Federal Register / Vol. 75, No. 2 / Tuesday, January 5, 2010 / Rules and Regulations 221 

1252 3252 

1The first two digits identify the bank’s 

Federal Reserve District. For example, 01 

identifies the First Federal Reserve District 

(Boston), and l2 identifies the Twelfth District (San Francisco). Adding 2 to the first 

digit denotes a thrift institution. For example, 21 identifies a thrift in the First District, 

and 32 denotes a thrift in the Twelfth 

District. 

* * * * * 

By order of the Board of Governors of the 

Federal Reserve System, acting through the 

Secretary of the Board under delegated 

authority, December 30, 2009. 

Jennifer J. Johnson, 

Secretary of the Board. 

[FR Doc. E9–31254 Filed 1–4–10; 8:45 am] 

BILLING CODE 6210–01–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–1225; Directorate 

Identifier 2009–NM–257–AD; Amendment 

39–16159; AD 2010–01–03] 

RIN 2120–AA64 

Airworthiness Directives; Fire Fighting 

Enterprises Limited Portable Halon 

1211 Fire Extinguishers as Installed on 

Various Transport Airplanes, Small 

Airplanes, and Rotorcraft 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule; request for 

comments. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for the 

products listed above. This 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: 

The Civil Aviation Authority of the United 

Kingdom (UK) has informed EASA 

[European Aviation Safety Agency] that 

significant quantities of Halon 1211 gas, 

determined to be outside the required 

specification, have been supplied to the 

aviation industry for use in fire extinguishing 

equipment. * * * 

* * * * * 

* * * This Halon 1211 has subsequently 

been used to fill certain FFE [Fire Fighting 

Enterprises] portable cabin and toilet 

compartment fire extinguishers that are now 

likely to be installed in or carried on board 

aircraft. 

The contaminated nature of this gas, when 

used against a fire, may provide reduced fire 

suppression, endangering the safety of the 

aircraft and its occupants. In addition, 

extinguisher activation may lead to release of 

toxic fumes, possibly causing injury to 

aircraft occupants. 

* * * * * 

This AD requires actions that are 

intended to address the unsafe 

condition described in the MCAI. 

DATES: This AD becomes effective 

January 20, 2010. 

We must receive comments on this 

AD by February 19, 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. 

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 in the ADDRESSES

section. Comments will be available in 

the AD docket shortly after receipt. 

FOR FURTHER INFORMATION CONTACT: Dan 

Rodina, Aerospace Engineer, 

International Branch, ANM–116, 

Transport Airplane Directorate, FAA, 

1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone 

(425) 227–2125; fax (425) 227–1149. 

SUPPLEMENTARY INFORMATION: 

Discussion 

The European Aviation Safety Agency 

(EASA), which is the Technical Agent 

for the Member States of the European 

Community, has issued Emergency 

Airworthiness Directive 2009–0251–E, 

dated November 25, 2009, and 

Airworthiness Directive 2009–0262, 

dated December 15, 2009 (referred to 

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

unsafe condition for the specified 

products. EASA AD 2009–0251–E 

states: 

The Civil Aviation Authority of the United 

Kingdom (UK) has informed EASA that 

significant quantities of Halon 1211 gas, 

determined to be outside the required 

specification, have been supplied to the 

aviation industry for use in fire extinguishing 

equipment. Halon 1211 (BCF) is used in 

handheld fire extinguishers, usually fitted or 

stowed in aircraft cabins. 

EASA published Safety Information 

Bulletin (SIB) 2009–39 on 23 October 2009 to 

make the aviation community aware of this 

safety concern. 

The results of the ongoing investigation 

now show that LyonTech Engineering Ltd, a 

UK-based company, has supplied a quantity 

of heavily contaminated Halon 1211 (BCF) to 

Fire Fighting Enterprises (FFE). This Halon 

1211 has subsequently been used to fill 

certain FFE portable fire extinguishers that 

are now likely to be installed in or carried 

on board aircraft. 

The contaminated nature of this gas, when 

used against a fire, may lead to release of 

toxic fumes, possibly causing injury to 

aircraft occupants. 

For the reason described above, this EASA 

AD requires the identification and removal 

from service of all affected fire extinguishers 

and replacement with serviceable units. 

EASA AD 2009–0262 adds the 

following: 

* * * On 25 November 2009, EASA 

Emergency AD 2009–0251E was published to 

address an earlier batch of extinguishers with 

contaminated Halon 1211. 

The results of the ongoing investigation 

have now established that LyonTech 

Engineering Ltd, a UK-based company, has 

supplied further consignments of Halon 1211 

(BCF) to Fire Fighting Enterprises (FFE) that 

do not meet the required specification. This 

Halon 1211 has subsequently been used to 

fill certain FFE portable cabin and toilet 

compartment fire extinguishers that are now 

likely to be installed in or carried on board 

aircraft. 

