Version 3.2 (11/30112) [4910-13-P]===--- oNcuRRENcEs 

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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 

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NE-142 

INITIALS/SIG 

ATE 

ROUTING SYMBOL 

NE-140 

INITIALS/SIG 

DATE 

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NE-7 

events led to an engine fire. This proposed AD would require the affected OBVs be OUTING SYMBOL 

NE-Ill 

removed from service and replaced with OBVs eligible for installation. We are proposing INITIALS/SIG 

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 ations.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 INITIALststG 

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 

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EG 

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'------
Drex: 

Legal concurs. 

Regards, 

v 

Drexel Ace 

From: 

To: 

Cc: 

Date: 

Subject: 

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-007. Office of Regional Counsel .o: rexe ce : 

Cc John Frost, James E Gray, John Golinski, Paul Donato 

Hi Vince. Version 3.2 attached for your review/ ... 

Drexel Ace/ANE/FAA 

ANE-11 0, Standards Staff 

Vincent Bennett/ANE/FAA@FAA, 

11/30/2012 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 Engines, 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, 

From: 

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 

Subject: 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 Vince, Thanks for your comments. 

With comments . R, V 

Hi Vince, Version 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 ~ 

Dorina Mihai l 

ANE 111 R I k

. d P 1. to: Drexel Ace, John Frost 11/15/2012 08:13AM - , u ema 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 ········································Hi borina ... Anntells .. me .. ishouid .. tiave.seni .. itiis .. to .. :····· ·· · 

From: 

To: 

Date: 

Subject: 

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 

----- Forwarded by Drexel Ace/ANE/FAA on 11 /09/201 2 09:13 AM-----

From: 

To: 

Cc: 

Date: 

Subject: 

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, Eng1ne ert1flcat1on 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 

----- F01warded by John Frost/ANE/FAA on 11/13/2012 03: 13 PM -----

From : 

To: 

Date: 

Subject: 

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/