This section of the FEDERAL REGISTER

contains notices to the public of the proposed

issuance of rules and regulations. The

purpose of these notices is to give interested

persons an opportunity to participate in the

rule making prior to the adoption of the final

rules.

Proposed Rules Federal Register

43092 

Vol. 75, No. 141 

Friday, July 23, 2010 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0699; Directorate 

Identifier 2009–NM–236–AD] 

RIN 2120–AA64 

Airworthiness Directives; Viking Air 

Limited (Type Certificate Previously 

Held by Bombardier, Inc.) Model DHC– 

7 Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for the 

products listed above. This proposed 

AD results from mandatory continuing 

airworthiness information (MCAI) 

originated 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: 

Viking Air Limited has completed a system 

safety review of the aircraft fuel system 

against fuel tank safety standards introduced 

in Chapter 525 of the Airworthiness Manual 

through Notice of Proposed Amendment 

(NPA) 2002–043. The identified noncompliances were then assessed using 

Transport Canada Policy Letter No. 525–001, 

to determine if mandatory corrective action 

is required. 

The assessment showed that supplemental 

maintenance tasks would be required to 

prevent potential ignition sources within the 

fuel system, which could result in a fuel tank 

explosion. * * * 

The proposed AD would require 

actions that are intended to address the 

unsafe condition described in the MCAI. 

DATES: We must receive comments on 

this proposed AD by September 7, 2010. 

ADDRESSES: You may send comments 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: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–40, 1200 New Jersey Avenue, SE., 

Washington, DC, between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this proposed AD, contact Viking Air 

Limited, 9574 Hampden Road, Sidney, 

British Columbia V8L 8V5, Canada; 

telephone 250–656–7227; fax 250–656– 

0673; e-mail 

technical.publications@vikingair.com; 

Internet http://www.vikingair.com. You 

may review copies of the referenced 

service information at the FAA, 

Transport Airplane Directorate, 1601 

Lind Avenue, SW., Renton, Washington. 

For information on the availability of 

this material at the FAA, call 425–227– 

1221. 

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 proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Operations 

office (telephone (800) 647–5527) is in 

the ADDRESSES section. Comments will 

be available in the AD docket shortly 

after receipt. 

FOR FURTHER INFORMATION CONTACT: 

Richard Fiesel, Aerospace Engineer, 

Airframe and Mechanical Systems 

Branch, ANE–171, FAA, New York 

Aircraft Certification Office, 1600 

Stewart Avenue, Suite 410, Westbury, 

New York 11590; telephone (516) 228– 

7304; fax (516) 794–5531. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposed AD. Send your comments 

to an address listed under the 

ADDRESSES section. Include ‘‘Docket No. 

FAA–2010–0699; Directorate Identifier 

2009–NM–236–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 based on those comments. 

We have lengthened the 30-day 

comment period for proposed ADs that 

address MCAI originated by aviation 

authorities of other countries to provide 

adequate time for interested parties to 

submit comments. The comment period 

for these proposed ADs is now typically 

45 days, which is consistent with the 

comment period for domestic transport 

ADs. 

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 

The FAA has examined the 

underlying safety issues involved in fuel 

tank explosions on several large 

transport airplanes, including the 

adequacy of existing regulations, the 

service history of airplanes subject to 

those regulations, and existing 

maintenance practices for fuel tank 

systems. As a result of those findings, 

we issued a regulation titled ‘‘Transport 

Airplane Fuel Tank System Design 

Review, Flammability Reduction and 

Maintenance and Inspection 

Requirements’’ (66 FR 23086, May 7, 

2001). In addition to new airworthiness 

standards for transport airplanes and 

new maintenance requirements, this 

rule included Special Federal Aviation 

Regulation No. 88 (‘‘SFAR 88,’’ 

Amendment 21–78, and subsequent 

Amendments 21–82 and 21–83). 

Among other actions, SFAR 88 

requires certain type design (i.e., type 

certificate (TC) and supplemental type 

certificate (STC)) holders to substantiate 

that their fuel tank systems can prevent 

ignition sources in the fuel tanks. This 

requirement applies to type design 

holders for large turbine-powered 

transport airplanes and for subsequent 

modifications to those airplanes. It 

requires them to perform design reviews 

and to develop design changes and 

maintenance procedures if their designs 

do not meet the new fuel tank safety 

standards. As explained in the preamble 

to the rule, we intended to adopt 

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Federal Register / Vol. 75, No. 141 / Friday, July 23, 2010 / Proposed Rules 43093 

airworthiness directives to mandate any 

changes found necessary to address 

unsafe conditions identified as a result 

of these reviews. 