The contaminated nature of this gas, when 

used against a fire, may provide reduced fire 

suppression, endangering the safety of the 

aircraft and its occupants. In addition, 

extinguisher activation may lead to release of 

toxic fumes, possibly causing injury to 

aircraft occupants. 

* * * * * 

You may obtain further information by 

examining the MCAI in the AD docket. 

FAA’s Determination and Requirements 

of This 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 issuing this 

AD because we evaluated all pertinent 

information and determined the unsafe 

condition exists and is likely to exist or 


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222 Federal Register / Vol. 75, No. 2 / Tuesday, January 5, 2010 / Rules and Regulations 

develop on other products of the same 

type design. 

Differences Between the AD and the 

MCAI 

We have reviewed the MCAI 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. 

FAA’s Determination of the Effective 

Date 

An unsafe condition exists that 

requires the immediate adoption of this 

AD. The FAA has found that the risk to 

the flying public justifies waiving notice 

and comment prior to adoption of this 

rule because contaminated Halon 1211 

gas has been used to fill certain portable 

cabin and toilet compartment fire 

extinguishers that are now likely to be 

installed in or carried on board aircraft. 

The contaminated nature of this gas, 

when used against a fire, may provide 

reduced fire suppression, endangering 

the safety of the aircraft and its 

occupants. In addition, extinguisher 

activation may lead to release of toxic 

fumes, possibly causing injury to 

aircraft occupants. Therefore, we 

determined that notice and opportunity 

for public comment before issuing this 

AD are impracticable and that good 

cause exists for making this amendment 

effective in less than 30 days. 

Comments Invited 

This AD is a final rule that involves 

requirements affecting flight safety, and 

we did not precede it by notice and 

opportunity for public comment. We 

invite you to send any written relevant 

data, views, or arguments about this AD. 

Send your comments to an address 

listed under the ADDRESSES section. 

Include ‘‘Docket No. FAA–2009–1225; 

Directorate Identifier 2009–NM–257– 

AD’’ at the beginning of your comments. 

We specifically invite comments on the 

overall regulatory, economic, 

environmental, and energy aspects of 

this AD. We will consider all comments 

received by the closing date and may 

amend this 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 AD. 

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. 

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 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 AD and placed it in the AD docket. 

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 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: 

2010–01–03 Fire Fighting Enterprises 

Limited: Amendment 39–16159. Docket 

No. FAA–2009–1225; Directorate 

Identifier 2009–NM–257–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective January 20, 2010. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to portable Halon 1211 

(BCF) fire extinguishers manufactured by 

Fire Fighting Enterprises Limited. These fire 

extinguishers may be installed on (or carried 

or stowed on board) various transport 

airplanes, small airplanes, and rotorcraft, 

certificated in any category, identified in but 

not limited to the airplanes and rotorcraft of 

the manufacturers included in Table 1 of this 

AD, all type-certificated models. 

TABLE 1—AFFECTED AIRPLANES AND ROTORCRAFT

Manufacturer Product subtype 

328 Support Services GmbH (Type Certificate previously held by AvCraft Aerospace GmbH; Fairchild Dornier GmbH; 

Dornier Luftfahrt GmbH).

Transport Airplane. 

Aermacchi S.p.A ................................................................................................................................................................... Small Airplane. 

Agusta S.p.A ......................................................................................................................................................................... Rotorcraft. 

AgustaWestland .................................................................................................................................................................... Rotorcraft. 

Airbus (Type Certificate previously held by Airbus Industrie) .............................................................................................. Transport Airplane. 

Aircraft Industries a.s. (Type Certificate previously held by LETECKE ́ ZA ́ VODY a.s.; LET Aeronautical Works) .............. Small Airplane. 

Alenia Aeronautica ................................................................................................................................................................ Transport Airplane. 


srobinson on DSKHWCL6B1PROD with RULES
Federal Register / Vol. 75, No. 2 / Tuesday, January 5, 2010 / Rules and Regulations 223 

TABLE 1—AFFECTED AIRPLANES AND ROTORCRAFT—Continued 

Manufacturer Product subtype 

B–N Group Ltd (Type Certificate previously held by Pilatus Britten-Norman Limited; Britten-Norman (Bembridge) Limited).Small Airplane. 

BAE Systems (Operations) Limited (Type Certificate previously held by British Aerospace Regional Aircraft; British 

Aerospace (Commercial Aircraft) Limited; Jetstream Aircraft Limited; British Aerospace, PLC; Avro International 

Aerospace Division; British Aerospace).

