### 25990 Federal Register/Vol. 73, No, gO/Thursday, May B, 

### 200B/Rules and Regulations

Revisi'.ln to Airworthiness Limitations (AWl.sl Sediun (g) Cl",forp.

j)p.cfJmber18, 2()08,riOvise the AWLs s••.

<;Iilloof 111"

l!J~lructions 1'01' Continued Air'worlhiu"'$~ (IC1'\) by incorporating into Ihe MPD the inl'ormatioD in L11e subsections specilled iu paJ'ugn'[.dls (gJ(l), (15)(2).

and [g](3)ofthis AD; Hxceptthal thAinitial inspection requi,ed by pantgraph (h) or this AD mu,t be done at tbe appli.cable (;omplicUlcelime specified in lhal p~r<lgr<l.ph. l\ccompli,hillg the r••.

vision in u(;(;0rd>Ulce with i\ 1atfJr

re"ision ofthe MI'D is an acceptable Ilwlh'odorcomplirJ.nCO ifthu l'I~visi()n

is appl'oved by Ibo Mandger. Seelile Aircrdfl Certificalion 01Ticu(ACOJ,F/\A. (1) S"bsection E, ·'.'\mWUKJ'HIN!;;SS LtMlTATlONS-FUl::L SYS'l'r:MS," of Kevision March 2008 ofth8 MI'D. (2) Subs,!Clioll F. "Pl\GE FORMAT: FUEL SYSTEM AIl{WUKI'HtNt::SSLlMlTA'I'IONS," ofRevision March 2008 ufll1(1 MPD. (31SlIbsl}clionG, "l\lRWOKI'HtNESS LlMITAT[ONS-FLJ~;L SYSTt::MAWLs," A"'VL~ No. 2B-AWL-01 lhrough No. 28- AWL-22 inclusive. Ill'Revision M~rch 2008 ofthe MrD. As au optiDIlal action, AWLs No, 2fJ-AVVL-23and No. 28-AWL-24, a8 idEJoUfi'Jd

ill SubsectiDll Gof !{1O"ision M~rch 2008 orth(, Mi'D, also rnuy b••irll:Orp(Jruled into Ih" AWL.ssection or the ICA. lnitialln;;pedion and Repair ifNecl}ssary (h) At IIII.!

1H.IEJr ofthHcompliance time~ specified in pcr.ragrapbs(h)(l) und [h)[2) of thb AD, du a special detailed inspectioIl 01' lh" lightlling shield to ground lermination Oll lhe oUI-ol'-tank1'1l",1

quantity indication syslem (FQIS) wiring to verify functional integrity, in ~t.:t.:orda!H;e with AWL No. 28- IIWL-03 of S"bsection GofKcvisi[)n Mill'ch 2008 [)flh(;MI'IJ_II',lOY discrepaucy is round during the inspllclioll, fHpairthB discrepallCy bel'ore Illrther flight ill accllrdallce with AwL No. 28-AWL-0:J of SubsBction GofRevi~i(Jll March 2008 olthe MPIJ, ACGomplishing the action$ rllqu.iredby lhi~ [;Jdragrdphin accordance wilh a l~ler 1'l>l'i5iOIl ofthe MPO is all acceptable method ofcompli,illce ifthe revision 1$UPPl'Ov.)d

by the Mclllager.Seattle I\CO. Act:umplisbing AWL No. 28-AWL-0~

as P()rtOr;j[]FAA-,lpproved maintenance program before the appliGabJe comp1ianclO lime SjJlO(;ilied

illjJufdgnlj)h (h)[l) or (h)[2) or thi5 ADconsLitut"s complifl.Ilcewith the requirements ofthis pdlUgnLph, Not" 3; For the P"rpO$'.JS oj'tbi~ AD, a special detailed imp'Jction is: "'An intfJllSlvl:l eXiolmin~ti()n

of
~spedlk itr.m. in$lnllaLion.

or flssembly lOdetect damage, l'aiIlll"e. or irregularity, The exumio;ltiOll is likoly to mdk~ extellsive use ufspeci~li;oed inspedion tschlli'lu';$ ,md/or oqLliprnulll.IOlric(lle cleaning and ,ub~l,mtial ~ccess or disa,sembly procedure may be requirlOd." (1) Within 120 months sinc[) the data 01 issuaucu oj'thu original slllnrlard airworthiness cf:I't.iTicatioll Ofthe date 01 issuance ofthe original ",xjJortG"rtilklltc oj' airwortbiJle~s. [2) Within 24 mUllth~ililer the eiTfJctive date uflhb AIJ. No Ait"rnative Inspe(;tions, Inspection Intervals, or Critical Design Configuration Control Limitations (CDCCLs) (i) After accomplishing lhe actions specifi~d ill paragraphs (g)illld (h) ofthis AD.

no ulternaUve inspections, inspection intervals, or CDCCLsm«y be llf;(!dunless the lll~pections. inlervals. or CDCCLsam part of

~later I'evision ofJ{evi$ioDMal'ch 2008 ofUle MPOlb~11

i$ approved by the Manager, S",<lttle ACO; or unless the in'p"'ctions, inlcf\.'fll$.or CDCCLsare HjJpl"Oved as an AMOC in accordance wltb the procedures specified in par;:,graph (IIollhis AD.
Credit for Actions Don" A(:cording tu Prrwious Revisions ofthe MPD (j) Actions done before th!:! el'feGlivedrIll)01" this AD in ilccorc!dllcewith tb" followiog MPDs are aLceptublc rorGOnlrli~IlCe with lhe 8orrfJ$pondiog rBqllirements ofpamgraphs [g) aud (h) ofthis AD, Section 9 ofthe Llocing 737-liOO/700/700C/700IGW 1800/900 MPD Document, D625A001~CMR Revision March 2006: Kevi~i()nMay 2006; Revision October 200B;Kevision November 20ot3;01'Kevbion Nowrnber 2006 R1; and SeGtion 9 or the Boeing 737-600/700/ilUO!900 MPD Document. DI:\Z6A001-CMR, !(evi$ion March Z007: J{evisiUllMarch 2D07R1; K<Jvision March 2007 1{2:or l{evision Febmary 2008. Terminating Action for AU 2008"'()6-{)3. Amendment 39-15415 [k) tncorporating AWLs No. 28-AWL~21, No, 28-AWL-22. and No. 23-AWL-24 into the AWL$section oftbe ICA in ,lccord,mce wilh paragrJph (g)oflhis AD terminates the action required by paTHgraph[h)(l) oj'AD 200B-D6-03,
Altel'llafive Methuds ofCompliance (AMOCsl (lj[l] 'l'hBMdnllger, Se,ittlAACO. has tbe authorily to approvu AMOCs for lhi~ AD, ir requested in accorduIl'ce with th,~procedures found iJl14 CFJ{39.1D. (2)"1'0rHCjI'est

