### Versio n 3 .0 1211 7/ 12 

## [4910-13-P] DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2012-0416; Directorate Identifier 2012-NE-13-AD; Amendment 39 .XXXXX; AD 2012-X-X-XX ] t 7 3 o .?:>**~t.. &8**  

## RIN 2120-AA64 Ainvorthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines 

## AGENCY: Federal Aviation Administration (FAA), DOT. 

## ACTION: Final rule. 

## SUMMARY: We are superseding an existing airworthiness directive (AD) for all Pratt & Whitney Canada Corp. (P&WC) PW118 , PW118A , PW118B, PW119B , PW119C , PW120 , PW120A , PW121 , PW121A , PW123 , PW123B , PW123C , PW123D , PW123E, PW123AF , PW124B, PW125B , PW126A , PW127 , PW127E , PW127F, PW127G, and PW127M turboprop engines. That AD currently requires initial and repetitive inspections of certain serial numbers (SINs) ofpropeller shafts for cracks and removal from service if found cracked. This new AD requires the same actions , but requires removal from service of affected propeller shafts as mandatory terminating action to the repetitive inspections. This AD was prompted by reports of two propeller shafts found cracked at time of inspection during maintenance . We are issuing this AD to detect propeller shaft cracks , which could cause failure ofthe shaft, propeller release , and loss of control ofthe airplane . 

## DATES: This AD is effective [INSERT DATE 35 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER] . 

## ADDRESSES: For service information identified in this AD , contact Pratt & Whitney Canada Corp ., 1000 Marie-Victorin , Longueuil, Quebec , Canada, J4G lAl ; phone: 800-268-8000 ; fax: 450-647-2888 ; Web site : www. pwc. ca . You may view this service PAT E 12117112 OUT I NG SYMBO L NE-Ill

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### Re: ACTION BY: 12/20112- 2012-NE-13-AD- P&WC Truboprop Engines Propeller Shaft Cracks. FRS - Version 2.0 [] Tara Fitzgerald . ANE 111 R I k. d P 1 . to: Bnan Warner 12/14/2012 07 :45AM

- , u ema mg an o 1cy Brian, Cc Alan Rowe, James E Gray, James Lawrence , John Golinski, John · Keymont , Paul Donato



### I reviewed version 2 . 0 and concur. Tara Fitzgerald Federal Aviation Administration Engine & Propeller Directorate Rulemaking and Policy, ANE-111 12 New England Executive Park Burlington , MA 01803 781-238-7130 Brian Warner All : Please re view and provide comme nt I con cu . .. From: To: Brian Warner/ANE/FAA ANE-11 0, Standards Staff James Lawrence/ANE/FAA@FAA, John Keymont/AEAIFAA@FAA, Tara Fitzgerald/ANE/FAA@FAA, 12/14/2012 07:1 5:55 AM

Cc: James E Gray/ANE/FAA@FAA, John Golinski/ANE/FAA, Paul Donato/ANE/FAA@FAA , Alan Rowe/ANE/FAA Date: Subj ect: All : 12/14/2012 07 : 15AM ACTION BY: 12/20/12- 2012-NE-13-AD- P&WC Truboprop Engines Propeller Shaft Cracks . FRS - Version 2.0

Please review and provide comment 

### I concurrence . [attachment "12ne13fs .doc" deleted by Tara Fitzgerald/ANE/FAA]
Thanks ... Brian 

### Brian M. Warner Federal Aviation Administration Engine and Propeller Directorate Standards Staff, ANE-110 Technical Writer I 

### Editor 12 New England Executive Park Burlington , MA 01803 781-238-7169

# 5**~** Re: ACTION BY: 12/20/12- 2012-NE-13-AD- P&WC Truboprop Engines Propeller Shaft Cracks. FRS- Version 2.0 

## [j John Keymont . AEA-BOS-AEG-67 , Burli ng ton , MA to Bnan Warner 12/17/2012 09 :20AM 

### C Alan Rowe , James E Gray , James Lawrence , John Golinski, Paul

.c . Donato, Tara Fitzgerald Hello Brian; BOS-AEG concurs with version 2.0 . Regards ; John John Keymont Aviation Safety Inspector Aircraft Evaluation Group 12 New England Executive Park Burlington, MA 01803 Phone: 781-238-7892 Fax : 781-238-7898 We value your comments , please fill out the form below : http:llwww .faa.govlabouVoffice

_ orglheadquarters_officeslavslstakeholder_feedbacklafslfieldlsf_aegl Brian Warner A ll : Please review and prov i de comment 

