## Version 3 .2 (11/30112) [4910-13-P]===--- oNcuRREN cEs OUTING SYMBO L 

## DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2012-1288; Directorate Identifier 2012-NE-37-AD] RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan 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 General Electric Company (GE) CF34-8C and CF34-8E turbofan engines with certain part numbers (PIN) of operability bleed valves (OBV) installed . This proposed AD was prompted by three failure events of ring lock fuel fittings on the OBV . Two of those NE-110

OUT I NG SYM BOL NE-142 I N IT I ALS/SIG

ATE

ROUT I NG SYMBOL

NE-140 I N ITI ALS/SIG

DATE
OUT I NG SYMBOL NE-7

OUTING SYMBOL 

## events led to an engine fire. This proposed AD would require the affected OBVs be NE-Ill 

## removed from service and replaced with OBVs eligible for installation . We are proposing I N I TIALS/S I G 

## this AD to prevent failure of OBV ring lock fuel fittings , engine fuel leakage, uncontrolled fire, 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 , using the procedures found in 14 CFR 11.43 and 11.45 , by any of the following methods: • Federal eRulemaking Portal: Go to http ://www. regul ation s.gov . Follow the instructions for submitting comments. • Fax: 202-493-2251. • Mail: U. S . Department of Transportation, Docket Operations , M-30, West Building Ground Floor, Room W12-140 , 1200 New Jersey Avenue SE. , Washington , DC 20590. DMihaii/DA ATE 11 / 15 /20 12



## .__ 

# ____

## DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. F

# AA-2012-~X-x;Oirectorate Identifier 2012-NE-37-AD] RIN 2120-AA64

## la~<b Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA) , DOT. ACTION: Notice of proposed rulemaking (NPRM). 

# \'r SUMMARY: We propose to adopt a new airworthiness directive (AD) for all GenerJ Electric Company (GE) CF34-8C and CF34-8E turbofan engines with certain part numbers (PIN) of operability bleed valves (OBV) installed. This proposed AD was prompted by three failure events of ring lock fuel fittings on the OBV. Two ofthose events led to an engine fire. This proposed AD would require the affected OBV s be removed from service and replaced with OBVs eligible for installation . We are proposing I N ITI ALst s tG 

## this AD to prevent failure of OBV ring lock fuel fittings, engine fuel leakage, uncontrolled fire, 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, using the procedures found in 14 CFR 11.43 and 11.45 , by any ofthe following methods: • Federal eRulemaking Portal: Go to http: //www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202-493-2251. • Mail: U.S. Department ofTransportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590 . DMihaii/DA ATE 11 / 15/20 12 OUT I NG SYMBOL EG

OUT I NG SYMBOL NE-110

OUTING SYMBOL NE-100



# '------D rex : Legal concurs . Regards, 

## v Drexel Ace F rom: To : Cc: Date: Subj ect: Hi Vince, 

## Re: ACTION BY 11/23/2012: 12-NE-37-AD, General Electric Company Turbofan Engines, NPRM -- Grid 3.1**~** VincentBennett 1 D lA 11 /30/20121227PM AN E- 00 7. Off i ce of Regi o nal Coun se l .o: rexe ce : Cc John Frost, James E Gray , John Golinski , Paul Donato

Hi Vince. Version 

### 3 . 2 attached for your re v iew/ ... Drexel Ace/ANE / FAA ANE-11 0 , Standards Staff Vincent Bennett/ANE/FAA@FAA, 

### 1 1 /3 0/2012 08:42:28 AM

John Frost!ANE/FAA@FAA, James E Gray/ANE/FAA@FAA , John Golinski/ANE/FAA@FAA , Paul Donato/ANE/FAA@FAA 11/30/2012 08:42AM Re : ACTION BY 11/23/2012 : 12 - NE-37-AD , General Electric Company Turbofan Eng i nes , NPRM -- Grid 3 . 1

Version 

### 3 .2 attached for your review 

### I concurrence . Your changes processed, highlighted in yellow. Thanks. --Drexel
12ne37n.doc Vincent Bennett Minor nits. R , F ro m: To : Vincent Bennett!ANE/FAA ANE-007 , Office of Regional Counsel Drexel Ace/ANE/FAA@FAA, 

### 11/29/2012 04:42:20 PM

Cc: John Frost!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 : 11/29/2012 04:42 PM S u b j ec t: Re : ACTION BY 11/23/2012 : 12 - NE-37-AD, General Electric Company Turbofan Engines, NPRM -- Grid 3.1 Minor nits . 

