Docket No: FAA-2015-7095 DirectorateID: 2015-SW-085-AD Originating Office Tracking No.: Disposition Comments



### Next Step: OFRAN c;(sNPRM 

### 0 These comments are in response to an SNPRM



### D No Comments/Only Supportive Comments Received- 

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### Yes/No Has the referenced service information been revised since the 

### NPRM was issued? Ifyes, list latest revision and attach a copy. Note that changes beyondthe scope of the previouslypublishedNPRMwill require a newnotice. Contact the Directorate focalpoint forguidance. Although no new service information has been releasedyet, a new Trev will be issued

## if the life must be reducedbefore thisADgoes to FinalRule. Instructions: Summarize all comments by issue (not by commenter) and provide yourrecommended resolution of each issue. All comments relatingto the same issue should be discussed together. Do not list all ofthe issues from one commentertogether. Ifchanges tothe AD are required based on the comments received, explain why and describe in detail what change(s) you recommend. Reference FAA-IR-M-8040.1C Chapter 9. ISSUE 1: Select one of the following: delay issuance of AD 

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other, explain: Commenter(s): Sikorsky Aircraft Corporation Whatchange to the AD action is requested?
. Sikorsky respectfully requests that FAA extend the NPRM comment period until after December 15, 2016 Why is the change requested or how is itjustified? Sikorsky Aircraft is currently re-evaluating the structural substantiation ofthe part number 92358-06107-043 S-92A tail gearbox centerhousing which resulted in the 12,200 hour Airworthiness Limitations Chapter4 replacement time. The re-evaluation was initiated due to the discovery ofan error in the measured flight test loads that were used in the structural fatigue substantiation. A preliminary re-calculation ofthe 92358-06107M043 housing replacementtime with corrected flight loads resulted in a 11 ,300 hour replacement time. This preliminary calculation will undergo more refinements but the final calculated value may remain below 12,200 hours. Do we agree? Yes IfYES, we agree because Sikorsky has discovered an error in their life calculation. The Final Rule should be issued oncetheerror is corrected. Make the following changes to the AD: Extend the NPRM comment period untill2/151l6. lfPARTIALLY AGREE, we agree with Insert text because Insertjustilication We disagree with Insert text because Insertjustificlllion Make the following changes to the AD: f.ist any 

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### i\D IfNO, we don'tagree because Insert our mtinnale



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### ISSUE 2: Select one of the following: 

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other, explain: 

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### to enter tc:-.:1. Commenter(s): 

### Click here to cmcr text. What change to the AD action is requested? 

### Click here to t:ntcr text. Why is the change requested orhow is itjustified? 

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### Lc;.a. Do we agree? 

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### YES, we agree because Insert iusti!ication Make the following changes to the AD: 

### I.i.st any changcs W 

### the AD IfPARTIALLYAGREE, we agree with Insert text because Insertjustification We disagree with Insert text because Insertjusti!ication Make the following changes to the AD: List an) 

### changes to !he AD IfNO, we don't agree because Insert our 

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### Page2 of3Signature Section Signature indicates concurrence withthis action. Originating Office Tracking 

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