### I concu ... From: To: Brian Warner/ANE/FAA ANE-11 0 , Standards Staff James Lawrence/ANE/FAA@FAA, John KeymonUAEA/FAA@FAA , Tara Fitzgerald/AN ElFAA@FAA, 1211412012 07 : 15:58 A M

Cc: James E Gray/ANE/FAA@FAA , John Golinski/ANE/FAA , Paul Donato/ ANE/FAA@FAA, Alan Rowe/ANE/FAA Date: Subject: All: 12/14/2012 07: 15AM ACTION BY : 12/20/12 - 2012-NE-13-AD- P&WC Truboprop Engines Propeller Shaft Cracks . FRSVersion 2 .0

Please review and provide comment 

### I concurrence . [attachment "12ne13fs . doc" deleted by John KeymonVAEA/FAA]
Thanks .. . Brian 

### Brian M . Warner Federal Aviation Administration

### t :....;;'

# ~ Re: ACTION BY: 12/21/12- 2012-NE-13-AD- Pratt & 

### Whitney Canada Turboprop Engines Propeller Shaft Cracks. Final Rule Supersedure - Ver 3.0 

## [J Vincent Bennett . A NE 00 7 Off . f R . 1 

## c 1 to. Bnan Warner 12/17/2012 12:04 PM

- , 1ce o eg1ona ounse Legal concurs . Regards , 

# v Cc: Alan Rowe , James E Gray , James Lawrence , John Golinski, Paul Donato

Brian Warner Vince , Please review and provi d e comme nt 

### I co . . . From: To: Brian Warner/ANE/FAA ANE-11 0 , Standards Staff Vincent Bennett/ANE/FAA@FAA , 1 21 1 712 01 2 10 : 39:58 AM

Cc: Paul Donato/ANE/FAA@FAA , John Golinski/ANE/FAA, Alan Rowe/ANE/FAA , James E Gray/ANE/FAA@FAA, James Lawrence/ANE/FAA@FAA Date: Subject: Vince , 12/ 17/201210:39 AM ACTION BY : 12/21/12- 2012-NE-13-AD- Pratt & Whitney Canada Turboprop Engines Propeller Shaft C racks . Final Rule Supersedure - Ver 3 .0

Please rev i ew and provide comment 

### I concurrence .

12ne13fs.doc Thanks .. . Brian 

### Brian M . Warner Federal Aviation Administration Engine and Propeller Directorate Standards Staff , ANE-110 Technical Writer 

### I Editor 12 New England Executive Park Burlington , MA 01803 781-238-7169 b rian .warner@faa .gov Click here to send us your feedback : http ://www .faa.gov/aboutloffice erg/headquarters offices/avs/stakeholde r feedback/air/field/

### Re: ACTION BY: 12/20/12- 2012-NE-13-AD- P&WC Truboprop Engines Propeller Shaft Cracks. FRS -Version 2.0 

## [J James Lawrence . ANE 142 E . 

## c 1 .f . 1 . B h 142 to Bnan Warner 12/17/2012 08 :30AM

- , ngme e1 11ca 1 0n ran c
Brian : 

### I concur . Jim Lawrence C . Alan Rowe , James E Gray, John Golinski, John Keymont , Paul c. Donato, Tara Fitzgerald

Tel : 781-238-7176 Fax : 781-238-7199 email : james . lawrence@faa .gov Brian Warner All: Please rev i ew and provide comment 

### I concu .. . From: To: Brian Warner/ANE/FAA ANE-11 0, Standards Staff James Lawrence/ANE/FAA@FAA, John KeymonUAEAIFAA@FAA, Tara Fitzgerald/ANE/FAA@FAA, 1 211412012 07:15 : 55 AM

Cc : James E Gray/ANE/FAA@FAA, John Golinski/ANE/FAA, Paul Donato/ANE/FAA@FAA , Alan Rowe/ANE/FAA Date : Subj ect: All: 12/14/2012 07 : 15AM ACTION BY: 12/20/12- 2012-NE-13-AD- P&WC Truboprop Engines Propeller Shaft Cracks. FRSVersion 2 .0

Please review and provide comment 

### I concurrence . [attachment "12ne13fs.doc" deleted by James Lawrence/ANE/FAA]
Thanks . .. Brian 

### Brian M . Warner Federal Aviation Administration Engine and Propeller Directorate Standards Staff , ANE-110 Technical Writer I Editor 12 New England Executive Park Burlington, MA 01803 781-238-7169 brian .warner@faa .gov