<J diJferent method of Lompli<lIlC",

or <1 ditTel'eutl:OnlplianLetime I'orthis AD. I"o)[ow

the proctldlm,s in 14 CFJ{ 39_19.BfJfore[Ising ailYo.pproved AMOC on allYail'P1aufJto which the AMOC applies, uotify your appropriate principii1 in$p"'clol' [PI] in the FAA Flight Standards DistTict Oifice (FSDO). or lacking aPI. yOLLr IOG<11 FSDO, Materiallncorpurat"d by Reference (m) Yoo mu~t u~e ClueingTemporary Revision 09-020, dalBd MUTCh 2008. tu the Boeing 731-600/700/800/900 MaintenanC\l PIHllJlingData (MPD)DOCllIllfJnl. 1J6251\001- CM1{, to do the o.ctionsmqllired by this AD, unless thfJAD opeciJ'ieslltllerwise. Hoeing Temporary Ke"ision 09-020 is published a$ Section 9 ofthe Boeiug 737-600/700lilOo/900 MaintfJnance Planning Data [MPD) Document. D626AQ01--eMR, Kevision March 2008. (I) The DimLtor ofthO:! !-"edsrd1 Kegister ,1ppl'()vedthe incorpor~tioo byreference of this ~ervice inl'ormati.oll lllldcl' 5 U,S.C. 552(a) llnd 1 CFX pari 51 (2) For service info,malion idenlified in this AD. ~;ontaclCloeingCOllllllerGlal il.irplanc>s,P.D.Box 3707, Sealli!:!, Washington 98't24-2207. [3JYou may revi."", copies ofthe ~ervice information inGOrpofatedby reference al the FAA, 'j"r~n~porlAirplarw Direl:tllfate, 1601 Lind i\vellue SW., I{euton, Wesbington; or al the National !\rchive~ and Kecords Admillistration [NAKA).For information on the availability ofthis Ill~lerial al NAKA. eil! 2D2-741-6030, or go 10: h1Ip:lhVWVi. (JrciJiW!s.govI [UdVIU IJugisle rl code_iJLfedemJ JeguJ()lio(),~1 ibr_Iocation.>.hlmi
Issued in J{eutou, Wa~hingIOIl.Of]Apri.1Z9, 

### ;woa. Ali Hahrami,
,!1;Jum18c'f. "l'r{1n~porl Airpfrl!w lJircdo!"u!r<. Airvru[t CvrUj'icutioll 8(1f\ll£:r,'. iJ'1{ DOl:. ~B-991g Filed 5-7-UB; H:4S ;;lrnl

BilliNG COOE' 4910-13-P

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39
[Docket No. FAA-2007-28386; Direclorate Identifier 2006~NM~162-AD; Amendment 39-15512; AD 2008--10-06]

RIN 2120-AA64

Airworthiness Directives; Boeing Model 747-400, -400D, and -400F Series Airplanes
AGENCY;

Federal Aviation Administration (FAA), DOT. ACTION:

Final rule.

SUMMARY: We rlrP. adopting!1 new airwortbiness directive (AD] for certain Boeing Model 747--400, ~4000, rind -400F series airplanes. This AD requires revising the FAA-approved maintenance program by incorporating llew airworthiness limitations (AWLs) for fuel tank systems to satisfy Special Federal Aviation Regulation No. 88 requirenIent$. This AD (Ilso requires the initial inspection of certain repetilive AWL inspections to phas(j in those inspections, and repelir if necessary. This AD results from a design review of the fuel tank systems. We are issuing this AD to prevent the potentiuJ for ignition sources inside fud tanks caused by latenll'ailures, altcmt'ions, repairs, or m<lintenance actions, which, in combination with f1aIumable fuel vi;ipors, could result in a fltel tank explosion and consequent loss of the airplane.
DATES:This AD is effective June 12. 2003. The Director of the Federal Register approved the incOl'pOl'alion by referenc(~ of a certain publication listed ill this AD
as ofJune 12,2008. ADDRESSES:For sen'ice information identified in this AD, contact Boeing

### federal Register/Vol. 73, No, 90/ThlUsday, May 8, 2008/Rnles and Regulations 

### 25991

Commercial Airplanes, P.O. Box 3707. Seattle, Woshington 98124-2207. Examining the AD !Jo(:ket
You may examine the AD docket on the Internet at http:// www.regufations.gov; or in person at Lhe Docb;t Managemeot facility between 9
a,m. and 5 p.rn" Monday through Friday, except F'ederillholidays, The AD docket conlains this AD. the regulatory evalui;ltion, any comments received. and other informatiOll. The address for the Dac;kelOffice (telephone 800-547-5527) is the Document Managemenl F<:lcility, U,S. Department ofTmnsportation. Docket Opf;\ratiolls,M-,lO, West Building Ground Floor. Room W12-140, 1200 New Jersey Avenue. SE., Washington. DC20590.
FOR FURTHER INFORMATION CONTACT: Sulmo Mal'ianu, Aerospace Engineer, Propulsioll Branch, ANM-140S, fAA, Seattle Aircraft Certification Office, 1501 Lind i\venLle, 5W., Renton, Washingtoo 98057-·3355; telephone (425)917---6501; fax (425J917-5590.
SUPPLEMENTARY INFORMAnON:
Discussion We issued Hnolice ofproposed rulemaking (NPRM)to amcnd 14 CFR part 39 to include an airworthines~ directivo [AD)that would apply to certain Boeing Model 747--400. --4000, Hnd-400f ~()riesairplanes. That NPRM

was pllblished in the Federal Regisler

on July 3, 2007 [72 fl~ 35385). That NPRMproposed to require rflvising the FAA-approved maintenance program by incorporating new airworthiocss limitHtion-s(AWLs) for fuel taok svstems to satisfy Special Federal AviatiOl; Regulation No. 88 requirements. Tbat NPRM also proposed to require the initial inspection ofcertain repetitive AWLinspectiolls to phase in those inspections. ami repair ifnecessary. Actions Since NPRM Was Issued Since we issued the NPRM, Boeing has issued Temporary Revision (TR)09- 010, dated March ZOOt!. Boeing TR 09- 010 is published as Section Dofthe 80eing 747-400 Mainh~llallr;ePlarming Data (MPDJDocument, D621U400-9. Revision M<lrch200B (hereafter referred to as "Revision. March 200Buftbe MPD"). The NPRMreferred to Revision Marcil 2005 ofthe MPD as the appropriate source ofservice information foraccomplishing the proposed actions. Revision March 2008 ofthe MPD, amoog other actions. includes the following changes:

~ Removes the repetitive task interval of35,000 Hight hours from AWLs No. 28-AWL-Ol. No. 28-AWL-03. and No. 28-AWL-I0. ~ Revises AWLNo. 28-AWL-03 to reflect the new maximum loop rcsistance values associated with the lightning protect ion ofthe unpressurized fuel quantity illdic:atiug system (fQIS) wire bundle installations.

~ Adds new AWLs No, 28-i\WL-30, No. 28-AWL-31, and No. 28-AWL-32 to incorpornte new critical design configuration control limitations (CDCCLs)forthe electronic fuel level indication system [EfLl) for Modnl 747- 400 snrins airplanes equipped with an auxiliary fuel tank. Accordingly, we have rDvised paragmphs (t), (g), and (h) ofthis ADto refer to I~evisionMarch 2008 ofthe MPD. We also have removed reference to 35.000 lntaillight cycles from Tahle 1 ofthis AD and revised tho initi<:ll threshold foraccomplishing AWLs No, 28-AWL-01, No. 28-AWL-03, and No, 28-AWL-I0 to within 144 months since the date ofissuance ofthe original stand'J.r(lairworthiness certificate orthe dale oj'issuance ofthe original export certificate ofairVl'orthiness. 