In evaluating these design reviews, we 

have established four criteria intended 

to define the unsafe conditions 

associated with fuel tank systems that 

require corrective actions. The 

percentage of operating time during 

which fuel tanks are exposed to 

flammable conditions is one of these 

criteria. The other three criteria address 

the failure types under evaluation: 

Single failures, single failures in 

combination with a latent condition(s), 

and in-service failure experience. For all 

four criteria, the evaluations included 

consideration of previous actions taken 

that may mitigate the need for further 

action. 

We have determined that the actions 

identified in this AD are necessary to 

reduce the potential of ignition sources 

inside fuel tanks, which, in combination 

with flammable fuel vapors, could result 

in fuel tank explosions and consequent 

loss of the airplane. 

Transport Canada Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued Canadian 

Airworthiness Directive CF–2009–15, 

dated April 17, 2009 (referred to after 

this as ‘‘the MCAI’’), to correct an unsafe 

condition for the specified products. 

The MCAI states: 

Viking Air Limited has completed a system 

safety review of the aircraft fuel system 

against fuel tank safety standards introduced 

in Chapter 525 of the Airworthiness Manual 

through Notice of Proposed Amendment 

(NPA) 2002–043. The identified noncompliances were then assessed using 

Transport Canada Policy Letter No. 525–001, 

to determine if mandatory corrective action 

is required. 

The assessment showed that supplemental 

maintenance tasks would be required to 

prevent potential ignition sources within the 

fuel system, which could result in a fuel tank 

explosion. Viking Air Limited has revised 

Chapter 5 of the DHC–7 Maintenance 

Manual, PSM 1–7–2, to introduce the 

required maintenance tasks. 

The corrective action is revising the 

Airworthiness Limitations Section of 

the Instructions for Continued 

Airworthiness to incorporate new 

limitations for fuel tank systems. You 

may obtain further information by 

examining the MCAI in the AD docket. 

Relevant Service Information 

Viking Air Limited has issued 

Temporary Revisions 5–106, 5–107, 5– 

108, 5–109, 5–110, 5–111, 5–112, and 5– 

113, all dated December 15, 2008, to the 

Viking DHC–7 Dash 7 Maintenance 

Manual, PSM–1–7–2, Chapter 5. The 

actions described in this service 

information are intended to correct the 

unsafe condition identified in the 

MCAI. 

FAA’s Determination and Requirements 

of This Proposed AD 

This product has been approved by 

the aviation authority of another 

country, and is approved for operation 

in the United States. Pursuant to our 

bilateral agreement with the State of 

Design Authority, we have been notified 

of the unsafe condition described in the 

MCAI and service information 

referenced above. We are proposing this 

AD because we evaluated all pertinent 

information and determined an unsafe 

condition exists and is likely to exist or 

develop on other products of the same 

type design. 

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 proposed 

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 

proposed AD. 

Costs of Compliance 

Based on the service information, we 

estimate that this proposed AD would 

affect about 11 products of U.S. registry. 

We also estimate that it would take 

about 1 work-hour per product to 

comply with the basic requirements of 

this proposed AD. The average labor 

rate is $85 per work-hour. Based on 

these figures, we estimate the cost of the 

proposed AD on U.S. operators to be 

$935, or $85 per product. 

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); 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 proposed AD and placed it in the 

AD docket. 

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 AD: 

Viking Air Limited (Type Certificate 

Previously Held by Bombardier, Inc.): 

Docket No. FAA–2010–0699; Directorate 

Identifier 2009–NM–236–AD. 

Comments Due Date 

(a) We must receive comments by 

September 7, 2010. 

Affected ADs 

(b) None. 

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43094 Federal Register / Vol. 75, No. 141 / Friday, July 23, 2010 / Proposed Rules 

Applicability 

(c) This AD applies to Viking Air Limited 

(Type Certificate previously held by 

Bombardier, Inc.) Model DHC–7–1, DHC–7– 

100, DHC–7–101, DHC–7–102, and DHC–7– 

103 airplanes; certificated in any category. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 28: Fuel. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

Viking Air Limited has completed a system 

safety review of the aircraft fuel system 

against fuel tank safety standards introduced 

in Chapter 525 of the Airworthiness Manual 

through Notice of Proposed Amendment 

(NPA) 2002–043. The identified noncompliances were then assessed using 

Transport Canada Policy Letter No. 525–001, 

to determine if mandatory corrective action 

is required. 

The assessment showed that supplemental 

maintenance tasks would be required to 

prevent potential ignition sources within the 

fuel system, which could result in a fuel tank 

explosion. * * * 

The corrective action is revising the 

Airworthiness Limitations Section of the 

Instructions for Continued Airworthiness to 

incorporate new limitations for fuel tank 

systems. 

