25970 Federal Register/VoL 73, No, gO/Thursday, May n, 200H/Rules fwd RegulaLions

by Ihis AD. w"lu~stile AD sp',eiries

otbtJrwistJ.

(1) TI1(lDir~ctor of U'OF\ld~l'<llI{l,gis\or

approvl!d lh!!il1l.:DrpOI·"lionhy l'of~rellcc of

Suow EngiJlep.ringCo. Servkll Le\ler 1t253.

RI."'.C. dated '\]Jri! 17. 2008: Snuw

Engin!>CringCo, Sen'ice Lclter #253. Hev. 1:1.

dated November 30.2007: aud Suow

Engineering Co. Snrvit.:l:!I.t!(l(lr#253 KIl". A.

dated Octuber 15. 2007. unutlr 5 U.S.c. :i:';2Ia)

and 1 eFR part 51.

(2) On August 10, 2007 (n FR 36863, July

6. 2007). the Directur of the FedcT'~1Kegister

approved the incorpOT',lliollby mference of

Snow Engin!!t'ring Co. Servicc Leiter 1t253,

rl:!visedJanuary 22. 2007.

(3) For service information identifit!d in

this AD. contact Air Tr,l(:tor Inc.. P.O. Hox

485. Oloey. Texas 76374; telephone: (9••0)

564-5616: fax: (940) 564-5612.

(4) You may review copies at the FAA.

Central Region. Omce of lhe Regional

Counsel. 901 Locust. Kansas City. Missouri

6~106; or at the National Archives and

Records Administration INt\RA). For

information on the availability of this

materia! at NARA. (;<111202-741-6030.or go

to hit p:!/www.orchives.gov/fcdf.lroCregiSler/

code_ofJL'!IcroCrcgu/o/ions/

ibr_Iocol/ulls./llm/.

Issued in Kansas City. Missouri. on April

30.2006.

Palrick R. Mullen,

Acting Managcr. Small Airplane Direclorote.

Aircraft Certification Service.

WI{Doc. £8-9925 Filnd 5-7-08; 8:'ili amI

BILUNG COOE 491ll--13-P

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Dockel No. FAA-2007-28363; Directorate

Identifier 2006-NM-180-AD; Amendment

39-15515; AD2008-10-09]

RIN2120-AA64

Airworthiness Directives; Boeing

Model 737-100, -200, -200C, -300,

--400, and -500 Series Airplanes

AGENCY:Federal Aviutioll

Administration (FAA). DOT,

ACTION:Final rllln.

SUMMARY:We are adopting a new

airworthiness directive (AD) for all

Boeing Model 737-100. -200, -20UC,

-300. -400. and -500 series airplanes.

This AD requires revising the FAAapproved maintenance program to

incorporate new airworthiness

limitations (AWLsl for fuel lank systems

to satisfy Special Federal Aviation

Regulation No. 88 requirements. This

AD also requires the initial inspection of

a certain repetitive AWL inspection to

phase in that inspectiun. and repair if

necessary. This AD results from a design

review ufthe fuel tank sy~tem, We ~re

issuing this AD to prevent the potenti~l

for ignition sources inside fuel hlllks

caused by latent failures. alterations,

repairs, or maintenance actions, which,

in combination with flammable fuel

vapors, could result in a fuel tank

explosion and consequent loss of the

airplane.

DATES:This AD is effective June 12.

2008.

The Director of the Federal Register

approved the incorporation by reference

of a certain publication listed in this AD

as of June 12. 2008.

ADDRESSES:For service information

identified in this AD, contact Boeing

Commercial Airplanes. P.D. Box 3707,

Seattle, Washington 98124-2207.

Examining the AD Docket

You may examine the AD docket on

the Internet at http://

www.regu/ations.gol/;orin perSOn at the

Docket Managemenl Facility between 9

a.m. and S p.m .• Monday through

Friday. except Federal holidays. The AD

docket contains this AD, Ihe regulatory

evaluation, any comments received. and

other information. The address for the

Docket Office [telephone 800-647-5527)

is the Document Management Facility.

U.S. Department of Transportation.

Docket Operations, M-30. West

Building Ground Floor. Room W12-140.

1200 New Jersey Avenue, SE.,

Washington, DC 20590.

FORFURTHERINFORMATIONCONTACT;Sue

Lucier, Aerospace Engineer, Propulsion

Branch, ANM-140S, FAA, Seattle

Aircraft-Certification Office, 1601 Lind

Avenue,·SW. Renton, Washington

88057-3356; telephone (425) 917-1WI8;

fax (425) 917-6590.

SUPPLEMENTARYINFORMATION:

Discussion

We issued a notice of proposed

rulemaking (NPRM) to amend 14 erR

part 39 to include an airworthiness

directive (AD) that would apply to all

Boeiug Model 737-100, -200, -zooe.