Transport Airplane. 

The Boeing Company ........................................................................................................................................................... Transport Airplane. 

Empresa Brasileira de Aeronautica S.A. (EMBRAER) ......................................................................................................... Transport Airplane. 

Eurocopter Deutschland GMBH (ECD) (Type Certificate previously held by Messerschmitt-Bolkow-Blohm-Gmbh) ......... Rotorcraft. 

Eurocopter France ................................................................................................................................................................ Rotorcraft. 

Fokker Services B.V ............................................................................................................................................................. Transport Airplane. 

Hawker Beechcraft (Type Certificate previously held by Raytheon Aircraft Company; Beech Aircraft Corporation) .......... Small Airplane. 

Pilatus Aircraft Ltd ................................................................................................................................................................. Small Airplane. 

Saab AB, Saab Aerosystems (Type Certificate previously held by SAAB AIRCRAFT AB; SAAB-Fairchild) ..................... Transport Airplane. 

Short Brothers PLC (Type Certificate previously held by Short Brothers, Ltd.) ................................................................... Transport Airplane. 

Triton America LLC (Type Certificate previously held by AAI Acquisition, Inc; Adam Aircraft) ........................................... Small Airplane. 

Vulcanair S.p.A. (Type Certificate previously held by Partenavia Costruzioni Aeronautiche S.p.A) ................................... Small Airplane. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 26: Fire Protection. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) consists of 

two European Aviation Safety Agency 

(EASA) ADs: 2009–0251–E, dated November 

25, 2009, and 2009–0262, dated December 

15, 2009. EASA AD 2009–0251–E states: 

The Civil Aviation Authority of the United 

Kingdom (UK) has informed EASA that 

significant quantities of Halon 1211 gas, 

determined to be outside the required 

specification, have been supplied to the 

aviation industry for use in fire extinguishing 

equipment. Halon 1211 (BCF) is used in 

handheld fire extinguishers, usually fitted or 

stowed in aircraft cabins. 

EASA published Safety Information 

Bulletin (SIB) 2009–39 on 23 October 2009 to 

make the aviation community aware of this 

safety concern. 

The results of the ongoing investigation 

now show that LyonTech Engineering Ltd, a 

UK-based company, has supplied a quantity 

of heavily contaminated Halon 1211 (BCF) to 

Fire Fighting Enterprises (FFE). This Halon 

1211 has subsequently been used to fill 

certain FFE portable fire extinguishers that 

are now likely to be installed in or carried 

on board aircraft. 

The contaminated nature of this gas, when 

used against a fire, may lead to release of 

toxic fumes, possibly causing injury to 

aircraft occupants. 

For the reason described above, this EASA 

AD requires the identification and removal 

from service of all affected fire extinguishers 

and replacement with serviceable units. 

EASA AD 2009–0262 adds the following: 

* * * * * 

* * * On 25 November 2009, EASA 

Emergency AD 2009–0251E was published to 

address an earlier batch of extinguishers with 

contaminated Halon 1211. 

The results of the ongoing investigation 

have now established that LyonTech 

Engineering Ltd, a UK-based company, has 

supplied further consignments of Halon 1211 

(BCF) to Fire Fighting Enterprises (FFE) that 

do not meet the required specification. This 

Halon 1211 has subsequently been used to 

fill certain FFE portable cabin and toilet 

compartment fire extinguishers that are now 

likely to be installed in or carried on board 

aircraft. 

The contaminated nature of this gas, when 

used against a fire, may provide reduced fire 

suppression, endangering the safety of the 

aircraft and its occupants. In addition, 

extinguisher activation may lead to release of 

toxic fumes, possibly causing injury to 

aircraft occupants. 

* * * * * 

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) Do the following actions. 

(1) Within 90 days after the effective date 

of this AD, replace portable Halon 1211 

(BCF) fire extinguishers manufactured by 

Fire Fighting Enterprises Limited with 

serviceable fire extinguishers; except as 

provided by paragraph (g)(2) of this AD. 

(2) Fire extinguishers identified in 

paragraphs (g)(2)(i) and (g)(2)(ii) of this AD 

are not required to be replaced. 

(i) Fire extinguishers conclusively 

determined to have been most recently filled 

with Halon 1211 supplied by a company 

other than LyonTech Engineering Limited. 

(ii) Fire extinguishers that have been most 

recently filled by LyonTech Engineering 

Limited and that are conclusively determined 

by Fire Fighting Enterprises Limited to be 

filled with Halon 1211 that meets their 

design specification for Halon purity. 