Compliance 

(f) You are responsible for having the 

actions required by this AD performed within 

the compliance times specified, unless the 

actions have already been done. 

Actions 

(g) Within 60 days after the effective date 

of this AD, incorporate all the fuel system 

limitation (FSL) tasks as specified in the 

temporary revisions (TR) listed in Table 1 of 

this AD, to Chapter 5 of the Viking DHC–7 

Dash 7 Maintenance Manual (MM), PSM 1– 

7–2; and incorporate Section 5–10–30, as 

specified in Viking Air Limited TR 5–106, 

dated December 15, 2008, to Chapter 5 of the 

Viking DHC–7 Dash 7 MM. 

Note 1: This may be done by inserting 

copies of the TRs identified in paragraph (g) 

of this AD in the MM. When these TRs have 

been included in general revisions of the 

MM, the general revisions may be inserted in 

the MM, provided the relevant information in 

the general revision is identical to that in the 

TRs identified in paragraph (g) of this AD. 

(h) At the applicable time in paragraphs 

(h)(1), (h)(2), (h)(3), and (h)(4) of this AD, do 

the initial inspections in accordance with the 

applicable TR identified in Table 1 of this 

AD. 

(1) For Tasks FSL–01, FSL–02, FSL–03, 

FSL–04 and FSL–05: Inspect at the later of 

the times in paragraphs (h)(1)(i) and (h)(1)(ii) 

of this AD. 

(i) Prior to the accumulation of 18,000 total 

flight hours. 

(ii) Within 6,000 flight hours or within 36 

months after the effective date of this AD, 

whichever occurs first. 

(2) For Task FSL–06: Inspect at the later of 

the times in paragraphs (h)(2)(i) and (h)(2)(ii) 

of this AD. 

(i) Prior to the accumulation of 40,000 total 

flight hours. 

(ii) Within 6,000 flight hours or within 36 

months after the effective date of this AD, 

whichever occurs first. 

(3) For Task FSL–07: Within 1 month after 

the effective date of this AD. 

(4) For Task FSL–08: Inspect at the later of 

the times in paragraphs (h)(4)(i) and (h)(4)(ii) 

of this AD. 

(i) Prior to the accumulation of 4,000 total 

flight hours. 

(ii) Within 2,000 flight hours or within 12 

months after the effective date of this AD, 

whichever occurs first. 

TABLE 1—TEMPORARY REVISIONS

Task Viking Air Limited 

TR Date 

FSL–01 .................................................................................................................................................... 5–107 December 15, 2008. 

FSL–02 .................................................................................................................................................... 5–108 December 15, 2008. 

FLS–06 .................................................................................................................................................... 5–109 December 15, 2008. 

FSL–07 .................................................................................................................................................... 5–110 December 15, 2008. 

FSL–08 .................................................................................................................................................... 5–111 December 15, 2008. 

FSL–03 .................................................................................................................................................... 5–112 December 15, 2008. 

FSL–04 and FSL–05 ............................................................................................................................... 5–113 December 15, 2008. 

FAA AD Differences 

Note 2: This AD differs from the MCAI 

and/or service information as follows: No 

differences. 

Other FAA AD Provisions 

(i) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York Aircraft 

Certification Office (ACO), ANE–170, 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: 

Program Manager, Continuing Operational 

Safety, FAA, New York ACO, 1600 Stewart 

Avenue, Suite 410, Westbury, New York, 

11590; telephone 516–228–7300; fax 516– 

794–5531. Before using any approved AMOC 

on any airplane to which the AMOC applies, 

notify your principal maintenance inspector 

(PMI) or principal avionics inspector (PAI), 

as appropriate, or lacking a principal 

inspector, your local Flight Standards District 

Office. The AMOC approval letter must 

specifically reference this AD. 

(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 FAAapproved 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 

(j) Refer to MCAI Canadian Airworthiness 

Directive CF–2009–15, dated April 17, 2009; 

and the TRs identified in Table 2 of this AD 

for related information. 

TABLE 2—SERVICE INFORMATION

Viking Air Limited TR— To the— Dated— 

5–106 .................................................... Viking DHC–7 Dash 7 MM, PSM 1–7–2 ............................................................. December 15, 2008. 

5–107 .................................................... Viking DHC–7 Dash 7 MM, PSM 1–7–2 ............................................................. December 15, 2008. 

5–108 .................................................... Viking DHC–7 Dash 7 MM, PSM 1–7–2 ............................................................. December 15, 2008. 

5–109 .................................................... Viking DHC–7 Dash 7 MM, PSM 1–7–2 ............................................................. December 15, 2008. 

