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skin and surrounding stmcture under the number 3 VHF antenna, which could result in

separation of the anterma from the ai1plane, and rapid depressurization of the airplane.

DATES: We must receive comments on this proposed AD by [INSERT DATE 45

DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER].

ADDRESSES: You may send comments by any of the following methods:

• Federal eRulemaking Portal: Go to http:// •.'\'\vw.regulations.gov. Follow the

instructions for submitting comments.

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14910-I3-P)

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

2010- 003&

[Docket No. FAA~+++++; Directorate Identifier 2009-NM-077-ADj

RIN 2120-AA64

Airworthiness Directives; The Boeing Model 737-200, -lODe, -300, -400 and -500

Series Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain

Boeing Model 737-200, -200e, -300, -400, and -500 senes airplanes. This proposed

would require repetitive inspections for cracking and corrosion of the skin and

surrounding structure under the number 3 very high frequency (VHF) antenna and

corrective actions if necessary. This proposed AD would also provide for terminating

action for certain repetitive inspections for certain airplanes. Also, for certain airplanes,

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this proposed AD would require replacing bonded skin panels with solid skin panels. T 1S

proposed AD results from reports of cracks in the skin and surrounding structure under

the number 3 VHF antenna on the lower external surface of the airplane at Buttock Lin

0.0, aft of the main landing gear wheel well. We are proposing this AD to detect and

correcl cracks and corrosion of the skin and surrounding structure under the number 3

VHF antenna, which could result in separation of the antenna from the airplane, and ra ff'o\l.SI!JG

depressurization of the airplane.

DATES: We must receive comments on this proposed AD by [insert date 45 days aftcr OUTING SYMBOL

date of publication in the FEDERAL REGISTER].

ADDRESSES: You may send comments by any of the following methods:

• Federal eRulemaking Portal: Go to http://www.regulations.go\'. Follow the

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1491O-I3-PJ

DEPARTMENT OF TRANSPORT AnON

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2009-+++++; Directorate Identifier 2009-NM-077-AD]

. RIN 2120-AA64

Ainvortbiness Directives; Boeing Model 737-200, -200C, -300, -400 and -500 Series

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Boeing Model 737-200, -20De, -300, -400, and -500 series airplanes. This proposed AD ~A'~

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would require repetitive inspections for cracking and corrosion of the skin and outin~Sy",!I<>1

Airplanes

ACTION: Notice of proposed rulemaking (NPR1v1).

AGENCY: Federal Aviation Administration (FAA), DOT.

SUMl\IlARY: We propose to adopt a new airworthiness directive (AD) for certain

surrounding structure under the number 3 very high frequency (YHF) antenna and

corrective actions if necessary. This proposed AD would also provide for terminating

action for certain repetitive inspections for certain airplanes. Also, certain airplane grou

replace the bonded skin panels with solid skin panels, before or concurrently with anoth

Boeing service bulletin. Ths proposed AD results from reports of cracks in the skin and

surrounding structure under the number 3 VHF antenna on the lower external surface of

the airplane at Buttock Line 0.0, aft of the main landing gear wheel welL We are

proposing this AD to detect and correct cracks found under the number 3 YHF antenna,

which could result in separation of the antenna from the airplane, and rapid

depressurization of the airplane.

DATES: We must receive comments on this proposed AD by [insert date 45 days after

date of publication in the FEDERAL REGISTER].

ADDRESSES: You may send comments by any of the following methods;

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• Federal eRulemaking Portal: Go to http;//www.regulations.l!ov. Follow the
14910-13-P]

DEPARTMENT OF TRAl'lSPORTATION

Federal Aviation Administration

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IDocket No. FAA-2009-1 I I I I j Directorate Identifier 2009-NM-077-AD)

14 CFR Part 39

ACTION: Notice of proposed rulemaking (NPRM).

Ainvorthiness Directives; Boeing Model 737-200, -200e, -300, -400 and -500 Series

Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain

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Boeing Model 737-200, -200e, -300, -400, and -500 series airplanes. This proposed AD "Am

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would require repetitive inspections for cracking and corrosion of the skin and -"115_

, RIN 2120-AA64

surrounding structure under the number 3 very high frequency (YHF) antenna and

corrective actions if necessary. This proposed AD would also provide for terminating

action for certain repetitive inspections for certain airplanes. Also, certain airplane grou

replace the bonded skin panels with solid skin panels, before or concurrently with anoth

Boeing service bulletin. This proposed AD results from reports of cracks in the skin and

surrounding structure under the number 3 VHF antenna on the lower external surface of

the airplane at Buttock Line 0.0. aft of the main landing gear wheel well. We are

proposing this AD to detect and correct cracks found under the number 3 VHF antenna,

which could result in separation of the antenna from the airplane, and rapid

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depressurization of the airplane.

DATES: We must receive comments on this proposed AD by [insert date 45 days after

date of publication in the FEDERAL REGISTER].

ADDRESSES: You may send comments by any of the following methods:

• Federal eRulemaking Portal: Go to http://www.regulatiollS.goV. Follow the

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