This section of the FEDERAL REGISTER

contains regulatory documents having general

applicability and legal effect, most of which

are keyed to and codified in the Code of

Federal Regulations, which is published under

50 titles pursuant to 44 U.S.C. 1510.

The Code of Federal Regulations is sold by

the Superintendent of Documents. Prices of

new books are listed in the first FEDERAL

REGISTER issue of each week.

Rules and Regulations Federal Register

54491 

Vol. 73, No. 184 

Monday, September 22, 2008 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2008–0264; Directorate 

Identifier 2008–NE–07–AD; Amendment 39– 

15679; AD 2008–19–12] 

RIN 2120–AA64 

Airworthiness Directives; Honeywell 

International Inc. TFE731–4, –4R, –5, 

–5AR, –5BR, and –5R Series Turbofan 

Engines 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for 

Honeywell International Inc. TFE731–4, 

–4R, –5, –5AR, –5BR, and –5R series 

turbofan engines, with interstage turbine 

transition (ITT) duct, part number (P/N) 

3075292–1; 3075292–3; 3074766–1; 

3077063–1; 3075655–1; 3075655–2; 

3075699–1; or 3075699–3, installed. 

This AD requires replacing the affected 

ITT duct with a serviceable and 

redesigned ITT duct. This AD results 

from reports of 49 low-pressure turbine 

(LPT) blade separation events. Six of 

those events resulted in circumferential 

failure of the LPT2 or LPT3 nozzle 

assembly, leading to deformation of the 

ITT duct and uncontainment of the 

turbine blades and fragments of the LPT 

nozzle assembly. We are issuing this AD 

to prevent uncontainment of turbine 

blades and fragments of the LPT nozzle 

assembly, which could result in damage 

to the airplane. 

DATES: This AD becomes effective 

October 27, 2008. 

ADDRESSES: You can get the service 

information identified in this AD from 

Honeywell Engines and Systems 

Technical Publications and Distribution, 

M/S 2101–201, P.O. Box 52170, 

Phoenix, AZ 85072–2170, telephone: 

(602) 365–2493 (General Aviation), 

(602) 365–5535 (Commercial Aviation), 

fax: (602) 365–5577 (General Aviation 

and Commercial Aviation). 

The Docket Operations office is 

located at Docket Management Facility, 

U.S. Department of Transportation, 1200 

New Jersey Avenue SE., West Building 

Ground Floor, Room W12–140, 

Washington, DC 20590–0001. 

FOR FURTHER INFORMATION CONTACT: 

Joseph Costa, Aerospace Engineer, Los 

Angeles Aircraft Certification Office, 

FAA, Transport Airplane Directorate, 

3960 Paramount Blvd., Lakewood, CA 

90712–4137; e-mail: 

joseph.costa@faa.gov; telephone: (562) 

627–5246; fax: (562) 627–5210. 

SUPPLEMENTARY INFORMATION: The FAA 

proposed to amend 14 CFR part 39 with 

a proposed AD. The proposed AD 

applies to Honeywell International Inc. 

TFE731–4, –4R, –5, –5AR, –5BR, and 

–5R series turbofan engines, with ITT 

duct, P/N 3075292–1; 3075292–3; 

3074766–1; 3077063–1; 3075655–1; 

3075655–2; 3075699–1; or 3075699–3, 

installed. We published the proposed 

AD in the Federal Register on April 4, 

2008 (73 FR 18461). That action 

proposed to require replacing the 

affected ITT duct with a serviceable and 

redesigned ITT duct. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Operations office between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this AD, the regulatory 

evaluation, any comments received, and 

other information. The street address for 

the Docket Operations office (telephone 

(800) 647–5527) is provided in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

Comments 

We provided the public the 

opportunity to participate in the 

development of this AD. We received no 

comments on the proposal or on the 

determination of the cost to the public. 

However, we did find that we 

misidentified two part numbers in the 

Summary and Applicability Sections of 

the NPRM. We identified in the NPRM 

P/Ns 30756599–1; or 30756599–3 that 

should have been identified as P/Ns 

3075699–1; or 3075699–3. We changed 

the AD to use the correct P/Ns. We also 

changed the AD by adding a prohibition 

of affected ITT ducts, for clarity. 

Conclusion 

We have carefully reviewed the 

available data and determined that air 

safety and the public interest require 

adopting the AD with the change 

described previously. 

Costs of Compliance 

We estimate that this AD will affect 

1,500 engines installed on airplanes of 

U.S. registry. We also estimate that it 

will take about 4 work-hours per engine 

to perform the actions, and that the 

average labor rate is $80 per work-hour. 

Reworked ITT ducts to the redesign will 

cost about $25,000 per engine. New ITT 

ducts that are redesigned will cost about 

$127,000. We estimate that 30 engines 

will require new ITT ducts. Based on 

these figures, we estimate the total cost 

of the AD to U.S. operators to be 

$41,040,000. 

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 have determined that this AD will 

not have federalism implications under 

Executive Order 13132. This AD will 

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 


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54492 Federal Register / Vol. 73, No. 184 / Monday, September 22, 2008 / Rules and Regulations 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify that this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866; 

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

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979); and 

(3) 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. 

We prepared a summary of the costs 

to comply with this AD and placed it in 

the AD Docket. You may get a copy of 

this summary at the address listed 

under ADDRESSES. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Safety. 

