14312 Federal Register / Vol. 77, No. 47 / Friday, March 9, 2012 / Proposed Rules 

AD. Send your proposal to: Matt Wilbanks, 

Aerospace Engineer, FAA, Rotorcraft 

Directorate, Regulations and Policy Group, 

2601 Meacham Boulevard, Fort Worth, Texas 

76137, telephone (817) 222–5051, email 

matt.wilbanks@faa.gov. 

(2) For operations conducted under a Part 

119 operating certificate or under Part 91, 

Subpart K, we suggest that you notify your 

principal inspector, or lacking a principal 

inspector, the manager of the local flight 

standards district office or certificate holding 

district office before operating any aircraft 

complying with this AD through an AMOC. 

(f) Additional Information 

The subject of this AD is addressed in 

European Aviation Safety Agency AD No. 

2011–0033, dated March 15, 2011. 

(g) Subject 

Joint Aircraft Service Component (JASC) 

Code: 2900: Hydraulic Power System. 

Issued in Fort Worth, Texas, on February 

24, 2012. 

Lance T. Gant, 

Acting Manager, Rotorcraft Directorate, 

Aircraft Certification Service. 

[FR Doc. 2012–5620 Filed 3–8–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2012–0195; Directorate 

Identifier 2012–NE–08–AD] 

RIN 2120–AA64 

Airworthiness Directives; Honeywell 

International, Inc. 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 

Honeywell International, Inc. ALF502L– 

2C; ALF502R–3; ALF502R–3A; 

ALF502R–5; LF507–1F; and LF507–1H 

turbofan engines. This proposed AD was 

prompted by two reports of engines 

experiencing uncontained release of 

low-pressure (LP) turbine blades. This 

proposed AD would require operational 

checks of the engine overspeed trip 

system. We are proposing this AD to 

prevent LP turbine overspeed leading to 

uncontained release of the LP turbine 

blades and damage to the airplane. 

DATES: We must receive comments on 

this proposed AD by May 8, 2012. 

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.regulations.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. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 

5 p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this proposed AD, contact Honeywell 

International, Inc., P.O. Box 52181, 

Phoenix, AZ 85072–2181, phone: 800– 

601–3099; Web site: http:// 

portal.honeywell.com/wps/portal/aero. 

You may review copies of the 

referenced service information at the 

FAA, Engine & Propeller Directorate, 

12 New England Executive Park, 

Burlington, MA. For information on the 

availability of this material at the FAA, 

call 781–238–7125. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Management Facility between 

9 a.m. and 5 p.m., Monday through 

Friday, except Federal holidays. The AD 

docket contains this proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Office 

(phone: 800–647–5527) is in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

FOR FURTHER INFORMATION CONTACT: 

Robert Baitoo, Aerospace Engineer, Los 

Angeles Aircraft Certification Office, 

FAA, 3960 Paramount Blvd., Lakewood, 

CA 90712; phone: 562–627–5245; fax: 

562–627–5210; email: 

robert.baitoo@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposal. Send your comments to 

an address listed under the ADDRESSES

section. Include ‘‘Docket No. FAA– 

2012–0195; Directorate Identifier 2012– 

NE–08–AD’’ at the beginning of your 

comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this proposed AD. We will 

consider all comments received by the 

closing date and may amend this 

proposed AD because of those 

comments. 

We will post all comments we 

receive, without change, to http:// 

www.regulations.gov, including any 

personal information you provide. We 

will also post a report summarizing each 

substantive verbal contact we receive 

about this proposed AD. 

Discussion 

We received two reports of engines 

experiencing uncontained release of LP 

turbine blades. Investigation revealed 

that the overspeed trip system on both 

of these engines had a preexisting 

(latent) failure when the fan decoupled 

from the LP turbine, due to a certain 

part failing in the reduction gearbox. 

This condition, if not corrected, could 

result in LP turbine overspeed leading 

to uncontained release of the LP turbine 

blades and damage to the airplane. 

Relevant Service Information 

We reviewed Honeywell 

International, Inc. ALF502L Engine 

Maintenance Manual Section 72–00–00, 

Inspection/Check-10, dated October 31, 

2000; ALF502R Engine Manual Section 

72–00–00, Inspection/Check-09, dated 

July 31, 2000; LF507–1F Engine Manual 

Section 72–00–00, Inspection/Check-08, 

Temporary Revision 72–146, dated 

November 3, 2006; and LF507–1H 

Engine Manual Section 72–00–00, 

Inspection/Check-08, dated September 

30, 1999. The service information 

describes procedures for operational 

checks of the overspeed trip system. 

FAA’s Determination 

We are proposing this AD because we 

evaluated all the relevant information 

and determined the unsafe condition 

described previously is likely to exist or 

develop in other products of the same 

type design. 

Proposed AD Requirements 

This proposed AD would require 

initial and repetitive operational checks 

of the overspeed trip system. 

Costs of Compliance 

We estimate that this proposed AD 

would affect 188 Honeywell 

International, Inc. ALF502L–2C; 

ALF502R–3; ALF502R–3A; ALF502R–5; 

LF507–1F; and LF507–1H turbofan 

engines, installed on airplanes of U.S. 

registry. We also estimate that it would 

take about one work-hour to perform an 

operational check of the overspeed trip 

system on each engine. The average 

labor rate is $85 per work-hour. Based 

on these figures, we estimate the total 

cost of this proposed AD for one 

operational check of the overspeed trip 

system to U.S. operators, to be $15,980. 


sroberts on DSK5SPTVN1PROD with PROPOSALS
Federal Register / Vol. 77, No. 47 / Friday, March 9, 2012 / Proposed Rules 14313 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. Subtitle VII: 

Aviation Programs, describes in more 

detail the scope of the Agency’s 

authority. 