### (the NPRM incorrectly specified 36,000 lolal "flight cycles" instead of"l1ight hours.") We also have added anew paragraph (k)to this AD specifying that actions done hefure lhe effective date ofthis AD in accordance with Revisions March 2006 through November 2007 ofthe MPDare acceptable for compliance wilh the corresponding requirements of paragniphs (g)and (h) ofthis AD. Operators should note that we have revised paragraph (g)(3)ofthis ADto require incorporating only AWLs No. 28-I\WL-Ol through No. 28-AWL-23 indusive

..A,WLs

No. 28-AWL-24, No. 28-AWL-25, No, 28-AWL-26, No, 28- AWL-27, No. 28-AWL-28, and No. 28- AWL-29 were added in other revisions ofthe MPD after March 2005 and before March 2008. We have issoed a separate NPRMthat proposes to incorporate AWLNo. 28-AWL-25 into the Ff'\Aappl'Oved maintenance program, We have also issued a separCiteNPRM that proposes to incorporate AWL No. 28- AWL-27 into the FAA-approved maintenance pI'Dgram.Those NPRMs

were published in the Federal Register

on ]HntWry31, 2008 (73 FR5770 and 5773, respectivelyJ We might issue additional rulemaking to require the incorporation ofAWLs No. 28-,\ WI,- 24, No. 28-AWL-26, No. 28-AWL-28. and No. 28-AWL-2':;l. However, as Oil optional action, operatots may iocorporate thosDAWLs as specified in paragraph (g](3)ofthis AD. Further. we have added a new paragraph (i) to this AD. which requires the incorporation ofAWLs No. 28- AWL-30, No. 28-,AWL-31, and No. 28- i\WL-32 on Model 747--400 series airplanes equipped with an iJuxilillry fuel tank. Since none ofthese airplanes

am on the U.S. Register, this change does not impose an addition'll burden

00 any U.S. operators.
Olher Changes Made 10This AD We have revised paragraph (h) ofthis ADto clarify that the actions identified in Table 1 ofthis AD mLlstbe done at the compliance time specified in that table. Also, for standardization purposes. we have revised this 1\0 in the following ways:

'" We have added a nelNpariJgraph (j] to this AD to specify that no alternativ(J inspections, inspection intervnls, or CDCCLsmay be used unless they are part ofa later approved revision of Revision March 2008 ofthe MPD, or unless they are approved as an alternative metbod ofcompliance (AMOC). lnc!usion ofthis pmagraph in the /\0 is intended to ensure that the '!\D·rnandated airworthiness limitations chaoges are treated the same as the airworthiness limitations issued wilh the original type certificate.

o We have revised Note 2 ofthis AD to clarify thnt an oper<ltormust request approval 1'01'

an AMOC ifthe operator canllot accomplish the required inspections because ~nairplane has been previously modified, altered, or repaired in the areas addressed by the required in-spections.
Comments
We gave the pLlblicthe opporlunity to participate in developing this AD. We considered the comments reccived from the six commenters, Requcsi To Allow Inspections Done Acwl'ding to il Mainlenance Program Japan Airlines (JAL)requests that I,ve revise paragraph (hJ afthe NPRM to nllaw an operator to update its FAAapproved m,lintenance program to include the initi,d inspections und repair for certain AWLs. JALstates that tbe NPRM would requi.re accomplishing the initial inspectioo and repair of certnin AWLs, which would reqLlireJAL lo estahlish a special inspection and spedal record keeping forthe proposed requirement, The compliance times specified in pal'flgraph (h) ofthis AD arc intended to provide a grace period for those airplanes that have already exceeded the specified threshold in the MPD. To be in compliance with the recording requirements ofthis AD. opera! ors IIlust record their compliauce with the initial iospection forthose airplanes over Ib,: specified threshold. We have revised paragraph (bJ ofthis 1\Olo specify thiJl accomplishing the <IpplicableAWLs as

### 25992 Federal Register! Vol. 73, No. 90(Thursday, May 8, 2008/ Rules and Regulations

part of an fAA-approved maintendllce program before the applicable (;Qmplianc~ lime constitutes cOlllpli<lllce with the applic(lble requirements of that paragmph.
Request To Revise Intervals fOIr Certain AWL Inspections

KLM Royal Dutch Airlines (KLMj, on behalf of ,mvf:rai operators, requests that

we review a 45-pClge proposal to align certain airworthiness limitation item (ALl) intervals with the applicahle mainlena[]ce significant item (MSl) and enhanced ;conal analysis procedure (EZAP) intervals for Model 737. 747. 757,767, and 777 airplalles. The recommendations in that proposal

ensure that the ALl intervals align with the maintenance schedules ofthe operi:ltors. Among other changes. the proposal recommends revising certain AWL inspection intervals from 12 year$! 36,000 flight hOUIS to only 12 years for Model 747-400, -4000, and -400F series airplanes. Qantas Airwi;lys abo requosts Lhat the 36.000-f1ight-hour parameter be removed from the inspection tllterval [or AWL No. 28-AWL---{ll, No. 2$-AWL03, and No. 28-AVVL-10. The
commenter stales lhal the flight-hour parameter does not adequately take into
account actual airplane usage, and that the long haul utilization ot' the airplane is 5,000 lo 6,000 flight hours per year. Based on lhis number. the commenter states that the AWL tasks would be reqllired at 6 years instead of 12 years. Qalltas Airw8Ys and Lufthansa both
note an inconsistency between the inspection inlerval specifiod in Revisio<1 March 2006 of the MPD and the compliance threshold specified in Table 1 of the NPRM. Table 1 of the NPRM specifies accomplishing the initial inspection within 36,000 total night cycles or 144 months since the date of issuance ofthe original standard airworthiness certificate or the date of iSSllance of the original export certificate of airv'iOl"lhiness, whichever

occurs first. Qantas Airways would welcome the ch,lllge from "Hight hours"
to "flight cycles." if the Hight-hour parameter is not deleted trom the inspection intervals sper.ified in Revision March 2006 of the MPD.
We have reviewed the commenter's requests, and we agree lo revise the compliance threshold for certain AWLs identified by t.he commenters. As stated previollsly. Revision March 2008 ofthe MPD specifies a repetitive interval of 144 months. "Ve have revised the threshold specified in Table 1 of this AD accordingly. Request To Harmonize Task Descriptions

IAL states tbat. in Revision March 2006 of the MPD, tbe task descriptions del"ining the applicable area are different for AWLs Nos. 28-AWL-01 and 28- AWL-02. (AWL No. 28-AWL-01 is a repetitive inspection of the external wires over the center fuel tank, and AWL No. 28-AWL-02 is a CDCCL to maintain the original design features for the extemal \""ires over the center fuel tank.) JAL believes that the task descriptions for these AWLs should match, JAL presumes that. if one purpose for the inspection is to prevent

a spark in the Fuel vapor over tbe center fuel tank, then the applicable area should have a certain tolerance instead of defining t.he area by exact station number We agree that the task descriptions for AWL Nos. 28-AWL--ol and ~8-AWL02 should be harmonized. Revision March 2005 of the MPD includes a revised task description ef AWL No. 28- AWL-Ol, which addresses JAL's
comments. f\S stated previously, we have revised this AD to refer to Revision March 2008 of the MPD. Request To Revise the Loop ResistanCl;l Values for AWL No. 28-AWL--o:1 Hoeing, KLM, Lufthansa, and Qantas Airwoys state that the loop resistance values for AWL No. 28-A WL-03 spec:ified in Revision March 2006 of the MPD are going to be revised, since those valUes are relnvant for production airplanes. The comrnenters also state that the revised values will be more represenlati ve of the expect.ed values for ill-service airplanes. Boeing points out that, acr.ording to paragraph (hl of the NPRM, the revised values should he able to be used in accordance with a later revision of the MPD if the revision is approved by Lhe Seattle Aircrait Certification Office (ACO], FAA. \'Ve agree that operators may use the revised loop resistance values for AWL No. 2S-AWL-03 in accordum:e with Revision March 2.008 of the MPD. As st<lted previously. we have revised this AD according I