-300, -400. and -500 series airplanes.

That NPRM was published in the

Federal Register on July 6, 2007(72 FR

36907). That NPRM proposed to require

revising the FAA-approved maintenance

program to incorporate new

airworthiness limitations (AWLs) for

fuel tank syslems to satisfy Special

Federal Aviation Regulation No. 88

requirements_ That f\1J>RMalso proposed

to require the initial inspection of a

certain repetitive AWL inspection to

phase in that inspection. and repair if

necessary.

A\:1ions Since NPRM Was Issued

Since we issuod the NI-'l\M, Boeing

has issued Revision March 21108of the

737-100/Z00/Z00C/300/400/S00

Airworthiness Limitations (AWLs) and

Certification Mainten(lnr:e Requirements

(CMRs), D6-38278-CMR (hereafter

referred to as "Revision March 2008 of

Document 06-3827B-el\1R"). The

NPRM referred to Revision May 2006 of

Document D6-38278-el'vlR as the

appropriate source of service

information for accomplishing the

proposed actions. Revision March 2008

uf Document D6-38278-CMR. among

olher actions. includes the following

changes:

• Removes the repetitive task interval

of 36.000 flight cycles from AWLs No.

28-AWL-ol and No. 28-A WL--03.

• Revises the task description for

AWl. No. 28-AWL-01to harmonize it

with AWL No. 28-AWL-02 by removing

references 10 certain station munbers.

• Revises AWL No. 28-AWL-03to

reflect the uew maximum loop

resistance values associated \,,-ilh the

lightning protection of the

unpressurized fuel quantity indicating

system (fQ!Sl wire bundle installations.

Accordingly. we have revised

paragraphs (fl. (gl. and (h) ofthis AD to

refer to Revision March 200<1of

Document Do-38278-CMR. We also

have added a new paragraph (j) to this

AD specifying that actions done bdore

the effective date ofthis AD in

accordance with Revisions May 2006

through November 2007 of Document

DG-38278-CMR are acceptable for

compliance with the corresponding

requirements of paragraphs (g) and (h)

of this AD.

We also have removed reference to

3['i,OUOtotal flight hours from pamgmph

(h)(1) of this AD and revised the inilial

tlueBhold for accomplishing AWL No.

28-A WL-03 to within J 20 monlhs since

the dille of issuance of the original

standard airworthiness certificate OJ'the

di:lte of issuance of thB original export

certificale of airworthiness.

Opemtors should note that paragmph

(g) of this AD requires only

incorpor(lting AWLs No. 28-A WL-Ol

Ihrough No. 28-A WL-20 inclusive for

Model 737-100, -200, and -200C series

airplanes, and AWLs No. 2B-A WL-01

through No. 28-A WL-19 inclusive for

Model 737-300. -400. and -500 series

airplanes, Revision September 2006 of

Document D6-38278-CMR added AWL

inspections of the fuel boosl pump auto

shutoff system for the cenler aod

auxiliary fuel tanks (specified as AWLs

No. 28-A\'\'L-20 and No. 28-AWL-21

for Model 737-300, -400. and -SOD

series airplanes. and AWLs No_ 28-
Federal Register/Vol. 73, No. gO/Thursday, May 8, 200B/Rules and Regulations 25971

AWL-21 and No. 28-AWL-22 For

Model n7-100. -WO, and -200G serie~

airplanes). Revision November 2007 of

Document D6-38278-CMR added <In

AWL inspection of the boost pump

ground fault interrupter (specified as

AWL No. 28-AWL-22 for Model 737-

300. --400, and ··500 series airplanes,

and AWL No. 28-A WL-23 for Model

737-100. -200. and -ZOOCseries

airplanes). We might issue additional

rulemaking to require the incorporation

of those AWLs. I-Iowevor,as an optional

Ilttion, operators may incorporate those

AWLs as specified in paragraph (gl of

this AD.

Other Changes Made to This AD

For standardization purposes, we

have revised this AD in the following

ways:

• We have added a new paragraph lil

to this AD to specify that no alternative

inspections, inspection intervals, or

critical design configura lion contra!

limitations (CDCCLs)may be used

unless they arc part of a later approved

revision of Revision March 2008 of

Document D6-38278---CMR,or unless

they are approved as an alternative

method ofcomplinnce (AMOC).

Inclusion of this paragraph in the AD is

intended to ensure that the AUmandated airworthiness limitations

changes are trealed the same as the

airworthiness limitations issued with

the original type certificate.

<> We have revised Note 1 of this AD

to clarify that an operator must request

approval for an AMOC ifthe operator

cannot accomplish the required

inspections because an airplane has

berm prroviollsly modified, altered, or

repaired in the areas addressed by the

required inspeclions.

