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

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REGISTER issue of each week.

Rules and Regulations Federal Register

32251 

Vol. 75, No. 109 

Tuesday, June 8, 2010 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0250 Directorate 

Identifier 2010–CE–011–AD; Amendment 

39–16325; AD 2010–12–04] 

RIN 2120–AA64 

Airworthiness Directives; PILATUS 

Aircraft Ltd. Model PC–7 Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final Rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for the 

products listed above. This AD results 

from mandatory continuing 

airworthiness information (MCAI) 

issued by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The MCAI describes the unsafe 

condition as: 

This Airworthiness Directive (AD) is 

prompted due to the discovery of corrosion 

at the bonding strap connections on the left 

and right lower longerons between fuselage 

frames 1 and 1A. The possibility of corrosion 

is increased because of the high electrical 

current flow between the tinned copper 

terminal lug of the bonding strap and the 

aluminum longeron. 

Such a condition, if left uncorrected, could 

lead to failure of the longeron and will 

prejudice the structural integrity of the 

aircraft. 

We are issuing this AD to require 

actions to correct the unsafe condition 

on these products. 

DATES: This AD becomes effective July 

13, 2010. 

On July 13, 2010, the Director of the 

Federal Register approved the 

incorporation by reference of certain 

publications listed in this AD. 

ADDRESSES: You may examine the AD 

docket on the Internet at http:// 

www.regulations.gov or in person at the 

Document Management Facility, U.S. 

Department of Transportation, Docket 

Operations, M–30, West Building 

Ground Floor, Room W12–140, 1200 

New Jersey Avenue, SE., Washington, 

DC 20590. 

FOR FURTHER INFORMATION CONTACT: 

Doug Rudolph, Aerospace Engineer, 

FAA, Small Airplane Directorate, 901 

Locust, Room 301, Kansas City, 

Missouri 64106; telephone: (816) 329– 

4059; fax: (816) 329–4090. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an AD that would 

apply to the specified products. That 

NPRM was published in the Federal 

Register on March 15, 2010 (75 FR 

12150). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 

This Airworthiness Directive (AD) is 

prompted due to the discovery of corrosion 

at the bonding strap connections on the left 

and right lower longerons between fuselage 

frames 1 and 1A. The possibility of corrosion 

is increased because of the high electrical 

current flow between the tinned copper 

terminal lug of the bonding strap and the 

aluminum longeron. 

Such a condition, if left uncorrected, could 

lead to failure of the longeron and will 

prejudice the structural integrity of the 

aircraft. 

In order to correct and control the 

situation, this AD requires a one time 

inspection of the longeron structure and the 

terminal lugs of the bonding straps for signs 

of corrosion. 

For left and right lower longerons where 

corrosion is found during the 

inspection, the MCAI also requires 

repair of any longeron where corrosion 

is found. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

considered the comment received. The 

commenter supports the NPRM. 

Conclusion 

We reviewed the available data, 

including the comment received, and 

determined that air safety and the 

public interest require adopting the AD 

as proposed. 

Differences Between This AD and the 

MCAI or Service Information 

We have reviewed the MCAI and 

related service information and, in 

general, agree with their substance. But 

we might have found it necessary to use 

different words from those in the MCAI 

to ensure the AD is clear for U.S. 

operators and is enforceable. In making 

these changes, we do not intend to differ 

substantively from the information 

provided in the MCAI and related 

service information. 

We might also have required different 

actions in this AD from those in the 

MCAI in order to follow FAA policies. 

Any such differences are highlighted in 

a Note within the AD. 

Costs of Compliance 

We estimate that this AD will affect 

10 products of U.S. registry. We also 

estimate that it will take about 4.5 workhours per product to comply with the 

basic requirements of this AD. The 

average labor rate is $85 per work-hour. 

Based on these figures, we estimate 

the cost of this AD to the U.S. operators 

to be $3,825 or $383 per product. 

In addition, we estimate that any 

necessary follow-on actions will take 

about 3 work-hours and require parts 

costing $500, for a cost of $755 per 

product. We have no way of 

determining the number of products 

that may need these actions. 

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. 


srobinson on DSKHWCL6B1PROD with RULES
32252 Federal Register / Vol. 75, No. 109 / Tuesday, June 8, 2010 / Rules and Regulations 

Regulatory Findings 

We 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 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify 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 regulatory evaluation 

of the estimated costs to comply with 

this AD and placed it in the AD Docket. 

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 the NPRM, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Office 

(telephone (800) 647–5527) is in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

Adoption of the Amendment 

■ Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA 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 AD: 

2010–12–04 PILATUS Aircraft Ltd.: 

Amendment 39–16325; Docket No. 

FAA–2010–0250; Directorate Identifier 

2010–CE–011–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective July 13, 2010. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Model PC–7 

airplanes, all serial numbers, certificated in 

any category. 