y. Requesl To Revise Estimated Costs Qantas Airways states that the workhour estimates provided in the NPRM

seem too small. The comrneoter has submitted its estimates for AWLs No. 28-AWL-Ol, No. 28-AWL-03, No. ~8- AWL-10. No. 28-AWL-17. and No. 28- AWL-21. We infer the COllllllenter requests that

we revise the "Costs of Compliance" ser.tioll 01'this AD to rellect its estimates. We agree to indude the workhour estimates I'or the initial accomplishment of AWLs No. 28-AWI.- 01, No. 28-AWL-03, and No. 28·-AWL10 in this AD, We h,lve not included tho estimate for AWL No. 28-A WL-17. sillce this AD does not oeed to require the initial inspection oflhat AWL to phase in the inspection. The initial inspection of AWL No, 28-A WL-17 should have been previously accomplished as part of the existing FAA-approved m[tinten'lIlCe program. We also have not included the estimate for AWI.. No. 28-AWL-21 hecause incorporation ofthat AWL has been postponed, as specified i.llRevision 24, dated June 2006, of the MI'D. Request To Clnify Use ofEquivalenl Tools and Chemicals

JAL requests that \ve provide guidelines for using equivalent tools and chemical materials according to tlw component maintenance manuals (CMMs). JAL slates that normally operators can use equivalents withDut FAA approval when the CMM specifies that equivalents may be used. JAL also
stutes that it has receIved further clarification I'rom Boeing specifying thut unless a CDCCL refers lo a certain tool by part number or certain chemicals by 118me, all operator can continue to use equivalent tools or materials according
to the CMMs, We acknowledge the commenter"s request and are \\,:orking with Boeing to provide appropriate flexibility while still ensuring thot it.ems critical for maintaining safety continue to be specifically identified in the CMMs. However, to delay issuance of this AD would be inapprupriate. We agree that when the CMMs allow

use of equivalent tools or chemical materi<lls, operators and repair stations may use equivalents. We h:;lVealready approved the use of the CMMs at the revision levels specified ill Revision March 2008 of the MPD, induding the

use of equivalent tools or chemicals where the CMMs slate equiv<llents are allowed. If the CMM does not allow use of an equivalent, none may be tlsed No "hange to this AD is necessary in this regard. Request To R~vislil Appendix 1 Boeing requests that we revise Appendix 1 at' the NPRM as follows: (1) Heference an additional AT}\. section for AWL No. 28-AWL-02, (2) correct the airplane maintenance manual (AMM) task titles and numbers for AWL No. 28-A WL-09, [3) correct the i\MM task number for AWL No. 23-A WL--J 0, (4) delete certain information from the ATA section for AWL No. ~8·-AWL-21
, and

### Federal Register/Vol. 73, No. gO/Thursday, May 8, 2008/Rules and ReguJatioils 25993

(4)add AMM task titles 'lod [lumbers for AWL No. 21:l-AWL-23. )A1.requests that we update Appendix 1 ofthe NPRM to i[lclude aU AWLs specified ill the MPD, and that

we indicate how to maintain the latest version ofAppendix 1.jA.Lalso requests that we correct the following

error in Appeudix 1 ofthe NPRM: For AWLNo. 21:l-AWL-0'l, change '"SWPM 20-10-15" to "SWPM 20-10-13," We dis<lgreewilh revising the AMM references, since we have deleted A.ppendix·J from this AD. The purpose ofAppendix 1 was to assist operator~ in identifying the AMM lasks that could affect compliance with a CUCCL. However, we have also received several similar comments regardiog the appendices in other NPRMs that address the same unsafe condition on other Boeing ,lirplanes_ Those comments indicate that induding non-required information in those NPRMs has caused confusion. Further, Revision March 2008 ofthe MPO contains most ofthe updated information that is listed in Appendix 1 ofthe NPRM. ThereforR, we haVE: removed Appendix 1 from this AD. Request To Extend the Grace Period [oJ' AWL No. 28-A WL--03 Lufthansa and KLMexpect to have problems accomplishing the initial inspection ofAWL No. 28-AWL-03 within the 2'1-month grace period_ The commellters slate that ifthey do the check ;)nd do not reach the specilled values, then tank entry outside ofheavy maiutenancc would be lleCeSSary,The COlllmcntersalso state that it would be hdpful to plao to do this iuspection durillg an overh(lUI. We infer that the cummcnters Wqll(lst that we extend the grace period fur AWL No, 28-AWI,-03 in Table 1 ofthis AD to allow accomplishing th8 initial inspection during <l

regularly schedlded "D" check (about,Byears]. We disagree with extending the grace Veriod to 6 years. In developing an appropriate compliance time for this <lction, WA considered the safety implications. the rate of lightning strikes in the tleet, and the average age ofthe fleet. In consideration ofthese items, we have determined thilt au initiill compliance time of 1'14months (<IS discussed previollsly) with a grace period of24 mouths will ensure ao acceptable level 01' safety, We have not r.hanged the grace period for AWLNo. 2B-AWL-03 in this regal-d.
Requesl To Extend '-he EXcOolplional Short·Term Extension Qantas Airways requests that we allow exceplional short-term extensions of 10 percent ofthe task interval or 6 months, whichever is less, forAWL tasks. The commenter believes that the exceptional short-term extension of30 days, which is specified ill Revision March 200B ofthe MPD, is too small for AWLtasks having 12-year intervals, The cornmenter states that. as part ofthe Boeing 747 Corrosion Prevention and Control Program mandated by AD 90- 25-05, amendment 39-6790 (5.')FR '19268, November 27, 1990). operators
were givell a provision to invoke exceptional short-term extensions of 1lJ percent ofthe task interval or 6 months, whichever is less. The commenter st.ates that this is a more appropriate magnitude because operators are often permitted onn-time exceptional extensions to maintenance checks aDd tasks ofthis proportion. The commenteI' also states th<ltlimiting the extension period to ,lOdays means that a "0" check can never be extended by more than 3Ddays, which would force operators to do certain AWI. inspections outside ol'a "0" check, We disilgree with thl:!commenter's request because exceptional short-term extensions are, in essence, pre-approved extensions without Seattle ACO review ofthe specifics ofthe situation, We consider that the ability to extend the interval without further approval for 30 days should be suflicicnt for most circumstances. However, ifan operator find~ that it needs an extension longeI' than 30 day~. with appropriate justification one may be requested from the Seattle ACO, or governing regulatory authority. Longer extemions may be granted on a case-by-case basis because,

as Qantas Airways points out. the tusk interval is long, and the FAA is interested in limiting out-of-sequence work. We have not changed this AD in this regard. Request To Add Applicability to Table
1 Lufthall5fl states that the applicability ofAWLinspections should be included in Table 1 ofthe AD. We disagree because the AWL inspections listed in Tahle 1 ofthis AD