• We have revised paragraph (hl of

this AD to specify that accomplishing

AWLNo. 2B-AWL-03 as part of an

FAA-approved maintenance program

before the applicable compliance time

constitutes compliance with the

applicable requirements of that

paragraph.

<> We: have deleted Appendix 1 and

Appendix 2 from LhisAD.sillce

Revision March 2008 of Document 06-

38278-CMR already contains most of

the updated information that is listed ill

those appendices of the NPRM.

Commenls

We gave the public the opportunity to

participate in developing this AD. We

considered the comments rel..'eivedfrom

the Fivecommenters.

Request To Revise the Loop Resistance

Values for AWL No. 28-AWL-03

Uoeing, KLMRoyal Dulch Airlines

{KJ.M},and Lufthansa state thaI the loop

resistance values for AWL No. 28-

AWL-03 specified in Revision May

2006 of Documenl OG-38278--CMf{are

going to be revised, since those values

are relevant for production airplanes.

The commenters also slate that the

revised valucs will be more

representativc oftne expected values for

in-service I,lirplanes. Boeing points out

thal, according to paragrilph (h) or the

NPRM, the revised values should be

able to be used in accordance with a

later revision of the CMR if the revision

is approved by the Seattle Aircraft

Certification Office (ACO), FAA.

We agree that operators may use the

revised loop resistance values for AWL

No. 28-AWL-D3 in accordance with

Revision March 2008 of Document D6-

38278-CMR. As stated previously, we

have revised this AD accordingly.

Ruquesl To Revise intervals for Certain

AWL Inspections

KLM, on behalf of several operators,

requests that we review a 45-page

proposal to align certain airworthiness

limit<ltion item (ALl)intervals wHh tbe

applicahle maintenance significant item

(MSl) and enhanced zomll analysis

procedure (EZAPl intervals for Model

737,747,757,757. and 777 airplanes.

The recommendations in that proposal

ensure that the ALl intervals align with

the maintellance schedllles of the

operators. Among other changes, the

proposal recommends extending certain

AWL inspection intervals from ]0 yearsl

36,000 flight cydes to 12 years for

Model 737-100,-200,-300,-400. and

-500 series airplllncs.

Lufthansa and the Air Transport

Association [ATAl, on behalf of its

member U.S. Airways, both note an

inconsistency between the inspection

interval specified in Revision May 2005

or DocLUTIent1J6-3B278-CMR ilnd the

wmpliance threshold specified in

paragraph (b){l) of the NPRM. The

NPRM specifics accomplishing the

initial inspection within 36,000 !otal

f1ighthours or 120 months since the

date of issuance of the original standard

airworthiness ctlrtificate or the date of

issuance of the original exporl

certificate of airworthiness, whichever

occurs first. However, Revision May

2006 of Document D6~38278-eMR

specifies fl repetiti ve interval of 36,000

lotall1ighl cycles Of 120 months.

whichever occurs firs!. U.S. Airways

requests we verify whether the initial

inspection interval should be in units of

f1ight cydes or flight hours_

We disagree with KLtvrsrequest to

extend cerlain AWL inspection intervab

to 12 years. However. as stated

previously, we have deleted the 36.000-

total-flighi-houf parameter from

paragraph (h)(1) ofthis AD to

correspond with the task interval for

AWL No. 28-AWL-03 as specified in

Revision Miuch 2008 of Document D6-

3-8278-CMR.In developing an

appropriate compliance time for this

«cUon. we considered the urgency

associated with the subject unsafe

condition and the practical (lspeet or

accomplishing the required actions

within a period oftime that corresponds

to the normal scheduled maintenance

for mas! affected operators. However,

according 10the provisions of paragraph

(kl of this AD, we might-approve

requests to adjust the compliance time

if the request includes datil that prove

that the new compliance time would

provide an acceptable level of safety.

Request To Revise Note 1

Boeing requests LIlatwe revise Note 1

of Ihe NPRM to clarify the Ileed rOfim

AMOC. Booing stales that the current

wording is difficult to follow, and that

the note is meant to inform operators

that an AMOC to the required AWLs

might be required if all operfltor has

previously modified, altered, or repuired

the areas addressed by the limitations.

Boeing requests that we revise Note 1 as

follows:

• Add the words "according to

paragraph {gr' at the end of the first

sentence.

<> Replace the words "revision to"

with "deviation from" in the last

senhmce.

•• Delete the words "(g) or" und "as

applicable" from the last sentence.

As stnted previously, we have

clarified the language in Note 1 of this

AD for standardization with other

similar ADs. The language the

commenter requests' that we change

does lIot appear in the revised notc.

