- ,y

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

Airplanes

[491Q-13-P[

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

listed above. This proposed AD would require installing new in-line fuses for the fuel n;

level float switch and new in-line fuses for the pressure switch, as applicable, and lITC'«; 'MBO

RlN 2120-AA64

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Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-14, DC-9-15i r 3

and DC-9-15F Airplanes; and DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series "'''~"

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39 <1

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[Docket No. FAA-2010-++++; Directorate Identifier 2010-NM-188-AD]

changing the wiring. The proposed actions would affect the left and right wing forward I .oas1G

spars, center wing forward spar, forward auxiliary fuel tank, and aft auxiliary fuel tank, E

I

applicable. This proposed AD was prompted by fuel system reviews conducted by the jOllTlN(;SYMDOl

manufacturer. We are proposing this AD to prevent the potential of ignition sources (ITI~IG

inside fuel tanks, which, in combination with flanunable fuel vapors, could result in fn I Alf

tank explosions and consequent loss of the airplane.

DATES: We must receive comments on this proposed AD by [INSERT DATE 4S

DAYS AFTER DATE OF PUBLICA nON IN THE Federal Register). n

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

• Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the

instructions for submitting comments .

• Fax: 202-493-2251.
14910-13-PI

DEPARTMENT OF TRANSPORT AnON

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-++++; Directorate Identifier 2010-NM-188-ADl

RlN 2120-AA64

Ainvorthiness Directives; McDonnell Douglas Corporation Model DC-9-14, DC-9-1 S,

and DC-9-15F Airplanes; and DC-9-20, DC-9-30. DC-9-40, and DC-9-50 Series

Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulcmaking (NPRM).

SUMMARY: We propose to adopt anew ainvonruness directive (AD) for the products

listed above. This proposed AD would require installing new in-line fuses for the fuel

level float switch and new in-line fuses for the pressure switch, as applicable, and

changing the wiring. The proposed actions would affect the left and right wing forward

spars, center wing forward spar, forward auxiliary fuel tank, and aft auxiliary fuel tank, as

applicable. This proposed AD was prompted by fuel system reviews conducted by the

manufacturer. We are proposing this AD to prevent the potential of ignition sources

inside fnel tanks, which, in combination with flammable fuel vapors, could result in fuel

tank explosions and consequent loss 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 oflhe following methods:

• Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the

instructions for submitting comments .

• Fax: 202-493-2251.

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FAA Form 1360·14.1 (6-89} OFFICIAl FILE COPY