are applicable to all airplanes identified in paragraph (cl ofthis AD. \'Vehave not changed this AD in this regard, Requesl To Require Latest Revision of the AMM JALrequests that we revise the NPRM to require incorporation ofthe latest revision ofthe manufacturer's AMM. JALasserts that we have allowed Boeing to inclLldestatements in the Boeing AMM allowing operators lo use certain CMMrevision levels or later revisions. JALstates that, with the exception ofthe CMM, operators cannot find what revision level ofthe AMM needs to be incorporated into the operator's AMM in order to comply with thl:!proposed requirements ofthe NPRM, )1\1,aho states that it Gould take several weeks to incorporate the llumul'acturer's AMM. )AL further requests that we clarify whether it is acceptable to change the procedures in the AMM with 8oeing's acceptance, JALstates that the MPD notes that any use ofparl's, methods, techniques, or pmctices not contained in the applicable CDCCLand AWL inspection must be approved by the FAA onice that is responsible forthe airplaoe model type certificate, or applicable regulatory agency. )ALalso states that the Boeing AMM or CMM notes to obey the manufacturer's procedures when doing maintenance that affects a COCeL or AWLinspection. However, JALbelieves that acr.:ordingto thl:!NPRM it is acceptable to change the AMM procedures with Boeing's accl:!ptance. We disagree with the changes proposed by the commenter. This AD does not require revising the AMM. This AD does require revising YOUI' maintenance program to incorporate llll:! AWLs identified in Revision March 2008 ofthe MPD. However, complying with the AWL inspections or CDCCLs will require other actions by operators induding AMM revisions. In the U.S" operators are not reqllil'ed to use original equipment manufacturer (OEM] mnintenanr;e manuals. Operators may develop their own manuals, which are review(~dilnd accepted by the FAA Flight Standards Service_ In order to maintain that flexibility for operators, most ofthe AWLs contain all ofthe critical information, such as maximum bonding resistances aud minimum separation requirements. The FAA Flight Standards Service will only accept operator manuals that contain all ofthe information specified in the AWLs, so there is no need to require operators to use the OEM maintenance ma'nuals. Reg;uding JAL's request for clarification ofapproval ofAWL changes, we infer JALis referring to the following sentence located in the "Changes to AMMs Referenced in fuel Tank System AWLs" section ofthe NPRM: "A maintenance mnnual change to these tasks mav he made without approval by the Manager, Seattle ACO, through an appropriate FAA principal maintenauce inspector [PMJ) or principal avionics inspector (P.!\l),by the governing regulatory authority, orby using the operalor's standard process fOI revising maintenance maIluals_" If changes Deedto be made to tasks associated with aDAWL,they may be

### 25994 Federal. Registe.rlVol. 73, No. gO/Thursday, May 8, Z008/Rulos iUld 

### Regulations

m<ldeusing an operator's normal proce~~ without approval ofthe Seattle ACO. as long a~the change mai.ntains the information specified in the AWL. For some CUCCLS,it was berleficial to not put all the critical information into the MPD.This avoids duplication of'a large alllount ofinformiltion. In these
cases, the COCCI.refers to <I ~pecific: revision ofthe CMM, U.S. operators are required to use those CMMs. Any changf~sto the CMMs must be approved by the Seattle 1\CO. Request To Revise Nole 2 HOl;ling rl;lqueststhat wrJrevise Note 2 orthe NPRM to clarify the need foran AMOC. Boeing states that the current wording is difficult to follow, and that the note is meant to inform operators that an AMOC to the required MPD ,\WLs might be roquired iJ'al) operator has previously modified, altered, or repaired the areas addressed by the limitations. Boeing requests that we revise Notl;l

2 as follows: ",Add th(1words "according to paragraph (g)" at the end ofthe first sentenCl;l.

.•Replace the words "revision to" with "deviation from" in the last sentence. "'Delete tbe words "(g) or" and "as applicabh~" from the last sentence, As stntod previously, we have clarified the lauguagl;lin Notl;l 2 ofthis AD forstandardization with other similar ADs. The language the r;ommerrter requests that we ch,mgo does not appear in the revised note. Therefore, no additional change to this ADis necessary in this regard. Request To Delete RlJ1erence 10Task Cards All Nippon Airways [ANA]requests that we delete the words "and task cards," unless the task card references

are listed in Subsection Dofthe MFO

orAppendix 1 ofthe AD,Those words ale located in thl;!following sentence in the "Ensuring Compliance with Fuel Tank Systern AWLs" section ot the NPRM: "Operators thaI do not lIse 80eing's revision service should revise their maintenance manuals alld task cards to highlight actions tied to CDCCLsto ensure that maintenance personnel are complying with the CDCCLs." ANAbelieves that ifa task card refors to the AMM, which includes the CDCCLnote, then highlighting the COCCLiLemsis not necessary because they are already highlighted in the AMMand maintenance personnel always refer to the AMM, ANA further states that the applic<lble task card references are not listed in Subsection 0 ofthe MPD, or in Appendix 1 ofthe NPRM;they refer only to the AMM. ANA, therefore, slates that it is difficult to find out or distinguish the affected task card. JALbelieves that tbe proposed requirement regarding the CDCCLsis to incorporate the manufacturer's maintenance manuals into an operator's maintenance manual. Ifthe description ofaCOCCLis missing from the manufacturer's AMM, tben JALbelieves that operators p.renol responsible for the requirements ofthe 1\0. We agree that the task cards might not need to be revised becallse an operator might find that the AMM notes are sufficient. However, we disagree with deleting the reference to the task cards since some operHtors might need to add notes 10their task cards This A.Ddoes not require any changes to the maintenance manuaLs 01' task cards. The AD requires im:orporating naw AWLs into tho operator's maintenance program. Itis up to the operator to determine how best to ellsure compliance with the new AWLs. In the "Ensuring Compliance with Fuel Tank System i\WLs" section ofthe NPRM, we
were only suggesting, not requiring. ways that an operator could implement CDCCLsLntoits maintenance program. We have not changed this AD in this I'egard. Request-To Clarify Meaning ofTask Cards JALrequests thaI we clarify whether "task cards," as found in the "Recording Compliance with Fuel Tank System AWLs" section ofthe NPRM, flleans Boeing task cards only or ifthey also include an operator's unique task cards. 'vVe intended that "tilsk cards" me<ln both Boeing and an operator's unique task cards, as applicable. The intent is to addre% whatever type oftask cards

are used by mechanics 1'01' nHlinlenance, This AD would not require any c:hanges to the AMMs 0,'task cards relative to the CDCCLs.WE!

are only suggesting ways
an operator mighl implement CDCCLs into its maintenance program. No change to this ADis necessary in this regard, Request Tu Delete Reference to Parts Manufat:lurer Approval (PMA) ParIs ANA rGquests that we delete the words "Any use ofparts (including the

use ofpmts manufacturer approval (PMl\) approved parts)," llllless a continuous supply ofCMM specified parts is v'iflrrantedor tbe FAA is open 24 hours to approve alternative parts for in-house repair by the operator. Those words are located in the following sentence in the "Changes to CMMs Cited i.nVue

ITank System AWLs" section orthe NPl{M: 'Any usu ofparts (inclliding the use ofparts manufacturer approvaL [PMA) approved parts). mp,thods, techniques, and practices not contained in thu CMMs needs to be approved by the Manager, Seattle ACO,

or governing regulatory authoriLy." ANA states tbat in some cases the parts specified in the CMMs canIlot be obtained from the parts market or directly from the component vendor, so
an operator is forced into using altemalive parts to kllep its schedule. ANA requests that we direct the component vendor to ensure a continuous supply ofCMMparLsand to direct the component vendor to remedy Cl lack ofparts ifparts arc not promptly supplied. ANA further requests that I,ve direct the component vendor to promptly review the standard parts and allow use ofalternative fasteners and vvashers listed in Boeing D590. ANA asserts that, in some cases, acomponent vfmdor specifies an unr.ommon part to preserve its monopoly. We disagn~ewith revising the "Changes to CMMs Cited ill Fllel Tank System AWLs" section of'the NPRM

