### DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 (Docket No. FAA-2012-1327; Directorate Identifier 2012-NE-47-AD] RIN 2120-AA64 Airworthiness Directives; Rolls-Royce plc Turbofan Engines AGENCY: Federal Aviation Administration (FAA) , DOT.

Royce plc (RR) models RB211 Trent 768-60 , 772-60 , and 772B-60 turbofan engines. This proposed AD was prompted by low-pressure (LP) compressor blade partial airfoil release events. This proposed AD would require a one-time ultrasonic C-scan inspection of LP compressor blades that had accumulated more than 2 ,500 flight cycles since ne w . We are proposing this AD to prevent 

## LP compressor blade airfoil separations , engine damage , 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 of the following methods: 

# • Federal eRulemaking Portal: Go to http :/ /www .regulation s.gov and follow the instructions for sending your comments electronically. 

# • Mail: Docket Management Facility , U.S . Department of Transportation , 1200 New Jersey Avenue SE. , West Building Ground Floor, Room W12-140 , Washington , DC 20590
- 0001. • Hand Delivery: Deliver to Mail address above between 9 a.m . and 5 p.m. , Monday through Friday, except Federal holidays.**TIAL ~**  \**Be nn** **~~** DATE 1114/ 13

I N ITI ALS/S I G RL ove/ B DATE 1/3/13 RO U TI

NG SYMBOL NE-110

OUTI NG SYMBO L N E-1oo

# 6or
I NIT I ALS/SIG

### Re: ACTION BY: 1/10/13- 2012-NE-47-AD- Rolls-Royce RB211 Trent 700 Turbofan Engines LP Compressor Blades. NPRM - Ver 2.0 

## [j Tara Fitzgerald . A N E-11 1 , Rul e mak in g an d Pol icy to: Bnan Warner 01/03/2013 01 :07 PM Cc- Alan Rowe, James E Gray, John Golinski , Paul Donato , Robert · Green , Roger H Love Brian , 

### I reviewed version 2 . 0 and concu r. Tara Fitzgerald Federal Aviation Administration Engine 

### & Propeller Directo rate Rulemaking and Policy , ANE - 111 12 New England Executive Park Burlington, MA 01803 781-238-7130 Brian Warner From : Br i an W arner /ANE/FAA ANE - 11 1 , R ul em . . . F rom : Br i an Warne r /ANE/FAA ANE-111 , Rulemaking and Policy 01 /03/2 013 1 1:30:13AM
To: Cc: Roger H Love/ANE /FAA@FAA , Tara Fitzgerald/ANE/FAA @ FAA , Robert Green/ANE/FAA @ FAA , John Golinski/ANE/FAA@FAA , James E Gray/ANE/FAA@FAA , Alan Rowe/ANE/FAA@FAA , Paul Donato/AN E/FAA@F AA Date: S u bject:

All : 01/03/2013 11:30 AM ACTION BY : 1/10/13- 2012-NE-47-AD- Rolls - Royce RB211 Trent 700 Turbofan Engines LP Compressor Blades. NPRM - Ver 2 .0

Please review and provide comment 

### I concurrence . Thanks . .. Bri an Brian M. Warner , Technical Writer/Editor Federal Aviation Administration, Engine 

### & Propeller Directorate , ANE-11 0 Aircraft Certification Service 12 New England Executive Park Burlington , MA 01803 Office : (781) 238-7 1 69 Fax : (781) 238-7199 We value your feedback . The AVS Customer Feedback Form i s at: http ://www .faa . gov/about/office

_org/headquarters_offices/avs/stakeholder

_feedbacklair/field/

### Re: ACTION BY: 1110/13- 2012-NE-47-AD- Rolls-Royce RB211 Trent 700 Turbofan Engines LP Compressor Blades. NPRM - Ver 2.0 

## [J] Roger H Love . AEA -BO S-AEG- 67 , Burlington , MA 

### to: Bnan Warner 01/03/2013 01:18PM Cc Alan Rowe, James E Gray, John Golinski, Paul Donato, Robert · Green , Tara Fitzgerald 

### I concur with version 2.0 . 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/a bout/office_ org/headqua rters_offices/avs/sta keholder _feed back/afs/field/sf_aeg/
Brian Warner All : 01 t o3i20 13 11 :30: 13AM Fro m: Brian Warner/ANE/FAA To : Cc : Roger H Love/ANE/FAA@FAA , Tara Fitzgerald/ANE/FAA@FAA, Robert Green/ANE/FAA@FAA John Golinski/ANE/FAA@FAA , James E Gray/ANE/FAA@FAA, Alan Rowe/ANE/FAA@FAA , Paul Donato/AN E/FAA@F AA Da te: S ubj ect:

