### Version 3.2 (2/7/ 13) [4910-13-P] DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2012-1331; Directorate Identifier 2012-NE-44-AD] RIN 2120-AA64 Airworthiness Directives; Rolls-Royce (1971) Limited, Bristol Engine Division Turbojet Engines AGENCY: Federal Aviation Administration (FAA) , DOT. ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: We propose to adopt a new airworthiness directive (AD) for all RollsRoyce (1971) Limited , Bristol Engine Di vision (RR) Viper Mk. 601-22 turbojet engines . This proposed AD was prompted by a review carried out by RR ofthe lives of certain critical parts. This proposed AD would require reducing the life ofthese parts . We are proposing this AD to prevent life-limited part failure, damage to the engine , and damage to the airplane. DATES: We must receive comments on this proposed AD by [Insert date 60 days after date of publication in the FEDERAL REGISTER]. ADDRESSES: You may send comments by any ofthe following methods:
• Federal eRulemaking Portal: Go to http ://www .reg ulati ons.gov and follow the instructions for sending your comments electronically.
• Mail : U. S . Department of Transportation , 1200 New Jersey Avenue SE. , West Building Ground Floor, Room W12-140 , Washington, DC 20590-0001. ONCU RRENC E S ROUT I N G SY M BO L ANE-110

I NI

TIAL S/ SURN AM E VB enn ett/DA D AT E 2/ 11 113 O UT I NG S Y MBO L ANE-lll I N IT I AL S / SU RN AME TFitzge ra 1d/DA ATE 1/ 10/ 13 O UTI NG SYMBO L A EG I N ITI A L S/ SU RNAM E RLove/DA

### Re: ACTION BY 2/12/2013: 12-NE-44-AD, Rolls-Royce (1971) Limited, Bristol Engine Division Turbojet Engines, NPRM -- Version 3.2**~** Vincent Bennett t D I A 02/11/2013 10 37 AM ANE-00 7, Office o f Regional Cou nse l o: rexe ce : Cc: Robert Gre en , John Golinski, Paul Donato, James E Gray Tis a beautiful thing , a simple clear rule. Legal concurs . regards , VB Drexel Ace From: To: . Hi Vince, Version 3 .2 is attached for your review
.. . Drexel Ace/ANE /FAA ANE-110, Standards Staff Vincent Bennett/ANE/FAA@FAA , 02/11/2013 08 :4 8: 30 AM

Cc: Robert Green/ANE/FAA@FAA, John Golinski/ANE/FAA@FAA , Paul Donato/ANE/FAA@FAA , James E Gray/ANE/FAA@FAA Date: 02/1 1/2013 08 :48AM Subj ect: ACTION BY 2/12/2013 : 12-NE-44-AD, Rolls-Royce (1971) Limited , Bristol Engine Division Turbojet Engines , NPRM -- Version 3 .2 Hi Vince , Version 3 . 2 is attached for your review 

### I concurrence . Please see rework (highlighted in yellow) in "Costs of Compliance" and "Actions and Compliance" sections
. Thanks
. --Drexel

12ne44n .doc Drexel Ace Technical Writer-Editor Federal Aviation Admin i stration Air Certification Service Engine 

### & Propeller Directorate Standards Staff, ANE-11 0 Burlington , MA Phone : 781-238-7197 To send us your feedback , click he re! Vincent Bennett D rexel Ace Rqger

_ H Lqve Vincent Bennett Roger H Love Drex : If that's all that chang ed then I'm returning
.. .



### . Hi Vi nce, Version 3 .2 is attached for your**review ~**  ..

Vinc e, A l l we have is the registry to rely on and
... Look s l ike it will probably be an NP , unless they
. . .
. ... .