Subject 

(d) Air Transport Association of America 

(ATA) Code 53: Fuselage. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

This Airworthiness Directive (AD) is 

prompted due to the discovery of corrosion 

at the bonding strap connections on the left 

and right lower longerons between fuselage 

frames 1 and 1A. The possibility of corrosion 

is increased because of the high electrical 

current flow between the tinned copper 

terminal lug of the bonding strap and the 

aluminum longeron. 

Such a condition, if left uncorrected, could 

lead to failure of the longeron and will 

prejudice the structural integrity of the 

aircraft. In order to correct and control the 

situation, this AD requires a one time 

inspection of the longeron structure and the 

terminal lugs of the bonding straps for signs 

of corrosion. 

For left and right lower longerons where 

corrosion is found during the inspection, the 

MCAI also requires repair of any longeron 

where corrosion is found. 

Actions and Compliance 

(f) Unless already done, do the following 

actions: 

(1) Within the next 120 days after July 13, 

2010 (the effective date of this AD), perform 

a visual inspection of the forward bonding 

points and the terminal lugs on the left and 

right lower longerons between fuselage 

frames 1 and 1A for signs of corrosion. Do 

the inspection following paragraphs 3.C.(1), 

(2), and (3) of PILATUS PC–7 Service 

Bulletin No. 53–007, dated January 5, 2010. 

(2) If any signs of corrosion are found 

during the inspection required in paragraph 

(f)(1) of this AD, prior to further flight, 

perform corrective actions in accordance 

with the Accomplishment Instructions in 

paragraph 3.D of PILATUS PC–7 SB No. 53– 

007, dated January 5, 2010. If the corrosion 

damage is out of limits, record the values; 

apply to PILATUS for a repair scheme at: 

PILATUS AIRCRAFT LTD., Customer Service 

Manager, CH–6371 STANS, Switzerland; 

telephone: +41 (0) 41 619 62 08; fax: +41 (0) 

41 619 73 11; and implement the repair 

scheme. 

Note 1: The Federal Office of Civil 

Aviation (FOCA), which is the airworthiness 

authority for Switzerland, will work with 

PILATUS in reviewing the results of the 

initial inspection as specified in PILATUS 

PC–7 Service Bulletin No. 53–007, dated 

January 5, 2010. From this, a repetitive 

inspection requirement or other action may 

be established. The FAA will evaluate any 

such action and determine whether further 

rulemaking is necessary. 

FAA AD Differences 

Note 2: This AD differs from the MCAI 

and/or service information as follows: No 

differences. 

Other FAA AD Provisions 

(g) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, Standards Office, 

FAA, has the authority to approve AMOCs 

for this AD, if requested using the procedures 

found in 14 CFR 39.19. Send information to 

Attn: Doug Rudolph, Aerospace Engineer, 

FAA, Small Airplane Directorate, 901 Locust, 

Room 301, Kansas City, Missouri 64106; 

telephone: (816) 329–4059; fax: (816) 329– 

4090. Before using any approved AMOC on 

any airplane to which the AMOC applies, 

notify your appropriate principal inspector 

(PI) in the FAA Flight Standards District 

Office (FSDO), or lacking a PI, your local 

FSDO. 

(2) Airworthy Product: For any requirement 

in this AD to obtain corrective actions from 

a manufacturer or other source, use these 

actions if they are FAA-approved. Corrective 

actions are considered FAA-approved if they 

are approved by the State of Design Authority 

(or their delegated agent). You are required 

to assure the product is airworthy before it 

is returned to service. 

(3) Reporting Requirements: For any 

reporting requirement in this AD, under the 

provisions of the Paperwork Reduction Act 

(44 U.S.C. 3501 et seq.), the Office of 

Management and Budget (OMB) has 

approved the information collection 

requirements and has assigned OMB Control 

Number 2120–0056. 

Related Information 

(h) Refer to MCAI FOCA AD HB–2010–001, 

dated February 12, 2010; and PILATUS 

PC–7 Service Bulletin No. 53–007, dated 

January 5, 2010, for related information. 

Material Incorporated by Reference 

(i) You must use PILATUS PC–7 Service 

Bulletin No. 53–007, dated January 5, 2010, 

to do the actions required by this AD, unless 

the AD specifies otherwise. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

this service information under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(2) For service information identified in 

this AD, contact PILATUS AIRCRAFT LTD., 

Customer Service Manager, CH–6371 

STANS, Switzerland; telephone: +41 (0) 41 

619 62 08; fax: +41 (0) 41 619 73 11; Internet: 

http://www.pilatus-aircraft.com. 

(3) You may review copies of the service 

information incorporated by reference for 

this AD at the FAA, Central Region, Office of 

the Regional Counsel, 901 Locust, Kansas 

City, Missouri 64106. For information on the 

availability of this material at the Central 

Region, call (816) 329–3768. 

(4) You may also review copies of the 

service information incorporated by reference 

for this AD at the National Archives and 

Records Administration (NARA). For 


srobinson on DSKHWCL6B1PROD with RULES
Federal Register / Vol. 75, No. 109 / Tuesday, June 8, 2010 / Rules and Regulations 32253 

information on the availability of this 

material at NARA, call (202) 741–6030, or go 

to: http://www.archives.gov/federal_register/ 

code_of_federal_regulations/ 

ibr_locations.html. 