We are issuing this rulemaking under 

the authority described in Subtitle VII, 

Part A, Subpart III, Section 44701: 

‘‘General requirements.’’ Under that 

section, Congress charges the FAA with 

promoting safe flight of civil aircraft in 

air commerce by prescribing regulations 

for practices, methods, and procedures 

the Administrator finds necessary for 

safety in air commerce. This regulation 

is within the scope of that authority 

because it addresses an unsafe condition 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

We determined that this proposed AD 

would not have federalism implications 

under Executive Order 13132. This 

proposed AD would not have a 

substantial direct effect on the States, on 

the relationship between the national 

Government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify this proposed regulation: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Is not a ‘‘significant rule’’ under 

the DOT Regulatory Policies and 

Procedures (44 FR 11034, February 26, 

1979), 

(3) Will not affect intrastate aviation 

in Alaska, and 

(4) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 14 CFR part 

39 as follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

2. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive (AD): 

Honeywell International, Inc.: Docket No. 

FAA–2012–0195; Directorate Identifier 

2012–NE–08–AD. 

(a) Comments Due Date 

We must receive comments by May 8, 

2012. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Honeywell 

International, Inc. ALF502L–2C; ALF502R–3; 

ALF502R–3A; ALF502R–5; LF507–1F; and 

LF507–1H turbofan engines. 

(d) Unsafe Condition 

This AD was prompted by two reports of 

engines experiencing uncontained release of 

low-pressure (LP) turbine blades. We are 

issuing this AD to prevent LP turbine 

overspeed leading to uncontained release of 

the LP turbine blades and damage to the 

airplane. 

(e) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(f) Initial Check of the Overspeed Trip 

System 

Within 30 operating hours after the 

effective date of this AD, perform an initial 

check of the overspeed trip system, in 

accordance with the applicable engine 

manual section listed in Table 1 of this AD. 

TABLE 1—APPLICABLE ENGINE MANUAL SECTIONS

For ALF502L–2C Engines ........................................................................ Use Honeywell ALF502L Engine Maintenance Manual Section 72–00– 

00, Inspection/Check-10, 1.B.(1) through 1.B.(3), dated October 31, 

2000. 

For ALF502R–3; ALF502R–3A; and ALF502R–5 Engines ..................... Use Honeywell ALF502R Engine Manual Section 72–00–00, Inspection/Check-09, 1.C.(1), dated July 31, 2000. 

For LF507–1F Engines ............................................................................. Use Honeywell LF507–1F Engine Manual Section 72–00–00, Inspection/Check-08, Temporary Revision 72–146 1.B.(1) through B.(8), 

dated November 3, 2006. 

For LF507–1H Engines ............................................................................ Use Honeywell LF507–1H Engine Manual Section 72–00–00, Inspection/Check-08, 1.C.(1), dated September 30, 1999. 

(g) Repetitive Checks of the Overspeed Trip 

System 

(1) For ALF502L–2C engines, perform 

repetitive checks of the overspeed trip system 

at 100-hour intervals of operation, in 

accordance with the applicable engine 

manual section listed in Table 1 of this AD. 

(2) For ALF502R–3; ALF502R–3A; 

ALF502R–5; LF507–1F; and LF507–1H 

engines, perform repetitive checks of the 

overspeed trip system once every flight day, 

in accordance with the applicable engine 

manual section listed in Table 1 of this AD. 

(h) Definition 

For the purpose of this AD, a flight day is 

a 24-hour period during which at least one 

flight is indicated. 

(i) Signing Off of Daily Repetitive Checks 

Upon starting the daily repetitive checks, 

only one sign-off is required attesting to the 

daily check implementation. 

(j) Alternative Methods of Compliance 

(AMOCs) 

The Manager, Los Angeles Aircraft 

Certification Office, may approve AMOCs for 

this AD. Use the procedures found in 14 CFR 

39.19 to make your request. 

(k) Related Information 

(1) For more information about this AD, 

contact Robert Baitoo, Aerospace Engineer, 

Los Angeles Aircraft Certification Office, 

FAA, 3960 Paramount Blvd., Lakewood, CA 

90712; phone: 562–627–5245; fax: 562–627– 

5210; email: robert.baitoo@faa.gov. 

(2) For service information identified in 

this AD, contact Honeywell International, 

Inc., P.O. Box 52181, Phoenix, AZ 85072– 

2181, phone: 800–601–3099; Web site: http:// 

portal.honeywell.com/wps/portal/aero. You 

may review copies of the referenced service 

information at the FAA, Engine & Propeller 

Directorate, 12 New England Executive Park, 

Burlington, MA. For information on the 

availability of this material at the FAA, call 

781–238–7125. 

Issued in Burlington, Massachusetts, on 

March 1, 2012. 

Peter A. White, 

Manager Engine & Propeller Directorate, 

Aircraft Certification Service. 

[FR Doc. 2012–5790 Filed 3–8–12; 8:45 am] 

BILLING CODE 4910–13–P 


sroberts on DSK5SPTVN1PROD with PROPOSALS