Bob a nd Drexel, I just read my earlier e-mail (bel.
.. 01/31/2013 03 : 55 :1 0 PM 01/31 /2013 03:05 : 02 PM 01/24/2013 08 :5 9:27 AM 01/24/2013 08 :42 : 30 AM 01/24/2013 08 : 02 : 31 AM

# .. • Re: ACTION BY 1/11/2013: 12-NE-44-AD, Rolls-Royce (1971) Limited, Bristol Engine Division Turbojet Engines, NPRM -- Version 2.1 

## [;;n


# - Roger H Love
. AEA- BOS-AEG-6 7, Burlington, MA to : Jonathan Galvm 01/11/2013 06 : 15AM C, Drexel Ace, James E Gray, John Golinski , Paul Donato, Robert 

### ,c. Green , Tara Fitzgerald 

### I concur with the changes but 

### I noticed the ASB was dated October 31 , 2012 , see last page not November.

Ser vk; e B ull et in 72-A20S
.docx Roger H. Love Propulsion Specialist Boston Aircraft Evaluation Group (AEA-BOS-AEG-67) 781-238-7891, fax 7898 We value your comments, please fill out the form using the following link : http ://www
.faa.gov/about/office

_ org/headquarters

_offices/avs/stakeholder

_feedbacklafs/field/sf_aeg/
Jonathan Galvin Drexel , A few comments and suggested change
. .. . From: To: Jonathan Galvin/ANE/FAA ANE-11 0, Standards Staff Drexel Ace/ANE/FAA@FAA 0 1/10/201 3 01 :4 0:24 PM

Cc : Date: James E Gray/ANE/FAA@FAA , John Golinski/ANE/FAA@FAA, Paul Donato/ANE/FAA@FAA , Robert Green/ANE/FAA@FAA , Roger H Love/ANE/FAA@FAA , Tara Fitzgerald/ANE/FAA@FAA 01/10/2013 01:40PM Su bject: Re : ACTION BY 1/11/2013: 12-NE-44-AD , Rolls-Royce (1971) Limited , Bristol Engine Division Turbojet Engines , NPRM --Version 2 . 1 Drexel, A few comments and suggested changes
. You should rename the file also ("12ne44n"), [attachment "12ne44n
. doc" deleted by Roger H Love/ANE/FAA] Jonathan Galvin Technical Writer-Editor Engine 

### & Propeller Directorate Standards Staff , ANE-11 0 Phone : 781-238-7759 Fax : 781-238-7199 Drexel Ace Hi A ll , Short fuse on this one , which is now unde
... 01/10/2013 12 : 05 :2 3 PM

### Re: ACTION BY 1/11/2013: 12-NE-44-AD, Rolls-Royce (1971) Limited, Bristol Engine Division Turbojet Engines, NPRM --Version 2.1 

# Gil Tara Fitzgera l d ANE 111 R I k . d P 1 . to: Drexel Ace 01/10/2013 02 :32PM

- , u em a mg an o 1 cy
Drexel , C James E Gray , John Golinski, Jonathan Galvin , Paul Donato, Robert c. Green, Roger H Love


### I concur with version 2 . 1 and 

### I agree with Jon Galvin's suggested changes
. 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: Hi All , Short fuse on thi s one , which is now unde
. .. Drexel Ace/ANE/FAA ANE-11 0, Standards Staff 01/10/2013 12:05:23 PM
To : Cc: Robert Green/ANE/FAA@FAA , Roger H Love/ANE/FAA@FAA, Tara Fitzgerald/ANE/FAA@FAA, James E Gray/ANE/FAA@FAA, John Golinski/ANE/FAA@FAA, Paul Donato/ANE/FAA@FAA , Jonathan Galvin/ANE/FAA@FAA Date : S ubject: Hi All, 01/10/2013 12 :05 PM ACTION BY 1/1112013 : 12-NE-44-AD , Rolls-Royce (1971) Limited, Bristol Engine Division Turbojet Engines , NPRM --Version 2 . 1
Short fuse on this one, which is now undergoing another Version 2 review cycle. Because there are possible US operators, this AD is being converted from an NFR to an NPRM. Naturally, it is based on MCAI. Version 2.1 is attached for your review I concurrence . We are currently at 37 days. Thanks. --Drexel [attachment "12ne44f
. doc" deleted by Tara Fitzgerald/ANE/FAA] Drexel Ace Technical Writer-Editor Federal Aviation Administration Air Certification Service Engine & Propeller Directorate Standards Staff, ANE-11 0 Burlington , MA Phone: 781-238-7197