(4910-13-PI

c,. (8 (0.

NM-iIS ~l.S'SKl

C (,L....-

""b!'-(!tO

AGENCY: Federal Aviation Administration (FAA), Department of Transportation

Federal Aviation Administration

(DOT).

ACTION: Notice of proposed rulemaking (NPRM).

Airworthiness Directives; McDOImell Douglas Model DC-8-3I, DC-8-32, DC-8-33,

R1N 2120-AA64

DEPARTMENT OF TRANSPORTATION

DC-8-41, DC-8-42, and DC-8-43 Airplanes; Model DC-8-51, DC-8-52, DC-8-53, and

DC-8-55 Airplanes; Model DC-8F-54 and DC-8F-55 Airplanes; Model DC-8-61,

DC-8-62, and DC-8-63 Airplanes; Model DC-8-61F, DC-8-62F, and DC-8-63F

Airplanes; Model DC-8-71, DC-8-72, and DC-8-73 Airplanes; and Model DC-8-71 F,

DC-8-72F, and DC-8-73F Airplanes

14 CFR ParI 39 ~3q

[Docket No. FAA-20]O~; Directorate Identifier 2009-NM-232-AD)

SUM:MARY: The FAA proposes to supersede an existing airworthiness directive (AD

Nin"I",,'SIG

that applies to all McDonnell Douglas airplanes identified above. The existing AD

J)~'r"

CU1Tently requires revising the maintenance program to incorporate new aif\vOIihincss

"OUTINC.\\'MIIlJL.

limitations for fuel tank systems to satisfy Special Federal Aviation Regulation No. 88

requirements. This proposed AD would add requirements to revise the maintenance

program to incorporate specific Critical Design Configuration Control Limitations omNC S'·"IlQL

(CDCCL) information and install fuel tank float switch in-line fuses. This proposed

would also add a certain Airworthiness Limitations inspection (All). This proposed

results from a design review of the fuel tank systems. We are proposing this AD to

prevent the potential for ignition sources inside fuel tanks caused by latenl failures,

alterations, repairs, or maintenance actions, which, in combination with flammable fuel ",,'Ie

vapors, could result in a fuel tank: explosion and consequent loss of the airplane.
14910-13-P] I~

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

IDocket No. FAA-2010W-++++j Directorate Identifier 2009-NM-232-ADJ

R1N 2lZ0-AA64

Ainvorthiness Directives; McDonnell Douglas Model DC-8-3l, DC-8-32, DC-B-33,

DC-B-41, DC-8-42, and DC-8-43 Airplanes; Model DC-8-51, DC-8-52, DC-8-53, and

DC-8-55 Airplanes; Model DC-SF-54 and DC-SF-55 Airplanes; Model DC-8-61,

DC-8-62, and DC·8·63 Airplanes; Model DC-8-6 t F, DC-8-62F, and DC-8-63F

Airplanes; Model DC-8-?l, DC-8-72. and DC-8-?3 Airplanes; and Model DC-8-71F,

DC-8-72F, and DC-8-73F Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of Transportation

(DOl).

ACTION: Notice of proposed rulemaking (NPRM).

SUMMARY: The FAA proposes to supersede an existing airwortbiness directive (AD)

that applies to all McDonnell Douglas airplanes identified above. The existing AD

currcntly rcquires revising the maintenance program to incorporate new airworthiness

limitations for fuel tank systems to satisfy Special Federal Aviation Regulation No. 88

requirements. This proposed AD would retain the requirements of the existing AD, and

require revising the maintenance program to incorporate specific Critical Design

Configuration Control Limitations (CDCCL) information and installing fuel rank float

sv.itch in-line fuses. This proposed AD would also add Airworthiness Limitations

inspections (ALIs). This proposed AD results from a design review of the fuel tank

systems. We are proposing this AD to prevent the potential for ignition sources inside

fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in

M I

S't2.0-/D

ROOTINj$""'FIO'

INIT""-r .....n..o< ••

O~'F-

--

FAA Form 1360-14.1 (6-89) OFFICIAL FILE COPY