### Version 3.0 (1 /30/2013) [4910-13-P] DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2012-1005; Directorate Identifier 2012-NE-27-AD; Amendment 39-:XXXXX; AD 200X-XX-XX] 

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# ILl RIN 2120-AA64 Airworthiness Directives; Pratt & Whitney Canada Corp Turboshaft Engines AGENCY: Federal Aviation Administration (FAA) , DOT. ACTION: Final rule. SUMMARY: We are adopting a new airworthiness directive (AD) for certain Pratt & Whitney Canada Corp. (P&WC) PT6C-67C turboshaft engines. This AD requires initial and repetitive borescope inspections to verify the presence of a retaining ring securing the power turbine (PT) baffle located near the second stage PT disk
. If the engine fails the inspection, this AD also requires removing the engine from service before further flight. This AD was prompted by five reported incidents of second stage PT disk damage. We
are issuing this AD to prevent damage to the PT disk which, if undetected , could cause uncontained PT disk failure and loss of control of the helicopter. DATES: This AD becomes effective [Insert date 35 days after date of publication in the FEDERAL REGISTER]. ADDRESSES: The Docket Operations office is located at Docket Management Facility , U.S. Department of Transportation , 1200 New Jersey Avenue SE ., West Building Ground Floor, Room W12-140 , Washington, DC 20590-0001. OUT ING SYM BOL AEG
IN I

T IALS/ SU RNAME JK eym ont/DA

### Re: ACTION BY 2/6/2013: 12-NE-27-AD, Pratt & 

### Whitney Canada Corp Turboshaft Engines, Final Rule -- GRID 

## 3.0 James Lawren c e 1 D 1A 01/31/2013 0117 PM ANE 142 E . 

## c
.f
. . 1 42 o : rexe ce :

- , ng1n e ert1 1 cat1o n Bra nch Drexel: I concur. Jim Lawrence Tel: 781-238-7176 Fax: 781 - 238-7199 ema i I : ja mes . lawrence@faa
.gov Drexel Ace From: To: Date: H i Jim , Normally , Grid 3.0, with l ega l concurrenc .. . Drexel Ace/ANE/FAA ANE-11 0 , Standards Staff James Lawrence/ANE/FAA @ FAA, 01/31/2013 01 : 14PM 01/31/2013 01:14 : 35 PM

Subject: ACTION BY 2/6/2013 : 12-NE-27-AD , Pratt & Whitney Canada Corp Turboshaft Engines , Final Rule --GRID 3
.0 Hi Jim, Normally, Grid 3
. 0 , with legal concurrence in hand , I would hand the AD and folde r back to the ASE for concurrence. Grid 3
. 0 is attached
. There have been no changes since Version 2.2 that you , AEG , and Tara concurred to. I'm told I can enter your concurrence on the "wet sign" version (as I've done for Vince , for example) , and give it to James
. So , you can either review the attached 3
. 0 , or ask me to note your concurrence just based on your prior review of 2.2 , in which case I will include your 2
.2 concurrence email in the folder for scanning for the docket. Your choice, --Drexel [attachment "12ne31f.doc" deleted by James Lawrence/ANE/FAA] Drexel Ace Technical Writer- Editor Federal Aviation Administration Air Cert ificat i on Service Engine & Propelle r Directorate Standards Staff , ANE-11 0 Burlington , MA Phone : 781-238 - 7197

### Page 1 of 1
Re: ACTION BY 2/6/2013: 12-NE-27-AD , Pratt & 

### Whitney Canada Corp Turboshaft Engines , Final Rule

-- Version 3. 0 Vincent Bennett to: Drexel Ace 01 /30/2013 04:02PM Cc: James E Gray , James Lawrence , John Golinski , Paul Donato Hide Details From: Vincent Bennett /ANE/FAA To: Drexel Ace/ANE/FAA @ FAA , Cc: James E Gray/ANE/FAA @ FAA , James Lawrence/ANE/FAA @ FAA , John Golinski/ANE/FAA @ FAA , Paul Donato/ANE/FAA @ FAA ./ Legal concurs. 

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# v

- ---- D rexel A ce/AN E/ FAA wr o t e : -----

To: Vincent Bennett/ANE/FAA@FAA From: Drexel Ace/AN E/FAA Date: 01/30/2013 03:21PM Cc: John Golinski/ANE/FAA@FAA, Paul Donato/ANE/FAA@FAA, James E Gray/ANE/FAA@FAA, James Lawrence/ANE/FAA@FAA Subject: ACTION BY 2/6/2013: 12-NE-27-AD, Pratt & 

### Whitney Canada Corp Turboshaft Engines, Final Rule -- Version 3.0 Hi Vince, Version 3.0 attached for your review 

## I approval. This is a final rule after notice, based on MCAI. Thanks. --Drexel 

### (See attached file: 12ne27f.doc) Drexel Ace Technical Writer-Editor Federal Aviation Administration Air Certification Service Engine & 