. We make every effort to identify potential problems with the parts supply, and we are noLaware ohm)! problems at this time, The impetus to declare overhaul and repair ofcertain t'uellank system components as CDCCLs

arose from in-service pUlIlpfailures th,lt resulted Fromrepairs not dOlle <lccordingto OEMprocedures. We hLive approved the use ofthe CMMsincluding parts. methods, techniques, and practices-at the revision levels specified in Revision March 2008 ofthe MPD.Tbird·party spare parts. such as parts approved by PMA. have not been reviewed. Au operator tIlClY

submit arequest to the Seattle ACO, or governiug regulatory authority, [orClpprovalofan AMOC if sufficient data are submitted to substantiate thaLuse ofan alternative part would provide an acceptable level ofsafety. The CDCCLsdo not restrict where repairs can beperformed, so an operator may do the work in-house as long as Lheapproved CMMs Clre followed, [foperators 1NOU ld Iike to change those procedures, they can request approval ofthe changes_The FAA makes every effort to respond to operators' requests in atimely manner. It'there is a potential for disrupting the night schedule, the operator should include that information in it"srequest. Operators should request approval for thl;!use ofPMAparts and alternative procedures from the FAA or tbe governing regulatory authority in advance in order to limit"schedule

### Federal Register 1

### VoL 73, No. 90I

### Thursday, May 8, 20081 

### Rules and Regulations 25995

disruptions. We have not changed this AD ill this regard. Requesl To Identify Olher Test I::quipment
IAt states that certain test equipment is designated in the l\1POand that additional equipment should also be designated. For example, AWL No. 28- AWL-03 would require using loop resistance tester. part rnnnber (PIN) 906-10246-2 or -3. Therefore, jAL requests that we also identify alternative test equipment, so that opl;lratorsdo not need to seek an AMOC to use other equipment. We disagree with identifying other test equipment. We cannot identify every possihle piece oftest equipment. We el\stll'e thaI some arc listed as recollllllended by tile manufHcturer. With substantiating data, operators C;lll request approval ofan alternati ve tester from the Seattle ACO,or the governing regulatory agency. We have not changed this ADin this regard. Request To Clarify AWL No. 28-AWL02JALrequests that we clarify the intent ofAWLNo. 28-AWL-02. JALstates that Chapters 53-21 and 53-{)1 ofthe Boeing AMM specify doing an inspection ofthe external wires over the center fuel tank according to AMM 28-11-{)O before installing the floor panel over the center wing tank based on AWL No. 28-AWL~ 02. JALalso stales that according to Revision March 2005 ofthe MPD,AWL No. 2/l-AWL-02 contains two limitations: maintaining the existing wire bundle routing and clamping, and installing any new wire bundle per the Boeing standard wiring practices manual (SWPM). Therefore, JAL believes it is not necessary to inspect the external wires over the center fuel tank according to AMM 28-11-00 before installing the floor panel over the center wing tank, unless thaI wire bundle routing and clamping are changed. We point out that AWLNo. 28-AWL02 also contains athird limitation: verifying that all wire bundles over the center fuel lank are inspected according to AWL No. 28-AWL-01, which refers to I\MM 28-11-00 foraccomplishing the inspectiofl. We do not llgreethat the inspection should be 1'8quiredoilly if the wim bundle fUuling and r:lamping

are changed while rlIilintenance is accomplished in t.hearea. Ifany ofthe other bundles have aclamp or routing failure, it must be detected and corrected. After accomplishing the inspection required by AWLNo. 28- AWL-01, an operator would not need to repeat the inspection for another 12 years_No change to this AD is necessary in this regard. Request for Clarification for Recording Compliance With mCCLs jAL requests that we clarify the following sentence: "All entry into an operator's existing maintenance record system forcorrective action is sufficient for recording compliance wilh CDCCLs,

as long as the applicable maintenance manual and task cards identify actions that are CDCCLs."'That sentence is

ESTIMATED COSTS located in the "Recording Compliancl:! with Fuel Tank Svstem AWLs" section ofthe NPRM. Spe'cifically, jAL asks whether an operator must indicate the CDCCLin their recording documents or whether it is sufficient for the recording document to callout the applicable AJ.\1Ms that are tied to the COCCLs. We have coordinated with the FAA Hight Standards Service and it agrees that. for U.S.-registered airplanes, ifthe applicable AMMs and task cards identify the COCCl, then the entry into thn recording documents does not !leed 10identify Ihe CDCCL.However. ifthe applicable AMMs and tasks cards do not identify the COCCL,then they musl be identi ried. OthDrlIlelhods may be accepted by the appropriate FAA PM! nr PAL or governing regulatory aulhorily. Nochange to this AD is nC(;(Jssary in this regard,
Conclusion
We reviewed the relevant data, considered the commcnts received, and determined that air safety and the public interest require adopting the AD with the changes described previously. We also determined that these changes w.illnot increase the economic burden

on any operator or increase the scope of the AD.
Casls ofCompliance
There are about 596 airplanes ofthe affected design in the worldwide fleet. The following table provides the estimated costs, at an average labor rHte ofSBO per work hour, for U.S. operHtors to comply with this AD.

Costper Number

of Action Work hours Parts U,S.-registered Fleetcost airplane airplanes

Maintenance

programrevision

. 8 None $640 57 536.480 initial accomplishment

ofAWL 28-AWL-Q1



## .. 6 None

....... - . 480 57 27,360 Initial accomplishment

ofAWL 28-AWL-Q3

.. 32 None 2,560 57 145,920 Initial accomplishment

ofAWL 28-AWL-10

... ...... 2 None

........ 180 57 9.120

Autbority for Tbis RlIlcmakillg Title 49 ofthe United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106. describes the authority of the FAA Administrator. "Subtitle VJl: Aviation Programs:' describes in more detail the scope oftbe Agency's authority. We are issuing this rulernaking under lhe authority described j[] "Subtitle VII, Part A, Subpart III.Section 44701: GenerHIrequirements," Under that section, Congress charges the FAA with promoting safe flight ofcivil aircnd't in air commerce by prescribing regulations forpractices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope ofthat authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulcmaking action. Regulatory Findings

This AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct I:!ITect on the Slates, on the relationship between the national

government and the States, or on the dislribution ofpower and responsibilities among the various levels ofgovernment. For the reasons discussed above. 

## r certify that this AD: (1)ls not a "significaot regulatory action" under Executive Order 12866. (2) Is not a "significant rule" under DOT Regulatory Policies HndProcedures [44 FR 11034. February 26. 1979), aud (3) Will not' have 11 significant economic impact, positive or negative.

on a substantia! number ofsmllil entities

### 25996 Federal Register/Val. 73, No. 90/Thursday. May 8, 200S/Rules and Regulations

under the criteria ofthe Regulatory Flexibility Act. You can find our regulatory evaluation and the estimated cos!s of complianr.;e in the AD lJackeL
List of Subjccls in 14 CFR Part 39
Air transportation. Aircraft. Aviation safety, Incorporation by reference, Safely. Adoption ofthe Amendmenl

E!I Accordingly. under the authority delegatt:ld to me by the Administrator. the FAA amends 14 CFRpart 39 as follows:

PART 39-A!RWORTHINESS DIRECTIVES

Etll. Thn RUlhority citation for pfll"13!J (;ontinu()s to fCi:ld as follows: Authurity, 49 U.S.c. 106(g), 40113, 44701,
§39.13 [Amended]

E:I 2. The FAA amends §39.13 by adding the following new AD:

2008-10-06 Hoeing: Amendment 39-15512. Do(;ketNo. FAA-2007-28386; Diredoratc Identifier 2006-NM-162-AD.
Effeclive Date (a)This airworthiness directive (AD)is crft.'l.:live

June 12, 2008.