Therefore. no additional change 10this

AD is necessary in this regard.

Request To Extend the Grace Period for

AWL No. 28-A WL-03

KLMexpects to have problems

accomplishing the initial inspection of

AWL No. 28-AWL-03 wit.hin the 24-

month grace period. The commenter

states that if it docs the check and does

not reach the specified values, then tank

entry ontside of heavy maintenance

would be neceSS<lrv,The commenter

aiso slates that it \~ould be helpful Lo

plan 10do this inspection during all

overhaul.

We infer that KLMrequests that we

extend the grace period for AWL No.
25972 Federal Register / Vol. 73, No. 90/ Thursday, May 8, 2008/Rules and Hegulations

28-A WL-03 in paragraph [h) of this AU

to allow accomplishing the initial

inspection during 11 regularly scheduled

"0" check [about 6 years). We disagree

with extending the grace period to 6

years. In developing an appropriate

complillnCe time for this actioll, we

considered the safety implications, the

rate of lightning strikes in the !"leel,and

the average age of the Deet. In

consideration of these ilems, we have

determined that ao initial compliaoce

time of 120 months (as discussed

previously) with a grace period of24

months will ensure an acceplable level

of safety. We have oot changed the grace

period for A\II'LNo_28-A WL-Q3 in this

regard.

Request To Add Applicability 10

Paragraph [g)

Lufthansa slates that the applicability

of the AWL tasks should be included in

the AWL table of the AD.

We infer the Gommenter requests that

we indude the app!icability for AWL

No. 28-A Wr.-0::1in paragraph [g) of this

AD_[The comm(;ot~r mad(; the same

request for a similar NPRM, which

contained an "AWL table.") We agree to

add the airplane applicability to

paragraph (g) oflhis AD because AWL

No. 28-AWL-03 only <lppliesto

airplan8s on wbich cfJrtain design

changes have been incorporated. We

have revised paragraph [g) of this AD

accordingly.

Request To Clarify Need for AMOCs

The ATA, on bahaH 01'its member

U.S. Airways, requests that we clarify

whether operators must obtain AMOCs

for AWls that are not applicable to their

airplanes. U.S. Airways also requests

that we clarify that some of the items

idenlitled in Appendix 2 of the NPKM

might not be flpplicflble to flll Model

737-300. -400. and -500 series

airplanes. U.S. Airways states that it

will not be able to comply with certain

AWL inspections or CDCCLsbecause it

has nol incorporated the relevant

service bulletins identified in Revision

May 2006 of Document D6-38278-CMR

on several of its airplanes.

Document D6-38278-CMR contains

an applicability column that identifies

the airplaoc configuration to which the

AWL applies. The AWL is required only

fOfthose airplanes that have that

configuration_ If the applicability

column identifies a service buHetio.

then the operator would not need to

adhere to the AWL until the airplane is

modified in accordance WiUlthat

service bulletin. There is no need to

obtain an AMOC fOfairplanes that have

not been modified. We agree that some

of the items identifiod in Appendix 2 of

thl:\NPRM might not b~ Rpplicable to all

Model 737-300. --400, and -500 series

airplanes. However, no change to this

AD is necessary in this regard, since we

have deleted Appendix 2 from this AD.

Rilquest To Clarify if Latest Revision uf

Ilucumcnl D6-38278-CMR is Required

The ATA, on behalf of its member

U.S. Airw<tys,requests that we clarify

whether the latest revision of Document

O£-38278-CMR will be incorponlted

into lho final rule. The commenters note

that Boeing has published a later

revision of Document 06-38278-cMR

than the one referenced in the NPR.\1.

We have revised tbis AD to refer to

the latest revision of Document Dfi3B278-CMR because paragraphs (g) and

[h) of this AD allow the use oflaler

approved revisions of that document.

That document has been revised since

then to include additional AWLs

IIssociated with the incorporation of

Gertain design changes. As stated

previously, we might require those

design changes and associated AWLs

with separate rulemaking actions, but

ESTIMATED COSTS

operators may choose to incorp0ri1te the

new AWLs beFore thon.

Request To Clarify Revision Date of

Document D6-38278--CMR

The ATA, on behalf of its member

U.S. Airways, notes that the "Changes to

Fuel Tank System AWLs" and

"Exceptional Shorl-Term Extensions"

sections of the NPRM refer to Revision

M,;!fch2006 of Document 06-38278-

CMR. U.S. Ainvavs believes that the

correct revision date should be May

2006 to match the rtlst of the NPRM,

We infer the commenters request that

we change the revision date to May

2006. We agree that the NPRM should

have referred to Revision May 2006 of

Document Oij-38278---CMRbecause that

revision, and other later approved

revisioos, are the subjact or this AD.

