DEPARTMENT OF TRANSPORTATION

14910-I3-Pj

CONCU""fNCE.\

ROuTING"'''BDL

Federal Aviation Administration

14 CFR Part 39

,.0j.'" IDocket No. FAA-2009-0866; Directorate Identifier 2009-NM-074-AD; Amendme

\w~~'; AD *~ J-.O ID- 11-1';-

RlN 2120-AA64

L.(-'l

INITIALS'"'G

(·L~

o••'"~( ( ~o/l'

ROUTt~G',""'BOl

Airwortbiness Directives; McDonnell Douglas Corporation Model MD-ll and MD-l F£ '/:ID

IWUTING-"'''ROI.

Airplanes KNJ.A - 'j) i

INITrALSlSlG

AGENCY: Federal Aviation Administration (FAA), Department of Trallsp0l1ation

(DOT).

ACTION: Final mle.

SUMMARY: The FAA is superseding an existing airworthiness directive (AD), whicl

applies to certain Model :MD-l1 and J\.1I)-llF airplanes. That AD currently requires a

"OUTING SI'M

one-time inspection to determine ifmetalbc transitions are installed all wire hamesses f

J

the tai I tank fuel transfer pumps, and to detemline if damaged wires are present; and

INITI,\I.s:SIG

D,\Tf.

repair, if necessary. That AD also reqUIres repetitive inspections of the repaired area; a d

a permanent modification of the wire harnesses if metallic transitions are not installed,

which would tenninate the repetitive inspections. This new AD requires modifying the

case grounding for the alternate fuel pump orthe tail tank, the leak detection themlal

switch grounding for the number 2 engine, and wire braid grounding in the empennage

R(lUT'N(I SHII!QL

and number 2 engine inlet. This AD also removes one aiJplane from the applicability 0 ITIAL..'i'''';

the existing AD. This AD results £i·omreports that the wire assembly for the alternate QATE

fuel pump is missing a case ground wire, and the lightning protection wire braid for Wil u'tI"GSYMUQL

assemblies located in the empennage and number 2 engine inlet are grounded improper ~:I'I"I-SISIG

We are Issuing this AD to prevent insufficient grounding of the fuel pump, which in
{4910-13-P]

DEPARTMENT OF TRANSPORT AnON

Federal Aviation Administration

14 CFR Part 39

lDockct No.FAA-2009-0866; Directorate Identitier 2009-NM-074-AD; Amendment

39-**; AD **}

RIN 2120-AA64

Ainvorthincss Directives; McDonnell Douglas Corporation Model MD-ll and MD-I1F

Airplanes

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

(DOT).

ACfION: Final rule.

SUMJ\!lARY: The FAA is superseding an existing airworthiness directive (AD), which

applies to cerrain ModeJ MD-!l and NID-IIF airplanes. That AD currently requires a

one-time inspection to determine if metallic transitions are installed on wire harnesses of

the mil tank fuel transfer pumps, and to determine if damaged wires are present; and

repair, if necessary. This new AD requires modifying the case grounding for the alternate

fuel pump of the tail tank, the leak detection thermal switch grounding for the number 2

engine, and wire braid grounding in the elllpel11lage and number 2 engine inlet. This AD

also removes one airplane from the applicability of the existing AD. This AD results

from reports that the wire assembly for the alternate fuel pump is missing a case ground

wire, and the lightning prolection \Vire braid for wire assemblies located in the

empennage and number 2 engine inlet are grounded improperly. We are issuing this AD

to prevent insulTicient grounding ofthe fuel pump, which in combination with an

elecrrical failure within the fuel pwnp and a compromised electrical bond could cause a

fuel tank ignition, resulting in consequent fire or explosion.

\

__ if

3-;2 -10

FAA Form 1360-14.1 (6-89) OFFICIAL FILE COpy ,U,S. ClOVERN!J.ENT PRJNTING OFf'ICE: 1~;5· 799-21'