### 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 ischecked, 110signatures are required. 

### No Has the referenced service infonnation been revised since the NPRM was issued? Ifyes, list latest revision and attach a copy. Note rhatchanges beyond the scope a/the previous(v published NPRM will require anew 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 ofthe issues from one commcnter together. Ifchanges 10the AD are required based on the comments received, explain why and describe indetail what change(s) you recommend. Reference FAA-IR-M-8040.IC Chapter 9. ISSUE 1: Select one ofthefollowing: other

Ifother, explain: Statement clarification Commentcr(s): Boeing What change to the AD action isrcquested? 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 isthe change requested or how isitjustified? 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: I

## rI'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 inBoeing S8 727-29-0057 to prevent cracking, ONLY as an optiof1,o Make the following ch'anges to the AD: (e) This AD results from re?orts ofcracks inthe 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 ofthe airplane, resulting indil'ficulty maintaining cabin pressurization or rapid decompression ofthe airplane. IfNO, we don't agree because
ISSUE 2: Select one ofthefollowing.- other

Ifother, 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 isthe 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 IfYES, 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 inTables 1 and 2 ofparagraph 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) ofthis AD: Perform adetailed inspection for cracking on the aft side ofrhe aftpressure bulkhead web between water line (WL) 217 to WL 230, and buttock line (BL) 48 left to BL 66 left. Dothe inspection inaccordance with the Accomplishment Instructions ofthe service bulletin. IfPARTIALLY AGREE, we agree with because

Make the following changes to the AD: IfNO, we don't agree because

ISSUE 3: Selecl one ofthefollowing: Other Ifother. explain: Statement clarification Commcnter(s): Boeing We disagree with because

Whal changc to the AD action isrequested? Modify paragraph (g)(2) inreference to tables to statc:"
... interval specified inTable 2 ofParagraph I.E.... " Why isthe change requested or how is itjustified? The original paragraph states: "
... interval specified in Table I and 2 of Paragraph I.E.... " The subject ofparagraph (g)(2) is Group 1,Configuration 2 airplanes, which is addressed in Boeing S8 727-53-0232 only inTable 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 ofairplanes are addressed only inTable 2 Make the following changes to the AD: [For pargargh (g)]: (2) For Group I, Configuration 2 airplanes, as identified inthe service bulletin: 1fno cracking is found during the inspection required by paragraph (g) ofthis AD, repeat the detailed inspection atthe applicable interval specified inTables ~2 ofparagraph I.E., "Compliance," ofthe service bulletin. 

# .1/.C
. IfPARTiALLY AGREE, we agree with Make the following changes to the AD: IfNO, we don't agree because
For additional issues, double-click here because



### Page 2 of;J We disagree with because

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BranrhManage;:~ Signature Section Signature indicates concurrence with this action. Originating Office Tracking No .

### 08-AD-2d' 

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