Revision March 2005 of Document 06-

38278-CMR was originally included in

the NPRM because the AWLs for fuel

tank systems were first incorpordted in

that document. However. we have not

changed this AD since the paragraphs

that lhe commenters refer to are not

retained in the final rule_

Conclusion

We reviewed the relevant data,

cOllsidered the comments received. and

dettlrmined Lhat~ir safety aod the

public interest require adopting the AD

with the changes described previously.

We also determined that these changes

will not increase the economic burden

on any operntOl' or increase the scope of

the AD.

Costs of Compliance

There are about 2,::137airplanes of the

affected design in the worldwide Ileel.

The following table provides the

estimated costs. ol an avernge labor fatc

of S80 per work hour, for U.S. operators

to comply with this AD_

Cost per air· Numberof

Action Workhours Parts U.S.-registered Fleetcost plane airplanes

Maintenanceprogramrevision ------- ....-_. ... ._-------_ ..... B None ........... 5640 672 $430,080

Inspection- --.- ......- ...... ..... _ ..... B None ........... 6'0 672 430,080

Authority for This Rulemaking

Title 49 of the United States Code

specifics the FAA·s authority to issue

rules on ,lviation safety. Subtitle I.

section 106. describes the authority of

the FAA Adminjstrator. "Subtitle VII:

Aviation Programs"· describes in more

detail the scope of the AgenGY's

fluthority.

We are issuing this rulernaking under

the authority described in "Subtitle VII,

Part i\, Subpart III. SeGtion 44701:

General requirements." Under that

~eclion, Congress charges the [o'AA with

promoting safe night or civil aircraft in

air commerce by prescribing regulations

for practices. methods. aud procedures

the Administrator finds necessary for

safety in air commerce. This regulation

is within the scope of thaI authority

because it addresses an unsafe condition

that is likely to exist or develop 011

products identified in this rulcmakiog

action.

Regulatory Findings

This AD will not have federalism

implications under Executive Order
Federal Register I Vol. 73, No. 90I Thursday, May 8, 20081 Rules and Regulations 25973

1::1132.This AD will not have a

Sllbstantiai direl:! effect on the Slales, on

the relationship between the national

government and 1he Stales, or on the

distribution of power and

responsibililies among the various

levels of government.

For the reasons discussed above, I

certify that this AD:

(Ills not a "significant regulatory

action" under Executive Order 12866,

(2) Is not a "significant rule" under

DOT Regulatory Policil;!s and Procedures

(44 FR 11034, February 26, 1978), and

(3) Will not have a significant

economic impact. positive or negati've,

on a substantial number of small entities

under the criteria of the Regulatory

Flexibility Act.

You can find our regulatory

liWaluatioll and the estimated cus!s of

compliance in the AD Docket.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation

safety, Incurporalion by reference,

Safety.

Adoption ofthe Amendment

I'llAccordingly, underlhe authority

delegated 10 me by Ihe Administrator.

the Fi\A amends 14 CFR part 39 as

j'ollov\i~:

PART 39-AIRWORTHINESS

DIRECTIVES

.1.The authority citation for part 39

continues to read as follows:

Autbority: 49 U,S.c. 106[g),40113, 44701.

§39.13 [Amended]

.2. The FAA amends §39.13 by adding

the following now AD:

2008-10_mt Uo~in:::;AmsndmenI3g-1~51S.

Oocket No. I'AA-2007-283i!3:

Directorate Identifier ZOO6-NM-180-AD_

F.ff~ctiveDate

{a)This airworthiness directive (AD)is

errective June 12. Z008.

Affected Ails

(bJ NOIll.!.

Applicability

(c}This AD applies to all Hoeing Model

737-100, -zOO,-200C, -300, -400, and -500

series airplanes, cnrtificalcd in allYcategory.

Note 1: This AD rtlquirtls revisions to

certain operalor maintenance documents to

include new inspections. Compliance with

these inspections is required by 14 CFR

91.403(cj. For airplanes that have been

previously modified, altel'lJd. or repilired in

tile IJre,IHuddre~~cd by these inslJllcllons, the

operator may nol be abl~ 10accomplish lh~

inspections described in lhe revisions. In this

situation. 10cumply wilh 14CFI{91.403{c).

lhe operator must request approval for an

alternative method of eompliance (AMOC)

according to parilgraph (k) of this AD. The

reqlle~t should include a description of

ch<ll1geslo Lliereqllil'ed inspections Lhillwill

ensure the contillued operational safeLyor

the airplane.

