Dock., No' rAA-20 I0-0646

Directorate ID: 2009-NM-223~AD

Originating Office Tracking No.: 08-AD-2

o NO COMMENTS RECEIVED - fj/his box is checked, 110 signatures are required.

No Has the referenced service infonnation been revised since the NPRM was issued? If yes,

list latest revision and attach a copy. Note rhat changes beyond the scope a/the previous(v

published NPRM will require a new nOliee_ Contact the DireClOrale focal poinlfor guidance.

N/A

Instructions: Summarize all comments by issue (not by commenter) and provide your recommended resolution of

each issue. All comments relating to the same issue should be discussed together. Do not list all of the issues

from one commcnter together. Ifchanges 10the AD are required based on the comments received, explain why and

describe in detail what change(s) you recommend. Reference FAA-IR-M-8040.IC Chapter 9.

ISSUE 1: Select one of the following: other

If other, explain: Statement clarification

Commentcr(s): Boeing

What change to the AD action is rcquested? Modify paragraph (c) 2nd sentence to state:" .. .is

issuing this AD to detect and repair cracking or to modify structure to prevent cracking, in the aft

pressure bulkhead web, which ... "

Why is the change requested or how is itjustified? The original paragraph states: " ... the AD is being

issued to prevent cracking ... " whereas the AD provides both modification instructions to prevent

cracking, as well as, instructions to repair cracking.

Do we agree?

IrYES, we agree because Make the following changes to the AD:

IrI' ARTIALLY AGREE, we agree with FAA "is issuing this AD 10detect and repair cracking"

because The AD provides instructions to detect and repair cracking, as necessary, Wc disagree

with The FAA "is issuing to modify structure to prevent cracking" because AD does not mandate

any modification. The modification instructions is available in Boeing S8 727-29-0057 to prevent

cracking, ONLY as an optiof1,oMake the following ch'anges to the AD: (e) This AD results from

re?orts of cracks in the af~pressure but~Rad !e?.:;.Jh~l~c~al Avi~tion Administrati~n is issuing

thIs AD to ~etect Gf'nel~lftg.,nswd\ a!lf"mmue~~arr cracklng,-W' l)(j~ IIIthe an

pressure bulkhead web, which could adversely affect the structural integrity of the airplane,

resulting in dil'ficulty maintaining cabin pressurization or rapid decompression of the airplane.

IfNO, we don't agree because

ISSUE 2: Select one ofthefollowing.- other

If other, explain: StQtemenl clarificatioll

Commcntcr(s): Boeing

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What change to the AD action is requested? Modify paragraph (g) to state; " ... Perform a detailed

inspection for cracking on the aft side of the aft pressure bulkhead web between ... "

Why is the change requested or how is itjustified? The original paragraph states: "Perform a

detailed inspection for cracking on the area around the hydraulic lines support bracket on the aft

side of the aft pressure bulkhead web between ... " The Group I, Configuration 2 airplanes do not

have a hydraulic bracket installed to be inspected "Around the bracket", but there is an

inspection in that bay of the web. Boeing recommends revision accordingly to clarify maners.

Do we agree? Yes

If YES, we agrce because there are some airplanes that do not have the subject hydraulic bracket

installed on them Make the following changes to the AD: At the applicable initial compliance

time specified in Tables 1 and 2 of paragraph J.E., "Compliance," of Boeing Special

Attention Service Bulletin 727-53-0232, dated September 23, 2009

C 'the service bulletin"); except as provided by paragraph (j) of this AD: Perform a detailed

inspection for cracking on the aft side ofrhe aft pressure bulkhead web between water line (WL)

217 to WL 230, and buttock line (BL) 48 left to BL 66 left. Do the inspection in accordance with

the Accomplishment Instructions of the service bulletin.

If PARTIALLY AGREE, we agree with because

Make the following changes to the AD:

If NO, we don't agree because

ISSUE 3: Selecl one of the following: Other

If other. explain: Statement clarification

Commcnter(s): Boeing

We disagree with because

Whal changc to the AD action is requested? Modify paragraph (g)(2) in reference to tables to

statc:" ... interval specified in Table 2 of Paragraph I.E .... "

Why is the change requested or how is itjustified? The original paragraph states: " ... interval specified in

Table I and 2 of Paragraph I.E .... " The subject of paragraph (g)(2) is Group 1, Configuration 2 airplanes,

which is addressed in Boeing S8 727-53-0232 only in Table 2 ofparagl'apb I.E. "Compliance". Table I

of paragraph J .E. addresses only the Group I, Corrfiguratiol1l1 and Group 2 airplanes

Do we agree? Yes

!fYES, we agree because The correct set of airplanes are addressed only in Table 2 Make the following

changes to the AD: [For pargargh (g)]:

(2) For Group I, Configuration 2 airplanes, as identified in the service bulletin: 1fno cracking is found

during the inspection required by paragraph (g) of this AD, repeat the detailed inspection at the applicable

interval specified in Tables ~2 of paragraph I.E., "Compliance," of the service bulletin. .1/.C .

If PARTiALLY AGREE, we agree with

Make the following changes to the AD:

If NO, we don't agree because

For additional issues, double-click here

because

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We disagree with because
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Manage;:~

Signature Section

Signature indicates concurrence with this action.

Originating Office Tracking No . 08-AD-2d' l ~ 1'1, 1 I~