All: 01/03/2013 11 :30 AM ACTION BY : 1110/13- 2012-NE-47-AD- Rolls-Royce RB211 Trent 700 Turbofan Engines LP Compressor Blades. NPRM - Ver 2 .0

Please review and provide comment 

### I concurrence. Thanks ... Brian Brian M. Warner , Technical Writer/Editor Federal Aviation Administration, Engine 

### & Propeller Directorate, ANE-11 0 Aircraft Certification Service 12 New England Executive Park Burlington , MA 01803 Office: (781) 238-7169 Fax : (781) 238-7199 We value your feedback . The AVS Customer Feedback Form is at: http ://www .faa . gov/about/office_org/headquarters_offices/avs/stakeholder

_feedbacklair/field/

- - ---Forwar d ed by Brian Warner/ANE/FAA on 0 1/03/2 013 11 : 13AM -----

### Re: ACTION BY: 1/11/13- 2012-NE-47-AD- Rolls-Royce RB211 Trent 700 Turbofan Engines LP Compressor Blades. NPRM - Ver 3.0 

## DJj Vincent Bennett t R b rt G 01/14/2013 02 09 PM ANE-00 7 , Offi ce of Regional Couns e l o: 0 e reen : Cc: Brian Warner History: This message has been forwarded . Concur when Instruction is replaced with information . 

### R, 

# v Robert Green One change (two places) and one cor rection (s . . . From: To : Date: Robert Green/ANE/FAA ANE-142 , Engine Certification Branch 142 Brian Warner/ANE/FAA@FAA, Vincent Bennett/ANE/FAA@FAA, 01/14/2013 01:51 PM 

### 01/14/2013 01 :5 1:42 PM

Subj ect: Re : ACTION BY : 1/11/13- 2012-NE-47-AD- Rolls-Royce RB211 Trent 700 Turbofan Engines LP Compressor Blades . NPRM - Ver 3 . 0 One change (two places) and one correction (see attached) .
12ne47n 14ja (with RG corrections).doc Note , I want to highlight the unsafe condition as a blade airfoil separation as opposed to a blade release, which is a far more significant event (to keep things in the proper perspective) Brian Warner Vincent Bennett Brian Warner B ob , I agree wit h all of Vince's change s . Please . . . M inor nits. R , V Vi nce , 

### . 01/14/2 01 312 :44 :4 6 PM

.. 0 1/1412013 12 :00 : 07P M

01/04/2013 08:15 : 2 1 A M

## Page 1 of6 From: Robert GreeniANEIFAA 

### To: Brian WarneriANEIFAA@FAA 

### Date: Wednesday, January 02, 2013 11: lOAM 

### Subject: Re: ACTION BY: 119113 - 2012-NE-47-AD - Rolls-Royce RB211 Trent 700 Turbofan Engines LP Compressor Blades. NPRM - Ver 1.2

I concur. 

## Robert Green Engine Certification Branch, ANE-142 FAA Engine Certification Office Ph: (781) 238-7754 We va lu e**_~:JO r**  

### reedbac k. Th e Ai rc ra Ft Certi f- icatio n Serv i ce (AIR) Sta ke ho l de r f eedbac k f orm is ava il ab l e at: 

### http://www.faa.gov/about/office erg/headquarters offices/avs/stakeholder feedback/air/field/

"' Brian Warner---01 10 212013 10:53:43 AM---Bob, Please review and provid e comme nt 

## I concurrence. From: Brian WarneriANEIFAA ANE-110, Standards Staff To: Robert GreeniANEIFAA@FAA, Cc: Alan RoweiANEIFAA Date: 0110212013 10:53 AM Subject: Re: ACTION BY: 119113 - 2012-NE-47-AD - Rolls-Royce RB211 Trent 700 Turbofan Engines LP Compressor Blades. NPRM - Ver 1.2 Bob, Please review and provide comment 

## I concurrence. 

### (See attached file: 12ne47n.doc) Thanks ... Brian 

### Brian M . Warner Federal Aviation Administration Engine and Propeller Directorate Standards Staff, AN E-11 0 

## https ://anemailclsl .faa.gov/mailO/BrianWamer.nsf /(%24Inbox)/031E719665A07ED585257... 113/2013