Atreded AUs Ib) None. Applit:abilily Ie)This AD applies to Boeing Muuel 747- 400. ---400D.

<lnd--400Fseries airplanes, (;ertiric<ltetiin ilnycategory; with an origin,l1 standurd airworthiness (;ertifica!a or ol'igill<ll l:lXpOI"l ~;()I'I ifiG<llu 01airworlhioess issLlmi bet'urt:April 12, 2005. Note 1: AirplHnes witb an original stiJl'ldill"d ail'worthine% certi.ficateor crigi [Juloxpol'l curlificattl ofail"w()rlhilles~issued Onor ul\or April 12, 20U[;,mli~tbO:! i:lll"flady in r.:omplii:ln(;c

with the i:lirworthinllSS limitations specified in this ADbt:cauSII thosc limit<ltionswere appLicablnas part of the airworthiness l:crtHi(;ationofthose airplanes. Note 2: This ADrequires revisions to certain operator maintenance documents to include new inspections. Compliance with these inspections is required by 14 CFK 91.403(c). For airpLallesthat have been previously modified. altert.-d.or repaired in the areas addressed by these inspections. tbe operator Illay not be able to accomplish the inspections described in the revisions. In this situation. to comply with 14CFR91.403(c). the operator must reqliest approval for an a1lernative method ofcompliance (AMOC] according to paragraph (I)nfthis AD. The request should include adescription of changes 10thl! required inspections that will enSlire the cootinued operational safely of the airphllle.

Unsafe Condiliun (d) This ADresults from i:l design f(!view ufthe flleltank systems. We an, issuing this ADto pl'Bventthe potenlial fur ignitiun SOllrcu~ inside fueltunh t.:illl~l:Id by li:llent lililul'es, allerations. repairs, 01'maintewlIlce actiuns, which, in cornLJinlllionwilh l1ummable fuel vapors. (;QllidrElsultin a fllel tank explosion und (;onsequent luss ofthe airpLfm,,- Compliance (el You are responsible forhaving the lu;tions reqliired by this ADperrorml:!dwithin the compliance times specified. unless the actions havl:!aLreadybl:!l:!n done.
Service Information Reference [0 The term '·N.evisionMarch 200Bofthe MPD," as used in this AD, means Boeing Temponrry Kevision (TN.) 09-010. dated Man:h 2008. Boeing TK09-010 is published

as Section 9 orthe lJoeing 747-400 MaintenanClJPlanning Data [MPDl DoclUIlent.D621U400-9. Revision March 2008.
Maintenance Program Revision [g)BeforeDe(;ember 15, 200B.revise the FAA.approved m~illienunce program by incorporating Ihe illronnalion in the subsections specified In paragraphs [g][l). [g)(2).ilnd (g)[3)01"

lhi~ AD; [)xceptt.hatthe initial inspm;tions spl:lcii'itJe! in Table 1 ofthis ADmu~t be done atthu compliancE:'times specified in TabLa1. Accomplishing the revision in ur;cordall(;ewith a later revision ofthe MPDis an acceptable method of compliance ifthe revision is approved bythe Mall1l8",r,

Seattle Aircraft Certification Office (ACO).FAA.

TABLE l.-INITIAL INSPECTIONS {lJ Subsection 11. '·AIRWOKT!IlNESS LIMITATIONS [AWLs)-SYSTEMS," of !{c"ision March 2008 of!.h",MPO. 12)Subst.'CtiollC, "PAGE FORMAT: I'UEL SYSTEMS AtKWOKTHINESS UMITATIONS,·' ofKwisioll March 2008 of thll MPD. (3) Snbsection D, ··AIl{WOlfI'HINESS LlMITATlONS--FUEL SY3TEMS." AWLs No. 2~A WL-G1 through No. 28-AWL-23 indusive. nfKevision March 2008 ofthe MPD. As an oplionalllctiOIl, AWls No_28- AWL-24 through No_2B-AWL-29 indusivu.

as idcntifitld in Subsection DofKevision March 2.008ofthe MPD, also may be incurpurawd into the FAA-approved maintenanco prognmL Iniliallnslle(;tiuns ilnd Repair ifNcce.~sary [h) Do the inspections Spf:lCifi'Jd in Table 1 ofthis ADillthe cu,npliant:e lillie spedl'ieri in Tabl!! 1 ofthis AD. Hudrepair allY disc;rcpllnl:y,i,l accordance with Subs[)ctiw) Dofl{evision MardI 2008 ufthe MPD. Tilf:l repair must be dOllebefure furthtJr !light. I\ccomplishillg the uctions required by this paragraph in a(;cordance with a later r!!I'ision ofthe MPD is an acceptable method of compliall(;l:!ifthc revisinll is approved by the MaTlllgllt,

Seattle ACO_Ac(;ompLishingthe inspections identified in Table 1 ofthis AD

as part ofan FAA-approved mainlenanco prOgl"'"dm

before the applicable complia.nce time specifiud in Table t ofthis AD constitutes compLiance with the requirem[)nts ofthis paragraph. Notc 3: For the purposes ofthis AD, ,I detailed inspection is: ·'An intcnsive examination ofa specific lIem, installatiul),

or assembly to detect damage. failure. or irreglilarity. AVllilllblelighting is Jlormally supplclllented with a dirp,clsource ofgum'! lighting ut an intensity deum•.• d appruprialu. Inspection <lidssuch as mirror, magnifying hmses, IItC

.. may be llecessary. Surfac[) cItlaning and elaborate procedures m~yb~ [·l'Iqui]"()d."
Nute 4: I,'o!"

tJw p"rposuS ofthis AD.a special dehliled InSpl:!c1ion is: "All ilJten~il'(I [)xaminatioll ofa sp[)(;illcitem, installation,

or ilssembly to detect damage. faiJuJ"[). or irrcgulilrity. Th" examination is likely to make extlln~ive liStlofsp(Jr.::ialized inspection techniques audlor equipment. Inlricat[) c1l1aning

llnd ~ubstantial access or disassembly pro(;ee!ummay be required."

Grace period Compliance time (whichever occurs later)



### ---'-c:----- Threshold Description AWL No.

28-AWL-Q1

28-AWL-Q3 A detaited inspection of external wires

over the center fuel tank fordamaged

or loose clamps, wire chafing. and wire bundles in contact with the suriace 01the center fueltank. A special detailed inspeclion of the lightning shield to ground termination

on the out·ol·tank luel quantity indicating system to verify functional in· tegrity, Within 144 monlhs since the dale of issuance 

# 0' the original standard airworthiness certificate or the date 01 issuance of the original expon certilicate 01airworthiness. Wilhin 144 months since the dEte of issuance of the original standard air· worthiness certificate 01'the date 01 issuance of the original export certifi· cate ofairworlhiness. Within 72 months after the ellective dale of !his AD.

Within 24 months alter the etlective date ofthis AD.

