Docket No: F AA-20 14-0038 

Directorate ID: 2013-SW-023-AD 

Originating Office Tracking No.: 

Disposition Comments 

. Next Step: 0FRAN 0SNPRM 

0 These comments are in 

response to an SNPRM 

0 No Comments/Only Supportive Comments Received -If this box is checked, no signatures are 

required. 

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

list latest revision and attach a copy. Note that changes beyond the scope of the previously 

published NP RM will require a new notice. Contact the Directorate focal point for guidance. 

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 commenter together. If changes to the 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: allow repetitve inspections 

If other, explain: 

Commenter(s): Two commenters stated that EASA and the manufacturer allow for the M/R 

leading edge strip to fly with cracks so long as the crack is within limits. They state that the 

leading edge strip is sacrificial and non-structural. They claim that the proposed AD, which 

requires that if a crack is found it must be repaired or replaced, would result higher cost and 

greater out of service time for the operator without justifiable or measured increase in safety. 

What change to the AD action is requested? They are requesting to allow the aircraft to fly with a 

crack in the M/R leading edge so long as the crack is within the limites prescribed in the EASB. 

Why is the change requested or how is it justified? They believe it will result in higher cost and 

greater out of service time for the operator without a justifiable or measured increase in safety. 

Do we agree? Yes 

lfYES, we agree because after further consideration and receiving the information that there is 

a maintenance procedure that requires the cracks be seals we agree that a crack can be 

tolerated so long as it is within limits. Make the following changes to the AD: Paragraph 

e.(5) should read as follows: Ifthere is a crack within acceptable limits, within 15 hours 

TIS, seal the crack. If there is a crack beyond the acceptable limits, before further flight 

repair or replace the blade. 

TfPARTIALLY AGREE, we agree with because We disagree with because 

Make the following changes to the AD: 

If NO, we don't agree because 

Page 1 of3 
ISSUE 2: Select one of the following: 

If other, explain: 

Commenter(s): 

What change to the AD action is requested? 

Why is the change requested or how is it justified? 

Do we agree? 

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

IfPARTIALLY AGREE, we agree with because We disagree with because 

Make the following changes to the AD: 

IfNO, we don 't agree because 

For additional issues, double-click here 

Page 2 of3 
Signature Section 

Signature indicates concurrence with this action. 

Date ( I 

J tJcf ;:zc;/ 

Date 

Page 3 of3