### Vers io n 3.4 ( 11 / 30 / 12) 

### D EPA RTMENT OF TRANSPORTATION Federal Aviation Administration 14 CF R Pa rt 39 [Docket 

### No. FAA-2012-1167; Directorate Identifier 2012-NE-36-AD] RIN 2120-AA64 Ainvorthincss Directives; Roll s- Ro yce D e ut s chland Ltd 

## & Co KG T urbofan E n gines AGENCY: Federal Av iation Administration (FAA) , DOT. ACTION: Notice of proposed rulemakin g (N PRM). SUMMARY: We propose to adop t a new airworthiness di rective (AD) for certain Rolls Ro yce Deu tsc hland Ltd & 

### Co KG (RRD) model s Tay 620- 1 5 

### and Tay 650-15 

### turbofan engi nes. Thi s proposed AD was p rompted by RRD recalculat ing the Declared Safe Cyclic Life ( D SCL) tor certai n low-pre ssure compr esso r (LPC) rotor d isc assembli es operating to t he Plan D F light Mission. This propo s ed AD would require remov in g the INITIAl..vS I G 

# IL \**rFilZ gc** **f~** ATE 10

/3 1 / 1

2 

### aftec t ed LPC rotor disc assemblies at a new lower r ecalc ulated DSCL. We are propos in g**ll NosvM** **lO~** EG 

### thi s AD to prevent failure of the LP C rotor disc assembly , uncontained eng ine failure, and damage to the a irplane. DAT ES : We must receive comments on this proposed AD by [in se rt date 60 

### days after date of pub li cation in the FEDERAL REG ISTER] . ADDRESSES: You may se nd comments , using the procedu res found i n 14 CFR 1 1.43 a nd 1 1.45 , 

### by an y of the following me th ods:

in stru ction s for se nding your comments e lectronically. I N IT I ALSISIG , RLOVI.: ATE 10

/311 1 2

### Re: A C TION BY: 11 n1 1 2- 2 0 12 -NE- 36-AD - R o ll s Royce D e utsc hland ( RRD) Ltd & Co KG T a y 62 0, 65 0-1 5 Turb ofan En gi n es LP C D isc A ssy Life Limi t a t i o n

- Impl e m e ntat i o n. NPRM - V e rsio n 2. 0 

### .j Roger H Love AEA-BOS -A E G - 67. Burlington , MA Frederick Z ink, Tara F itzgera ld I concur with version 2.1. Brian Warner 10 / 31 /2012 02:31 PM

I was also going to mention not needing the previous TC holde rs location (Derby) in the AD. Roger H. Love Propulsion Specia l ist Boston Aircraft Evaluation Group (AEA- B OS-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

_feedbacklafslfield/sf_aeg/
Brian Warner Roger / Fred , Please take a look at the newl y revi. . . From: To Cc: Brian Warner /ANE / FAA ANE-11 0, Standards Staff Roger H Love/ANE/ FAA@FAA, Frederick Zink/ANE/ FAA @ FAA Tara Fitzgerald / ANEIFAA@FAA 10

/ 3112012 02:21 PM 10 / 31 / 2012 02 : 21 :48 PM

Date Subject Re: ACTIO N BY: 1 1 /7/1 2- 2012-NE-36-AD- Rolls Royce Deu tschland (RRD) Ltd & Co KG Ta y 620, 650-15 Turbofan Engines LPC Disc Assy Life Limita t ion - Implementation. NPRM -Vers ion 2.0 Roger/Fred , Please take a loo k at the new l y revised 12ne36. I have Version 2 concurrence from Tara with caveat that SB number is correct. I know I have you r conc urrence a l so Fred , but this way you can see the l atest change. T here are two changes h i ghlighted in yellow . Please rev i ew and provide comments/concurrence. (atta c hm e nt "12ne36n.doc" deleted by Roger H Love/A NE/FAA]
T h anks .. . Bria n 

### Br i an M . Warner Federal Aviation Admin i stration Engine and Propeller Directorate Standards Staff , ANE-11 0 Technical Writer 

### I Editor 12 

### New England Executive Park Bur l ington , MA 01803

# • . Re : ACTION BY: 11n112- 2012-NE-36-AD- Rolls Royce Deutschland (RRD) Ltd 

### & Co KG Tay 620, 650-15 Turbofan Engines LPC Disc Assy Life Limitation

- Implementation . NPRM - Version 2.0 

### [3 Tara Fitzgerald A NE -111. Ru l e m ak m g a n d P olicy Brian Warner Alan Rowe, Frederick Zink, James E Gray, John Golinski, Paul Donato, Roger H Love Brian , 

