[4910-1

DEPARTMENT OF TRANSPORTA nON

Federal Aviation Administration

14 CFR Pa •.' 39

;1D I 0 - () 7 'I '3

ID~c4etNo. FAA-20**-++++; Directorate Identifier 2010-NM-174-AD; Amendm 3t**/~**)- ~OIO-ll-1 q

R1N 2120-AA64

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

-900, and -900ER Series Airplanes

AGENCY: Federal Aviatiol1 Administration (FAA), Department of Transportation

(DOT),

ACTION: Final rule; request for comments.

SUi\'lMARY: The FAA is superseding an existing ainvorthiness directive (AD) that

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applies to all Model 737-600, -700, -700C, -800, -900, and'-900ER senes airplanes, Th

existing AD currently requires, for certain airplanes, a one~time detailed inspection of t

inboard and outboard aft attach lugs of the left and right elevator control tab mechanisl

for discrepancies, and replacement of any discTpant elevator tab control mechanism. F

certain other airplanes, the existing AD requires that the inspections be done repetitivel

Replacing the elevator control tab mechanism lith a new Boeing-built mechanism

tenninates the repetitive inspections in the eXiS~ingAD. This new AD requires that

modified repetitive inspections be done on all airplanes, regardless of accomplishment

the temlinating action specified in the existing AD. This AD results from reports of

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failure of the aft attach lugs on the left elevator tab control mechanism, which resulted il 'N"",""'OC;NA,lJf<f

severe elevator vibration. This AD also results from reports of gaps in elevator control OAf~

tab mechanisms and ill13lySiSthat additional e+ator control tab mechanisms might hay

bearings that will come loose. We are issuing trs AD to detect and CQITectdiscrepancies

in the aft attach lug of the elevator tab control mechanism, which could result in

FAA Form '360-14_' (6-89) OFFICIAL FILE COPY
(4910-13-PJ

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration ONCURR£"~(S

ROUTING SYMaOL

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J UenJ".h1

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ACTION: Final rule; request for comments.

certain other airplanes, the existing AD requires that the inspections be done repetitively

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applies to all Model 737-600, -700, -70De, -800~ -900, and -900ER series airplanes. The Nm;66 &b

existing AD cun-ently requires, for certain airp+es, a one-time detailed inspection ofth m

inboard and outboard aft attach lugs of the left and right elevator control tab mec.banism ovn;::fJ"'-4ct!3

for discrepanc.ies, and replacement of any discrepant elevator tab control mechanism. Fo fS'it_

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Replacing the elevator control tab mechanism with a new Boeing-built mechanism

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

(DOT).

Ainvorthiness Directives; The Boeing Company Model 737-600, -700, -700e, -800,

-900, and -900ER Series Airplanes

14 CFR Part 39

39_H; AD **1

R1N 2120-AA64

SUMMARY: The FAA is superseding an existing ainvorthiness directive (AD) that

[Docket No. FAA-20**-++++; Directorate Identifier 201O-NM-174-AD; Amendme

. h ... . . I .. AD Th' AD . h A0/lL-Ioo5 termmates t e repetitIve inspectIOns 10 t lC eXIstmg . IS new reqUIres t at Nl

modified repetitive inspeetions be done on all aJ]Jlanes, regardless of aeeomplishment 0 "e,iJ~' ~

the terminating action specified in the existing AD. This AD results from reports of OUTINGSY>tIl(ll.

failure of the aft attach lugs on the left elevator tab control mechanism, which resulted i

severe elevator vibration. This AD also results fLm reports of gaps in elevator control

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tab mechanisms and analysis that additional elevator control tab mechanisms might have ovnl"GsYHI\Ol.

bearings that will come loose. We are issuing this AD to detect and correct discrepancie

in the aft attach lug oftl1e elevator tab control mLhanism, which could result in
[4910-13-P)

DEPARTMENT OF TRANSPORTATION

.~ederal Aviation Administration ONCURltENCES

OUTING$YMWl

14 CFR ParI 39

[Docket No. FAA-20**-++++; Directorate Identifier2010-NM-t74-AOj Amendme

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R1N 2120-AA64

39-**; AD **1

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for discrepancies, and replacement of any discrepant elevator tab control mechanism. Fo NmAL5l5lG

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

-900, and -900ER Series Airplanes I

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

inboard and outboard aft attach lugs of the left and right elevator control tab mechanism

existing AD currently requires, for certain airplanes, a one-time detailed inspection of th }

ACTION: Final rule; request for comments.

SUMMARY: The FAA is superseding an existihg airworthiness directive (AD) that 9Uljn~Sytn

applies to all Model 737-600, -700, -700C, -SOO)-900, and -900ER series airplanes. The

certain other airplanes, the existing AD requires that the inspections be done repetitively ATE'

I

Replacing the elevator control tab mechanism with a new Boeing-built mechanism ounNG SVMw..

terminates the repetitive inspections in the existing AD. This new AD requires that

modified repetitive inspections be done on all airplanes, regardless of accomplishment 0 An

the ternlinating action specified in the existing AD. This AD results from reports of OIfflWG sYMBOl.

failure of the aft attach lugs on the left elevator tlb control mechanism, which resulted i NmAl.SISIG

severe elevator vibration. This AD also results fr~m reports of gaps in elevator control ATE

tab mechanisms and analysis that additiC:nal elevator control tab mechanisms might have

~~~

bearings that will corne loose. We are issuinB this AD to detect and correct discrepancie

in the aft attach lug of the elevator tab control mechanism, which could result in