Issued in Kansas City, Missouri, on May 

27, 2010. 

Steven W. Thompson, 

Acting Manager, Small Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2010–13400 Filed 6–7–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–0201; Directorate 

Identifier 2008–NE–47–AD; Amendment 39– 

16314; AD 2010–11–09] 

RIN 2120–AA64 

Airworthiness Directives; Thielert 

Aircraft Engines GmbH (TAE) Models 

TAE 125–01 and TAE 125–02–99 

Reciprocating Engines Installed in, but 

Not Limited to, Diamond Aircraft 

Industries Model DA 42 Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for the 

products listed above. This AD results 

from mandatory continuing 

airworthiness information (MCAI) 

issued by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The MCAI describes the unsafe 

condition as: 

Engine in-flight shutdown incidents have 

been reported on Diamond Aircraft Industries 

DA 42 airplanes equipped with TAE 125 

engines. The investigations showed that it 

was mainly the result of failure of the 

Proportional Pressure Reducing Valve (PPRV) 

(also known as Propeller Control Valve) due 

to high vibrations. This condition, if not 

corrected, could lead to further cases of 

engine in-flight shutdown, possibly resulting 

in reduced control of the aircraft. 

Since the release of European Aviation 

Safety Agency (EASA) AD 2008–0145, the 

engine gearbox has been identified as the 

primary source of vibrations for the PPRV, 

and it has also been determined that failure 

of the electrical connection to the PPRV 

could have contributed to some power loss 

events or in-flight shutdowns. 

We are issuing this AD to prevent 

engine in-flight shutdown, possibly 

resulting in reduced control of the 

aircraft. 

DATES: This AD becomes effective July 

13, 2010. The Director of the Federal 

Register approved the incorporation by 

reference of certain publications listed 

in this AD as of July 13, 2010. 

ADDRESSES: 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: Tara 

Chaidez, Aerospace Engineer, Engine 

Certification Office, FAA, Engine and 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

e-mail: tara.chaidez@faa.gov; telephone 

(781) 238–7773; fax (781) 238–7199. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) and a supplemental 

NPRM to amend 14 CFR part 39 to 

include an AD that would apply to the 

specified products. That NPRM was 

published in the Federal Register on 

April 17, 2009 (74 FR 17795) and that 

supplemental NPRM was published in 

the Federal Register on February 23, 

2010 (75 FR 7996). That supplemental 

NPRM proposed to correct an unsafe 

condition for the specified products. 

The MCAI states that: 

Engine in-flight shutdown incidents have 

been reported on Diamond Aircraft Industries 

DA 42 airplanes equipped with TAE 125 

engines. The investigations showed that it 

was mainly the result of failure of the 

Proportional Pressure Reducing Valve (PPRV) 

(also known as Propeller Control Valve) due 

to high vibrations. This condition, if not 

corrected, could lead to further cases of 

engine in-flight shutdown, possibly resulting 

in reduced control of the aircraft. 

Since the release of European Aviation 

Safety Agency (EASA) AD 2008–0145, the 

engine gearbox has been identified as the 

primary source of vibrations for the PPRV, 

and it has also been determined that failure 

of the electrical connection to the PPRV 

could have contributed to some power loss 

events or in-flight shutdowns. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

received no comments on the 

supplemental NPRM or on the 

determination of the cost to the public. 

Conclusion 

We reviewed the available data and 

determined that air safety and the 

public interest require adopting the AD 

as proposed. 

Differences Between This AD and the 

MCAI or Service Information 

We have reviewed the MCAIs and, in 

general, agree with their substance. But 

we have found it necessary to not 

reference the second paragraph of the 

unsafe condition from EASA AD 2009– 

0224. That sentence stated that the 

problem has only manifested itself on 

those Thielert engines installed on 

Diamond Aircraft Industries DA 42 

aircraft. The affected engines which 

require a PPRV could be used on other 

make and model airplanes in the future. 

We also did not incorporate the 

February 28, 2010 compliance date 

which is in EASA AD 2009–0193R1, or 

the January 31, 2010 compliance date 

which is in EASA AD 2009–0224. 

Costs of Compliance 

Based on the service information, we 

estimate that this AD will affect about 

300 TAE 125–01 and TAE 125–02–99 

reciprocating engines installed in 

Diamond Aircraft Industries Model DA 

42 airplanes of U.S. registry. We also 

estimate that it will take about 0.25 

work-hour per engine to replace a PPRV 

and install a vibration isolator to the 

gearbox assembly. The average labor 

rate is $85 per work-hour. Required 

parts will cost about $275 per product. 

Based on these figures, we estimate the 

cost of the AD on U.S. operators to be 

$88,875. 

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 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 

responsibilities among the various 

levels of government. 


srobinson on DSKHWCL6B1PROD with RULES