### Propeller Directorate Standards Staff, ANE-110 Burlington, MA Phone: 781-238-7197 [attachment "12ne27f.doc" removed by Vincent Bennett/ANE/FAA]



### file: / /C: \Users\ANE 11 ODA\AppData \Local\Temp\ 1**notes9D4F73 \~** **web5486.htm** 

### 1131/2013

### Re: ACTION BY 1130/2013: 12-NE-27-AD, Pratt & 

### Whitney Canada Corp Turboshaft Engines, Final Rule -- Version 

## 2.2 John Keymont AEA- BOS-AEG-6 7, Burli ngto n, MA to: Drexel Ace Cc. James E Gray, James Lawrence, John Golinski, Paul Donato, Tara Fitzgerald Drexel; BOS AEG concurs with version 2
.2
. 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 01/30/2013 01 :31 PM

We value your comments, please fill out the form below: http ://www.faa.gov/about/office_org/headquarters_offices/avs/stakeholder_feedbacklafs/field/sf_aeg/
Drexel Ace From : To : Cc: Date : S ubj ect: Version 2
. 2, with a coup l e of addit i onal correctio
... Drexel Ace/ANE/FAA ANE-11 0, Standards Staff James Lawrence/ANE/FAA@FAA, Tara Fitzgerald/ANE/FAA@FAA, John Keymont/ AEA/FAA@FAA, 01/29/2013 05:22:40 PM

James E Gray/ANE/FAA@FAA, John Golinski/ANE/FAA@FAA, Paul Donato/ANE/FAA@FAA 01/29/2013 05 :22PM ACTION BY 1/30/2013: 12-NE-27-AD, Pratt & Whitney Canada Corp Turboshaft Engines, Final Rule -- Version 2
.2 Version 2
. 2, with a couple of additional corrections to SB citations noted in turquoise, attached for your review I concurrence. I should have picked up on the cascade of updated citations into Optional Terminating Action and IBR sections. I'm putting a 1-day ACTION date on this to keep it moving
. Thanks
. --Drexel [attachment "12ne27f
. doc" deleted by John Keymont/AEA/FAA]

----- Forwarded by Drexe l Ace/ANE / FAA on 01 /2 9 /2013 04:43PM-- -- -

## ...

Drexel, 

### Re: ACTION BY 1/30/2013: 12-NE-27-AD, Pratt & 

### Whitney Canada Corp Turboshaft Engines, Final Rule -- Version 2.2 

# lidl Tara F itzgerald ANE 11 1 R I k . dP 1 . to: Drexel Ace 01/29/201305:28PM - , u ema mg an o 1 cy Cc: James E Gray, James Lawrence, John Golinski, John Keymont , Paul Donato

I concur with version 2
. 2
. Tara Fitzgerald Federal Aviation Administration Engine 

### & Propeller Directorate Rulemaking and Policy, ANE-111 12 New England Executive Park Burlington, MA 01803 781-238-7130 Drexel Ace From: To : Cc : Date: S u bject: . Version 2.2 , w i th a coup l e of addi t ional correctio
... Drexel Ace/ANE/FM ANE-11 0, Standards Staff James Lawrence/ANE/FM@FM, Tara Fitzgerald/ANE/FM@FM, John KeymonUAEA/FAA@FAA , 01/29/2013 0 5:22:39 PM

James E Gray/ANE/FM@FM, John Golinski/ANE/FM@FM, Paul Donato/ANE/FM@FM 01/29/2013 05 :22PM ACTION BY 1/30/2013 : 12-NE-27-AD , Pratt & Whitney Canada Corp Turboshaft Engines, Final Rule -- Version 2.2 Version 2.2, with a couple of additional corrections to SB citations noted in turquoise, attached for your review I concurrence . I should have picked up on the cascade of updated citations into Optional Terminating Action and IBR sections
. I'm putting a 1-day ACTION date on this to keep it moving. Thanks
. --Drexel [attachment "12ne27f.doc" deleted by Tara Fitzgerald/ANE/FAA]

---- - Forwa rded by Drexe l Ace/A N E/ FAA o n 0 1 /29/20 1 3 04:43 P M --- -- From: To: Cc: Date: Subject: Drexel Ace/ANE/FM ANE-11 0 , Standards Staff James Lawrence/ANE/FM@FM, John KeymonUAEA/FM@FM, Tara Fitzgerald/ANE/FM@FM, James E Gray/ANE/FM@FM , John Golinski/ANE/FM@FM , Paul Donato/ANE/FM@FM 01/24/2013 03 :25PM ACTION BY 1/28/2013: 12-NE-27-AD, Pratt & Whitney Canada Corp Turboshaft Engines, Final Rule-- Version 2.1