Unsafe Condition

(d) This AD results froUla design review

of the fuellallk systmus, We are issuing this

AD Loprevonl the pOlential for ignition

sources inside fuel Lankscaused bv latent

failures. alterations. repairs, or maintenance

aclions. which, in combination with

flammable fuel vapors, could resulLin a fuel

tank l:lxplosiolland consequent loss of the

airplane.

Compliance

(e) You are responsible for having the

actions required by this AD perfonned within

the compliance Limesspecified, unless the

actions have alniildy been done.

Service Infilrmation Reference

[I)The Larm"Revision March 2008 of

Document D6-38278-GMR." as used in this

AD, means !Joeing 737-tOO/200/200Cf3001

400/500 Airworthiness Limitations IAWLs)

and Certification MaIntenance Requirements

(CMKs),D6-38278-{;MK ROl"isionMarch

2001l.

Maintenancll Prollram Revision

19}Before December 16, 2008, revise the

FAA.approved mai/ltenancl:l program 10

im;orporate the information specified in

)l:u'agrflph(g)(l) or (gI(2)of this AD, as

applicable: excepl thal the initial inspElction

required by paragraph [hl of \Jlis AD must be

done allhe applicable compliance time

specified in that paragraph.hccomplishing

the revision in accordance with a later

revision of Document D6-38278-GMR is an

acceptable method of compliance if the

revision is approvad by the Manilger, SeajJle

Aircraft Certification Office IACO), FA,\.

{l} For Model 737-100. -200, and -zOOC

series airplanes: Section C. "FUEL SYSTEMS

AIRWORTHINESSUMITATIONS,"

induding AWLs No. 28-AWL-Ql through

No, ZfI-AWL-20 inclusive, of Rcvisioll

March 2006 ofOoCliment D(l-3827S-eMK

As an optional action. A\'VLsNo. 28-AWL21 through No. z8-AWL-23 inclnsive. as

idllntified in Section C of Rc\'ision March

2008 of DocuwenLl)6-38276-G."lli., also may

bElincorporated into the FAA-approvtld

mainlenanCl:lprogram.

(2) For Model 737-300, -400, and -500

series airplanes: Section C, "FUEL SYSTEMS

AlRWORTI1LNESSLlli1rrATIONS,'·

including AWLs No. 28-A WL-01 through

No. 28-AWL-19 inclusive, Revision March

2008 of Document D6-38278-GMR, As an

optional iKlion, ,\ WL~No. 28-AWL-ZQ

through No. 28-AWL-22 inclusive. as

identified ill Section C of Revision March

2008 of Documenl D6-38278-CMR, also may

be incorporated into the FAA,appro\'cd

maintenance program.

Iniliall"~IH~ction and Rel'air ifN"cus~ary

(It) For the airplunes identified in tbe

"Appli<.'ability·· column of AWLNo. 28-

AWL-Q3 of Section C of Revision March

2008 of DocumentlJ6-38276-CMR: At the

later of the compliance times specified in

paragraphs (h)(l} and ihl[2) of this /\0, du a

special detailed inspHclion of tile lightninl\

5hield lo ground l<ll1lJin.\tionon Lhe[Jut-ut'-

lauk fuel quantil)' indil;ution syslem (l'QISJ

wiring to verify functional integrity. in

accordance with AWLNo. 28-.'\ WL-Q3 of

Soction C of Revision March 20011of

Document D6-38278-CM.R If any

dlscrepancy is found during the inspection,

repair the dis~repan~y hefore furllWr nigh I in

accordance with AWLNo. 28-A WL-Q3of

Section C of Revi~ion March J,001lof

Documeot D6-38278-CMR. Accomplishing

the actions required by this paragraph in

accordauce with a later revision ofUoe-limen!

UG-38278-CMl{ i~an ut:ceptable method of

compliance if the revi.sinn is <lppro\'ed by the

Manager, Seattle ACO.iAccomplishing AWL

No. 28-A \VL-Q3 as-part of an FAA-<lpproved

maintenance program btlfofe the applicable

compliance time specified in panlgraph (h)[ll

or (hJ(2) of LhisAD constitutes compliance

with the requirements of this pU.mgraph.

Noh~2: For Ihe purpOSIl~of this AD, ~

special detailed inspection is: "An intensive

examination of a specific item, installation,

or assembly Lodetect damage, faHure, or

irregularity. The examination is likely 10

make extensive us", of speciali:.:ed insp()t:tion

techniqu~s and/or equipment. Intricate

cleaning and ~ubshmtiJlJaccess Dr

disassemhly procedure may be required."

(t} Within 120 months sinca the date of

issuance of the original standard

airworthiness certification or the dale of

i~suancfl of tho origi!lill flxporll:ertiuc,lte of

airwtll'l.hiness,

(2) \I.,'ithin 24 months after the effective

date of Ihis AD.