### R , 

# v

........ .......**~**

.. ..**~··** 12ne37n

### 29~~**v** .doc Drexel Ace Vincent Bennett Drexel Ace Hi Vi nc e , Thanks for your comments . W ith comments . 

### R, V Hi Vince , Vers i on 

### 3 . 0 for your review 

### I concurrence 

### 11/19/201212:48 :04 PM 

### 11/16/2012 02:21:47 PM 

### 11/15/2012 02 : 38:00 PM' I concur. thanks ' Dorina Mihail 

## Re: ACTION BY 11/16/2012: 12-NE-37-AD, General Electric Company Turbofan Engines, NPRM -- Pre-Grid 2 .0**~** Dor i na M ih ai l A NE 1 1 1 R I k. d P 1 . to: Drexel Ace , John Frost 11/15/2012 08:13AM

- , u e ma mg an o 1cy

Federal Aviation Administration Engine & Propeller Directorate Standards Staff ANE-111 12 New England Executive Park Burlington, MA 01803 Phone : (781) 238-7153 Fax : (781) 238 - 7199 E-mail : dorina . mihail@faa
. gov Drexel Ace 

# ···································· ···· H i borina . .. Anntells.. me ..

# ishouid..ti ave . seni..iti is ..to .. :····· ·· · F rom : To: Dat e: Su b j ect: Hi Dorina, Drexel Ace/ANE/FAA ANE-11 0, Standards Staff Dorina Mihaii/ANE/FAA@FAA 11/09/2012 09:17AM ACTION BY 11/16/2012 : 12-NE-37-AD , General Electric Company Turbofan Engines , NPRM -- Pre-Grid 2 . 0

Ann tells me 

### I should have sent this to you. Sorry . I'm still learning the organization charts and responsibilites . --Drexel 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

--- - - Fo rwa rded by Dre xel Ace/A N E/ FAA o n 11 /0 9/2 01 2 09 : 1 3 AM----- From: To: C c : D ate: Su bject: Drexel Ace/ANE/FAA ANE-11 0 , Standards Staff John Frost/ANE/FAA@FAA , Donald Levesque/ANE/FAA@FAA, Ann Mollica/ANE/FAA@FAA, James E Gray/ANE/FAA@FAA , Walter Meibaum/ANE/FAA@FAA 11/09/2012 08 :44 AM ACTION BY 11/16/2012: 12-NE-37-AD , General Electric Company Turbofan Engines , NPRM -- Pre-Grid 2.0

# - Fw: ACTION BY 11/16/2012: 12-NE-37-AD, General Electric Company Turbofan Engines, NPRM -- Pre-Grid 2.0 John Frost


# . c . . . 141 to: Drexel Ace 11/13/2012 03:14PM ANE-141, Eng 1 n e ert 1fl cat 1o n Branch Drexel, thanks great job thus far- I'll try to expedite w/ Dorina tommorrow . . Respectfully, John Frost Aerospace Engineer Federal Aviation Administration ANE-140 12 New England Executive Park Burlington, MA . 01803 781-238-7756

-- -- - F01w a rded by J o hn F ros t /A N E/FAA on 1 1 / 1 3/2012 03: 1 3 P M ----- From : To : Da te: Subj ect : Peter O'Leary/ANE/FAA AEA-BOS-AEG-67, Burlington , MA John Frost/ANE/FAA@FAA, 11/13/2012 03 : 12PM Re : Fw: ACTION BY 11/16/2012 : 12-NE-37-AD, General Electric Company Turbofan Engines, NPRM -- Pre-Grid 2.0 John, reviewed and concur with Version 2 .



## Peter C, 

## O'Leary Aviation Safety Inspector Propulsion Specialist 12 New England Executive Park Burlington, MA 01830 781-238-7890 781-238-7898 fax 781-439-5974 cell " Common sense is genius dressed in working clothes" Ralph Waldo Emerson We value your comments , please fill out the form below: http: //www.faa .gov/about/office_org/headquarters_offices/avs/ stakeholder _feedback/afs/field/sf _ aeg/