Adoption of the Amendment 

■ Accordingly, under the authority 

delegated to me by the Administrator, 

the Federal Aviation Administration 

amends 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: 

2008–19–12 Honeywell International Inc. 

(formerly AlliedSignal Inc., formerly 

Garret Turbine Engine Company): 

Amendment 39–15679. Docket No. 

FAA–2008–0264; Directorate Identifier 

2008–NE–07–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective October 27, 2008. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Honeywell 

International Inc. TFE731–4, –4R, –5, –5AR, 

–5BR, and –5R series turbofan engines, with 

interstage turbine transition (ITT) duct, part 

number (P/N) 3075292–1; 3075292–3; 

3074766–1; 3077063–1; 3075655–1; 

3075655–2; 3075699–1; or 3075699–3, 

installed. These engines are installed on, but 

not limited to, Avions Marcel Dassault 

Mystere-Falcon 50 series, Dassault-Aviation 

20, 50, 900, MF900 series, Cessna Model 650, 

Cessna Citation VII, and Raytheon Corporate 

Jets (formerly British Aerospace) Hawker 800 

and 850XP series airplanes. 

Unsafe Condition 

(d) This AD results from reports of 49 lowpressure turbine (LPT) blade separation 

events. Six of those events resulted in 

circumferential failure of the LPT2 or LPT3 

nozzle assembly, leading to deformation of 

the ITT duct and uncontainment of the 

turbine blades and fragments of the LPT 

nozzle assembly. We are issuing this AD to 

prevent uncontainment of turbine blades and 

fragments of the LPT nozzle assembly, which 

could result in damage to the airplane. 

Compliance 

(e) You are responsible for having the 

actions required by this AD performed at the 

next Major Periodic Inspection of the engine 

or at next access of the ITT duct, whichever 

occurs first, but not to exceed 2,600 hours 

time-in-service after the effective date of this 

AD, unless the actions have already been 

done. 

Replacement of the ITT Duct 

(f) Replace the affected ITT ducts listed by 

part number in paragraph (c) of this AD, with 

a serviceable and redesigned ITT duct. 

Definitions 

(g) For the purpose of this AD, a 

serviceable and redesigned ITT duct is one 

not having a part number listed in this AD. 

(h) For the purpose of this AD, next access 

of the ITT duct is when the ITT duct is 

removed from the engine. 

Prohibition of Affected ITT Ducts 

(i) After the effective date of this AD, do 

not install any ITT duct listed by P/N in 

paragraph (c) of this AD, onto any engine. 

Alternative Methods of Compliance 

(j) The Manager, Los Angeles Aircraft 

Certification Office, has the authority to 

approve alternative methods of compliance 

for this AD if requested using the procedures 

found in 14 CFR 39.19. 

Related Information 

(k) Honeywell International Inc. Service 

Bulletin (SB) No. TFE731–72–3727, dated 

September 12, 2007, and SB No. TFE731–72– 

3728, dated September 12, 2007, pertain to 

the subject of this AD. 

(l) Contact Joseph Costa, Aerospace 

Engineer, Los Angeles Aircraft Certification 

Office, FAA, Transport Airplane Directorate, 

3960 Paramount Blvd., Lakewood, CA 

90712–4137; e-mail: joseph.costa@faa.gov; 

telephone: (562) 627–5246; fax: (562) 627– 

5210, for more information about this AD. 

Issued in Burlington, Massachusetts, on 

September 12, 2008. 

Peter A. White, 

Assistant Manager, Engine and Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. E8–21835 Filed 9–19–08; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2008–0674; Directorate 

Identifier 2008–NM–086–AD; Amendment 

39–15675; AD 2008–19–08] 

RIN 2120–AA64 

Airworthiness Directives; Dassault 

Model Falcon 10 Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: The FAA is superseding an 

existing airworthiness directive (AD), 

which applies to all Avions Marcel 

Dassault-Breguet Model Falcon 10 

airplanes. That AD currently requires 

either revising the airplane flight 

manual and installing a placard in the 

flight deck to prohibit flight into known 

or forecasted icing conditions, or 

repetitively inspecting for delamination 

of the flexible hoses in the wing (slat) 

anti-icing system and performing 

corrective actions if necessary. The 

existing AD also requires replacement of 

the flexible hoses installed in the slat 

anti-icing systems, which ends the 

repetitive inspections. This new AD 

continues to require replacement of the 

flexible hoses installed in the slat antiicing systems with new hoses, but at 

intervals defined in flight hours instead 

of flight cycles. This AD results from 

information we received from operators 

and the airplane manufacturer 

indicating that the repetitive interval for 

the required replacement deviated from 

the referenced service information. We 

are issuing this AD to prevent collapse 

of the flexible hoses in the slat anti-icing 

system, which could lead to insufficient 

anti-icing capability and, if icing is 

encountered in this situation, could 

result in reduced controllability of the 

airplane. 

DATES: This AD becomes effective 

October 27, 2008. 

On October 11, 2007 (72 FR 51161, 

September 6, 2007), the Director of the 

Federal Register approved the 

incorporation by reference of Dassault 

Service Bulletin F10–313, Revision 1, 

dated May 10, 2006. 

ADDRESSES: For service information 

identified in this AD, contact Dassault 

Falcon Jet, P.O. Box 2000, South 

Hackensack, New Jersey 07606. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 


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