No Alternative Inspections, Inspection

Intervals, or Critical Design Configuration

Conlrol Limitations [CUCCLs)

[i) After acr.omplisbing the actions

specified in paragraphs [g) and lh) of this AD.

no alternative inspections, inspection 1.

intervals, or CDCCLsmav be used unlllSSthe

inspections, intervals, or·CDCCLsare parTOf

a later reVision of Revision March 2008 of

Document D6-38278-CMR thlll is apPJ,oved

by the Manuger, Seattle ACO: ur llOlus~'the

inspections, intervals, or CDCCLsareappro\'ed. as an AMOC in accordam:e with

the procedlltl:ls specified in pardgrnph [k) of

this AD.

Crudit for Actions Done Accurding to

PrevIous Re\'biorls of the Service

Information

OJ Actions done before the eff<!CIivlldate of

this AD in accordance with the Boeing 737-

1001200/200C/JOO/400/500 Airworthiness

Limitations (AWLs] ilnd Certification

Maintenance Hequil'elllents (CMRs).06-

38270-GMR, \{evisiun May 2006: Revision

September 2006; or Revision November Z007;

are acceptable for eompliance with the

corresponding requirements of paragraphs (g)

2nd (11)of this AD.

Allernative Metbods of Coml'liance

(AMOCsJ

[k)(l} The M,wager. Seallie ACO. has the

anthority to approvtl AMOCs for this AU, if

requested in accordance with the proc"dllres

found in 1'1CI'R 39.19.
25974 Federal Register/Vol. 73, No. gO/Thursday, May B, 200B/Rules and Regulations

(2) To request ~difforolltlllethud of

compHance or a different compliance time

for this AD. folluw the procedures in 14CI'K

J9.1~. Bo'!fort:using any approved AMOCon

any airplane Lowhi(;h the .•\MOC applies.

notlfy your appropriate principal inspoclur

{I'll ill the FA!\.Flight Standards Distrid

Offi(;e[FSOU).or la(;kinga PLyour local

F$DO.

MateriaLtn(;orporah~dby R'lference

(I) You llJlI~luse !:loeing 737-100/200/

ZIJOC!300/400/500Airwmthinoss Limitations

(AWLs)findCl~flmCil\iol\Moinl~mlllC(l

I{(~'!llil'em••nts (CM1{s).DG-3!l278-CMR,

Ruvisioll March 20GB,to do tlll:!~CIiOllS

r~qllil"(ldby this AD. 1I111••ss thflAD spflcifies

otherwiMl.

(1)Th••Director of tll(!FcrieralRl:!'tiister

C1pprovedthe incorporation by refewnce of

this service information under 5 U.S.C.

552(a)aud 1 CFRpart 51.

(21For service information identified in

this I\D. r.ontact BoeingCummcrcial

Airplanes. 1'.0. Box 3707. Seattle.

Washington 981H-2207.

(3) You may review copies of the service

information im:urpornted by referE3nceat the

FAA,Tramport Airplane Directorate, 1601

Lind :\venue, $W.. !{I)nton,Washington; or at

the N~lional AI'l.:hi"f:!s~LllrlRecords

ArJministralioli (NAKAI.For ioformalion on

lIlt)aVHihlbilityuf this Illaleriiuat NARA,rull

20Z-741-[)(J30. or golO: http://

www.(Jn·h.v[ls.gov!ft!dr.roIJegis/er !

codeJ'fJedeml J~&uJ(J/jons!

ibrjucal iuns .h/m/.

issued iu Renton. Washington, all April 29.

2008.

Ali Bahrami,

Manager. Trollsport Airplane Direclamte,

.~;rr;mf/ Certification Service.

1Ft{Doc. E8-9922 Filed 5-7-oB; 6:45 amI

BILUJIlG CODE 491D-l3-P

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2006-26710; Directorate

Identifier 2006-NM-147-ADj Amendmenl

39-15517; AD2006-1D-11]

RIN 2t20-AA64

Airworthiness Directives; Boeing

Model 757 Airplanes

AGENCY;Federal Aviation

Administr<ltion (f AA), Department of

Transportation (DOT).

ACTION:Final rule.

SUMMARY; Tile FAA is adopling a new

airworthiness directivp. (AD) fOl'all

Boeing Model 757 airplanes. This AD

rcquirp.s re\'isillg the Airworthiness

Limitations fA\'IlLs) section of the

Instructions for Continued

Airworthiness by incorporating new

limitations fur fUl:l!tank systems to

satisfy Special Federal Aviation

Regulation No. 88 requirements. This

AD also requires the initial inspection of

certain repetitive AWL inspections to

phase-in those inspections. and repair if

necessary. This AD results from a design

review of the fuel tank systems. We are

issuing Lhis AD to prevent the potential

for ignition sources inside fuel tanks

caused bv latent failures. alterations,

repairs, O"rmaintenance actions, which,

ill comhinaliull with flammable fuel

vapors, could l'as\l1t in a fuel tallk

explosion and conseqlleot loss of the

llirplane.