### Federal Register/Vol. 73, No. gO/Thursday, May B, 

### 200B/Rules and Regulations

TABLE 1.-INrTlAL INSPECTIONS-Continued 

### 25997

Compliance lime
AWL No. Description (whichever occurs later)

Threshold Grace period

28-AWL-l0

....... A special detailed inspection of the fault Within 144 months since the date 01 Within 60 months after 1h, effective

current bornj 01 Ih. fueling shutoff issuance of the original standard air- date of this AD_ valve actuator of the center wing lank worthiness certificate or the date of to verify electrical bond. issuance of the original export certifi· cate ofairworthiness_

Incufllunllion ofAdditional AWLs for Certain Airplanes
OJFor Model 747-400 series airplanes oquipplld with an auxiliary fuel tank: Uei"un:l Df:lctlmbcr1l). 2008. revise the l'AA.approv"d IllainLunUlIcllprogram by im;orporalinl;l AWL:; Nu. 2B-AWL-:-lO. No. 28-AWL-31. find No, 28-AWL-32 "i' Subsection 0 01" I{llvisiun M~lI'chzoot! ul"the tv1PO.Ar;compJiHhing the revision in m;r;ordilnce with a later revision 01'thl:!Ml'n is an acclll-'tabll:!method (II" t;olllpliance ifthe revision is ,-,ppruved by the Milnagllr. Seatlle ACO.

No Alternative Inspections, inspection Intervals, ur Critical Design Configurat.ion Control Limitations (mCel.sj (j) After au:ollll-'lishiog the applicable actions specified in paragraphs (gJ. (h). and (i) of thb; An. no alternative inspedions. inspection inlervals. OfCOCCLs lllilYbe used unh

.. 'Ss the inspections. inlervals. or COCCLs

are part ofil laler revision of }{cvision March 2008 ofthe MPD that is approved by the Manager. Seallle ALU: or unless tha illSp",ctiollS, intervws. or CI)(:CLs uro upprovt!rl as an AMOC in ilccorrlance with thlJ procedures specified in panlgraph (I) of this All
Credit for Actions Done According to Previous Revisions of the I\1PD (k) Actions dOlll::!

beforo tho erl"et:tiv,,"

d<lle DI" Ihis AD ill ac(;ol·dance wilh Section iJ 01' tho U()llingi'47--400 MPD Docullllml. D521U400-9. j{evision 23, dated Man:h 2005: Kevisiull 24. dated June Z006: Revision November 2000: Revision U"e(Jmber 2005; I{evision De':emblOr2006 1{1:}(~lVision May 2007: i{evlsion O(;tober 2007; OfI{evision November 2007; are acceptable for complian(;e with the corresponding rt!qu.irements of paragr-dphs Ig) and (h) of this AD.
Alternative Methods ofCompliance (AMOCs) (1)(1)The Manager. Seattle ,\CO. h(ls the authority to approve AMOCs for this AD. if requesled in accordance with the procedures found in 14 CFJ.t39.19. (2) To ft.'quesl
~different method of compliance or a dilIerent compliance time fur Ihis AD. follow the procedures in 14 CFJ.t 3'1.19, I:lcforeusing any approved AMOC on any ~irplan" tll which the AMOC ~ppJil:ls. nOlify your appropriate principal inspnctor [I'll in thu FAA Flight Standards Oistril;t OITicl:l {I,'SODL01"

liickiug a PI, your 10l;al I'SUO. Mall:lrial Incorporated by Referenl:1': (m) You musl use Uoeing Temporary Revision 09-010, dllted March 2008. to the Hoeing 747-400 Maintenanl;l:l Planning Datil [MPD) Document. DG21U400-9. 10do the actions required by lhis AD, LLfilesH the AD specifies othl:lrwls~. LJouing'I'Hll1pOr,uy Revision 09-010 is PLlblish",d as Se(;lion !) u1" the Boeiog 747-400 Mainlellance Planning Oala (MPD) Docullll;ul. D621U400-9. I{evlslon March 2008. (1) The Director of th!~Federal Kegister approved the incorporation by reference of this service information under 5 U.S.c. 552(aJ and 1 CFR purtSt. (2) For service information identified in this AD. contact Hoeing Commercial Airpfanes, 1'.0_ Box 3707. 5eaule, Washington 98124-2207. {3JYou may review cupies oflhe service information incorporatlld by rderence at the FAA. Tmllsport Airplane Directorate, 1601 Lind Avenue SW

.. Renton. Washington; or at the Nalion'll Archives and Records Administration (NAI{A). For Information on the ilv<lilability ofthis material at NARA, call 202-741-6030, or go to: hllp:/1 ""''lv.uTChivcs.govlfcdmtll jegislerl cod~ _ofJederulJ08uloi iOllS/ ib,._/ocaJions.h/11Jl.
Issued in Kenton. Washington. OilApril 2B. 2008. Ali Hahrami, ,'vluJluge1", Transport AirpicllliJ Directoratc, Aircrajl CVl'lijication Sel'vice. [F}{Oor;. E8-9897 Filer!S-7-08; B:45 ami

BILLINGCOOE 4'Jle--13-f'

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Dockel No. FAA-2007-Q1J45; DIrectorate Identifier 2007-NM-169-AD; Amendment 39-t5501; AD 2008-09-201

RIN212Q-AA64

Airworthiness Directives; Boeing Model 747-200F, 747-300, 747-400, and 747-400D Series Airplanes
AGENCY;Federal Aviation Administration (FAA), DOT. ACTION:Final rule. SUMMARY; We are adopting a new airworthiness directive (AD) for certain Boeing Model 747-200F, 747-300. 747- 400, and 747-400D series airplanes. This AD requires a detailed inSpllctiun
to detect missing fasteners from the sheOr dip 1:It

a cert[)in stub frunliJ 10 auxiliary sill joint, and ~lpplicable related illvesligative and corrective actions. This AD results from repOrts of missing fllsteners from the shear clip of the stub frame to auxiliary sill joiut and cracking of the adjacent exlerior skill and internal doubler. We are issuing this AD to ensure that fasteners are installed in the sbear dip oflhe stub frame to auxiliary sill joint. Missing fasteners could result in cracks in Ihe adjacent exterior skin and internal doubler, which can propagate and result in loss of structural integrity and sudden in-flight decompression of the airplane.
DATES:This AD is effective June 12, 2008. The Director of the Federal Register approved the incorporalion by reference ofa cert<lin publication listed in this AD

as ofJune 12, 2008_ ADDRESSES: For serviC(J inforrnalion identified ill this AD, contact Boeing C0n1111erciul Airplanes, P.O. Box 3707, SeCittle, Washington 98124--2207.
Examining the AD Docket
You may examine the AD docket on the Internet at http:// wLVw.regulolions_gov; or in persoll at the DOl:ket Management Facility between 9

a.m. and 5 p.m., Monday through !·'riday, except Federnl holidays. The AD docket contains this AD, lhe regulatory evaluation. any comments received. and other information_ The address for tht! Docket Office (telephone B0D-647-5527) is the Document Management Vacilily. U.S. Department. of Trans pori ation. Docket Operations, M-30, Wesl Building Ground Floor. Room W12-140, 1200 New Jersey Avenue SE.. Wl1shington, DC 20590. FORFURTHERINFORMATION CONTACT:Ivan Li. Aerospace Engineer. Airframe Branch, ANM-120S, FAA. Scutt In Aircraft Cert.ificalion OUice. 1601 Lind