### I reviewed version 2.0 and concur ( date of SB being the right one per R L 's email) . Ta ra F i tzgera ld Federal Aviation Admin istrat ion Engine 

### & Propeller Directorate Rulemaking and Policy , ANE-111 12 New England Executive Park Burlington , MA 01803 781-238-7130 Brian Warner Please review and provide comments/concur ren ... F10m: Brian Warner/ANE/FAA ANE-110, Standards Staff 10 /31 /2012 01:38PM

10

/ 31/20 12 10 : 41:01 AM
To: Cc: Roger H Love/A NE/ FAA@FAA , Tara Fitzgerald/ ANEIFAA@FAA , Frederick Zink/ANE/FAA@FAA John Golinski / ANE / FAA, James E Gray / ANE / FAA@FAA, Paul Donato/ ANE / FAA@FAA , Alan Rowe/ANE / FAA Date· SubJect: 10/31 /2012 10 : 41 AM ACTION BY : 1117/12- 2012-NE-36-AD- Ro lls Royce Deutschland (RRD) Ltd & Co KG Tay 620, 650-15 Turbofan Engines LPC Disc Assy Life Limitation - Imp l emen tation. N PR M - Version 2.0 Please review and provide comments/concurrence . [attachment " 12ne36n.doc" deleted by Tara Fitzgerald/ANE/FAA] Thanks ...
Brian 

### B ri an M . Warner Federa l Avia t ion Administration Engine and Propeller Di rectorate Standards Staff , A NE -110 Technical Writer I 

### Editor 12 N ew England Exe cutive Park Burlington , MA 01803 781-238-7169 brian .warner@faa
. gov Click here to send us you r feedback: http://www . faa . gov/about/office erg/headquarters offices/avs/stakeholder feedback/air /field /

### Re : ACTION BY: 12/611 2- 2012-NE-36 -AD- Rolls Royce Deutschland (RRD) Ltd & 

### Co KG Tay 620 , 650-15 Turbofan Engines LPC Di s c Assy Life Limitation

- Implementation . NPRM - Version 3.3 

# 0

Brian: Concur. Regards, 

# v Vincent Ben n ett 1 B . W



### . . o na n arner ANE-00 7 . Off1ce o f Reg1onal Counsel**~** John Golinski, Pau l Donato , Alan Rowe, James E Gray , Frederick**~<** Zink

Bria n Warne r Vin ce, Here is the subject AD with your commen .. . From: Br ian Warn er/ ANE/FAA ANE-110 , Standards Staff Vincent Ben netVA NEIFAA @ FAA , 11/30/2012 10 :27 AM



### 11/30/2012 10:24 :43 AM
T o· Cc: John Golinski / ANEIFAA, Pau l Donato/ ANEIFAA@FAA, Alan Rowe / ANEIFAA, James E Gray / ANE /FAA@FAA , Frederick Zink/ANE/ FAA@FAA Date: 11/30/2012 10:24 AM Subject: Re : ACTION BY : 12 /6/ 12 - 2012-NE-36-AD- Rolls Royce Deutschland (RR D) ltd & Co KG Tay 620, 650 -15 Turbofan Engines LPC Disc Assy Life Limita t ion - Imp l ementation. NPRM - Vers ion 3.3 V i nce , Here is t h e subjec t AD with you r comments entered . New changes are highlighted in yellow. Please review provide comment I concu r rence .

# ~ 12ne36n . doc T h a n ks ... Brian 

### Brian M . Warner Federa l Avi ation Administration Eng i ne a n d P ropeller D i rectorate Sta n dard s Staff, A NE - 1 1 0 T ec hnical Writ e r 

### I E di t o r 1 2 N e w Englan d E xec u tive Par k Burlin gt o n , MA 01803 781-238-7 1 69 brian . warner@faa
. go v Click here to send us you r feedback: http://www.f aa . gov /about/office erg /h eadquarte rs offices/avs/stakehold er feedback/air/field/ V i nce nt Be n nett This mus t be the one ... W ith co mments . 

### 11 /29/2012 10 : 35:11 A M