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Airworthiness Directives; The Boeing Company Model 737-600, -700, -70De, -800,

RIN 2120-AA64

Federal Aviation Administration

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IDocket No. FAA-2010-++++j Directorate Identifier 20J O-NM-l 83-AD]

14 CFR Part 39

-900, and -90GER Series Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

DEPARTMENT OF TRANSPORTATION

ACTION: Notice of proposed rulemaking (NP.RM).

SUMl\'lARY: We propose to adopt a new airworthiness directive (AD) for certain Mod ~A1/,5/'6 "TINGSYMllOl

737-600, -700, -70De, -800, -900, and -90GER series airplanes. This proposed AD wou d

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require modifying lhe thrust reverser inner walls, inspecting for damage of the upper an

lower inner wall insulation blankets, measuring the electrical conductivity on the

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aluminum upper compression pads 2 and 3 as applicable, inspecting for discrepancies 0

tbe inner wall of the thrust reverser, and corrective actions if necessary. This proposed

AD would also require, for certain airplanes, d~ing various concunent actions (includin ,,'r.

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replacing the inner wall blanket insulation, installing updated full-authority digital

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electronic control software, and modifying the thrust reverser inner wall and insulation

I - blankets). This proposed AD results from repors of heat damage to the inner wall ofth

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thrust reversers. We are proposing this AD to detect and correct such heat damage,

which could result in separation of adjacent components and consequent structural

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damage to the airplane, damage to other airplanes, and injury to people on the ground.

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 hJp:I/www.regUlutions.gOv. Follow the
14910-13-PI

DEPARTMENT OF' TRANSPORTATION

Federal Aviation Administration

14 eFR Part 39 :OHCUH!\fNCES

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IDocket No. FAA-2010-++++; Dir«torate Identifier 2010-NM-183-AD}

RIN 2120-AA64

Airworthiness Directh'es; The Boeing Company Model 737-600, -700, -700c, -800,

-900, and -900ER Series Airplanes { D

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

SUMMARY: We propose to adopt a new ain'lorthiness directive (AD) for certain Model

737-600, -700, -700e, -800, -900, and -900ER series airplanes. This proposed AD would

require modifying the thrust reverser inner walls, inspecting for damage of the upper and

lower inner wall insulation blankets, measuring the electrical conductivity on the

aluminum upper compression pads 2 and 3 as applicable, inspecting for discrepancies of

the inner wall of the thrust reverser, and corrective actions if necessary. This proposed

AD would also require, for certain airplanes, doing various concurrent actions (including

replacing the inner wall blanket insulation, installing updated full-authority digital

electronic control software, and modifying the thrust reverser inner wall and insulation

blankets). This proposed AD results from reports of heat damage to the inner wall or the

thrust reversers. We are proposing this AD to detect and correct such heat damage,

which could result in separation of adjacent components and consequent structural

damage to the airplane, damage to other airplanes, and injury tolpeople on the ground.

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

DAYS AFTER DATE OF PUBLlCAT10N IN THE FEDERAl!, REGISTER].

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

• Federal eRulemaking Portal: Go to http://w.vw.rc!!.ulations.!!.ov. Follow the

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