DATES:This AD becomes effective June

12.2008.

The Director of the Federal Register

approved the incorporation by reference

of a certain publication listed in the AD

as offune 12, 2008.

ADDRESSES:For service information

identified ill this AD, contact Boeing

Commercial Airplanes, P.O. !:lox 3707,

Seattle, Washington 98124-2207.

Examining the AD Docket

You may examine the AD docket on

Ilw Internet at http://

wlVlV.l'egulorions.gov; or in person at the

Docket Management facility between 9

a.m. and 5 p.m., Monday through

Friday, except Federal holidays. The AD

docket contains this AD, the regulatory

evaluation, any comments received. and

other information. The address for the

Docket Office (telephone 800-647-5527)

is the Document Management Facility,

U.S. Department of Transportation.

Docket Operations. M-30, West

Building Ground Floor, Room W12-140.

1200 New Jersey Avenue, SE.,

Washington, DC 20590.

FORFURTHERINFORMATIONCONTACT;Judy

Coyle, Aerospace Engineer, Propulsion

Branch, ANM-140S, rAA, Seattle

Aircraft Certification Office. 1601 Lind

Avenue, SW" Renton, Washington

98057-3356: telephone (425)917-5497:

fax (425) 917-6590.

SUPPLEMENTARYINFORMATION:

Discussion

The FAA issued a supplemental

notice of proposed rulemakillg (NPRM)

to amend 14 CFR part 39 to include an

AD that would apply to all Roeing

Model 757 airplanes. That supplemental

NPR.i\llwas published in the Federal

Register on August 1, 2007 [72 FR

41963). That supplemental NPRM

proposed to requirl:J['evising the

Airworthiness Limitations (AWL~)

section of the Instructions for Continued

Airworthiness (lCA) by incorporating

new limitations for fuel tank systems to

satisfy Special Federal Aviation

Regulation No. 88 requirements. That

supplemental NPRM also proposHd to

require the initial inspection of certain

repetitive inspections specified in the

AWLs to phase-in those inspections.

and repair if necessary. That

supplemental NPRM also proposed 10

revise the original NPRf'..'1by aligning the

compliance time for revising the AWLs

section with the complian(;e date of the

special maintenance program

requirements, updating the Iisling of

applicable <lirptanc maintenance

manuals in Appendix 1. (lud clurifying

certuin ar.;tiOllS

Actions SinCll Supplemental NPRM

Was Issued

Since we issued the supplemental

NPRM, Boeing has issued Temporary

Revision (TR) 09--008, dated M(lrch

2008. Bo{:illgTR 09-008 is published as

Section 9 of the Boeing 757

Maintenance Planning Document (MPD)

Document. D622NOOl-9, Revision

March 2008 (hereafter referred 10 as

"Revision March 2008 of the MPO·'J.

The supplemental NPRM referred 10

Revision Mill'ch 2006 of the MPD us the

appropriale source of service

informatioll for accomplishing tlw

proposed "cliom. l\evision M:lI'I.:h200S

ofthe MPD. among other a(;tions,

includes the following changes:

• Removes t.he repelitive task inlerval

of 36,000 night cycles from AWLs No.

28-AWL--01, No. 28-AWL--03, and No.

28-A1NL-14.

• Revises the task description for

l\WL No. 28-AWL--01 to harmonize it

with AWL No. 28-AWL--02 by removing

references to certain station numbers.

• Revises AWL No. 28-AWL-03 to

reflect the new maximum loop

resistance values associated with the

lightning proLection of the

unpresslll'i:wd fuel quantity indicating

system (FQIS) wire bundle installations.

Accordingly, we have revised

paragraphs (fl, {gl, and (hl of this AD to

refer \0 Revision March 2008 of the

t\1PD. We also have added a new

paragraph (j) to this AD specifying that

actinns done before the llffective date of

this AD in accordance with Revisions

March 2006 through November 2007 of

the MPD are acceptable for compliance

with the corresponding requirements of

paragraphs (gl <lnd (11)of this AD.

!;Vealso have removed refernn(;t! to

36.000 Lotal flight cycles from Table 1 of

this AD and revised the initial threshold

for acr:omplisl1ing AWLs No. 28·-I\WL01, No. 28-AWL-D3, and No. 28··I\WL14 to wilhin120 month~ since the d,lle

of issuance of the original stlllldllrd

airworthiness certificate or lhe datu of

issuance of the original export

certificate of airworthiness.