5–110 .................................................... Viking DHC–7 Dash 7 MM, PSM 1–7–2 ............................................................. December 15, 2008. 

5–111 .................................................... Viking DHC–7 Dash 7 MM, PSM 1–7–2 ............................................................. December 15, 2008. 

5–112 .................................................... Viking DHC–7 Dash 7 MM, PSM 1–7–2 ............................................................. December 15, 2008. 

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TABLE 2—SERVICE INFORMATION—Continued 

Viking Air Limited TR— To the— Dated— 

5–113 .................................................... Viking DHC–7 Dash 7 MM, PSM 1–7–2 ............................................................. December 15, 2008. 

Issued in Renton, Washington, on July 15, 

2010. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2010–18059 Filed 7–22–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0737; Directorate 

Identifier 2010–CE–037–AD] 

RIN 2120–AA64 

Airworthiness Directives; PIAGGIO 

AERO INDUSTRIES S.p.A. Model 

PIAGGIO P–180 Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for the 

products listed above. This proposed 

AD results from mandatory continuing 

airworthiness information (MCAI) 

originated 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: 

Some cases of failure of engine oil 

dipsticks, installed on Pratt & Whitney 

Canada (P&WC) PT6A66 and PT6A66B 

engines, were detected on P.180 aeroplanes; 

such failures, due to moisture penetration 

into the dipstick and subsequent corrosion, 

can cause incorrect reading of the engine oil 

low level on the Refuel/Ground Test Panel. 

If left uncorrected, this situation 

could lead to in-flight engine failure(s). 

The proposed AD would require actions 

that are intended to address the unsafe 

condition described in the MCAI. 

DATES: We must receive comments on 

this proposed AD by September 7, 2010. 

ADDRESSES: You may send comments 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: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue, SE., 

Washington, DC 20590, between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. 

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 

(telephone (800) 647–5527) is in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

FOR FURTHER INFORMATION CONTACT: 

Sarjapur Nagarajan, Aerospace Engineer, 

FAA, Small Airplane Directorate, 901 

Locust, Room 301, Kansas City, 

Missouri 64106; telephone: (816) 329– 

4145; fax: (816) 329–4090. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposed AD. Send your comments 

to an address listed under the 

ADDRESSES section. Include ‘‘Docket No. 

FAA–2010–0737; Directorate Identifier 

2010–CE–037–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 

The European Aviation Safety Agency 

(EASA), which is the Technical Agent 

for the Member States of the European 

Community, has issued AD No.: 2010– 

0123, dated June 22, 2010 (referred to 

after this as ‘‘the MCAI’’), to correct an 

unsafe condition for the specified 

products. The MCAI states: 

Some cases of failure of engine oil 

dipsticks, installed on Pratt & Whitney 

Canada (P&WC) PT6A66 and PT6A66B 

engines, were detected on P.180 aeroplanes; 

such failures, due to moisture penetration 

into the dipstick and subsequent corrosion, 

can cause incorrect reading of the engine oil 

low level on the Refuel/Ground Test Panel. 

If left uncorrected, this situation could lead 

to in-flight engine failure(s). 

This AD requires: 

(1) Repetitive visual checks of the engine 

oil levels to prevent an undetected low level 

condition; 

(2) repetitive inspections of the oil 

dipsticks to detect faulty units; 

(3) replacement of faulty oil dipsticks or 

visual checks of the oil level at reduced not 

to exceed intervals, until replacement of 

faulty units. 

The engine TC Holder is currently 

developing a modification that will address 

the unsafe condition identified in this AD; 

once such modification is developed, 

approved and available, further mandatory 

actions might be considered. 

This Correction is issued to amend the AD 

number heading: it was PAD, it is AD. 

Relevant Service Information 

PIAGGIO AERO INDUSTRIES S.p.A. 

has issued Service Bulletin (Mandatory) 

N.: 80–0287, Rev. N. 1, dated March 24, 

2010. The actions described in this 

service information are intended to 

correct the unsafe condition identified 

in the MCAI. 

FAA’s Determination and Requirements 

of the Proposed AD 

This product has been approved by 

the aviation authority of another 

country, and is approved for operation 

in the United States. Pursuant to our 

bilateral agreement with this State of 

Design Authority, they have notified us 

of the unsafe condition described in the 

MCAI and service information 

referenced above. We are proposing this 

AD because we evaluated all 

information and determined the unsafe 

condition exists and is likely to exist or 

develop on other products of the same 

type design. 

Differences Between This Proposed AD 

and the MCAI or Service Information 

We have reviewed the MCAI and 

related service information and, in 

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