(3) As of the effective date of this AD, do 

not install any portable fire extinguisher 

manufactured by Fire Fighting Enterprises 

Limited unless it has been conclusively 

determined that the last time it was filled, it 

was filled with Halon 1211 supplied by a 

company other than LyonTech Engineering 

Limited; or it has been conclusively 

determined by Fire Fighting Enterprises 

Limited that the last time it was filled, it was 

filled with Halon 1211 that meets their 

design specification for Halon purity. 

FAA AD Differences 

Note: This AD differs from the MCAI and/ 

or service information as follows: 

(1) EASA ADs 2009–0251–E and 2009– 

0262 specify to inspect for certain fire 

extinguishers manufactured by Fire Fighting 

Enterprises Limited and replace if necessary. 

This AD requires replacing all fire 

extinguishers manufactured by Fire Fighting 

Enterprises Limited except as provided in 

paragraph (g)(2) of this AD. 

(2) EASA AD 2009–0251–E specifies a time 

of 2 days to do the actions and EASA AD 

2009–0262 specifies a time of 30 days to do 

the actions. This AD requires that the actions 

be done within 90 days. We have determined 

that a 90-day compliance time will ensure an 

acceptable level of safety. 

Other FAA AD Provisions 

(h) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The manager of the office having 

certificate responsibility for the affected 

product has the authority to approve AMOCs 

for this AD, if requested using the procedures 

found in 14 CFR 39.19. The Manager, 

International Branch, ANM–116, Transport 

Airplane Directorate, FAA, will coordinate 

requests for approval of AMOCs with the 

manager of the appropriate office for the 

affected product. Send information to ATTN: 

Dan Rodina, Aerospace Engineer, 

International Branch, ANM–116, Transport 

Airplane Directorate, FAA, 1601 Lind 

Avenue, SW., Renton, Washington 98057– 

3356; telephone (425) 227–2125; fax (425) 

227–1149. 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 


srobinson on DSKHWCL6B1PROD with RULES
224 Federal Register / Vol. 75, No. 2 / Tuesday, January 5, 2010 / Rules and Regulations 

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 

(i) Refer to MCAI EASA Emergency 

Airworthiness Directive 2009–0251–E, dated 

November 25, 2009; and EASA 

Airworthiness Directive 2009–0262, dated 

December 15, 2009; for related information. 

Material Incorporated by Reference 

(j) None. 

Issued in Washington, DC, on December 

28, 2009. 

Kalene C. Yanamura, 

Acting Director, Aircraft Certification Service. 

[FR Doc. E9–31134 Filed 1–4–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–0785; Directorate 

Identifier 2009–NM–125–AD; Amendment 

39–16163; AD 2010–01–06] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. (Type Certificate Previously Held 

by de Havilland, Inc.) Model DHC–8– 

400 Series Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: We are superseding an 

existing airworthiness directive (AD) for 

the products listed above. This 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: 

There has been one case reported of failure 

of a shaft (tailstock) on an elevator Power 

Control Unit (PCU), Part Number (P/N) 

390600–1007. Continued actuation of the 

affected PCU caused damage to the 

surrounding structure. * * *

Each elevator surface has three PCUs, 

powered by separate independent hydraulic 

systems, and a single elevator PCU shaft 

failure may remain dormant. Such a dormant 

loss of redundancy, coupled with the 

potential for a failed shaft to produce 

collateral damage, including damage to 

hydraulic lines, could possibly affect the 

controllability of the aircraft. 

* * * * * 

We are issuing this AD to require 

actions to correct the unsafe condition 

on these products. 

DATES: This AD becomes effective 

February 9, 2010. 

On June 26, 2009 (74 FR 27686, June 

11, 2009), 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 

U.S. Department of Transportation, 

Docket Operations, M–30, West 

Building Ground Floor, Room W12–140, 

1200 New Jersey Avenue, SE., 

Washington, DC. 

FOR FURTHER INFORMATION CONTACT: 

Cesar Gomez, 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– 

7318; fax (516) 794–5531. 

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 September 4, 2009 (74 FR 

45787), and proposed to supersede AD 

2009–12–13, Amendment 39–15936 (74 

FR 27686, June 11, 2009). That NPRM 

proposed to correct an unsafe condition 

for the specified products. 

When we issued AD 2009–12–13, the 

eventual replacement of all elevator 

power control units identified in 

paragraph (f)(1) of that AD was not 

required. We have now determined that 

further rulemaking is necessary for this 

action, and this AD follows from that 

determination. We are mandating the 

optional terminating action in paragraph 

(f)(3) of AD 2009–12–13 in this AD. You 

may obtain further information by 

examining the MCAI in the AD docket. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

received no comments on the NPRM or 

on the determination of the cost to the 

public. 

Explanation of Change to Alternative 

Method of Compliance Paragraph 

We have updated paragraph (h)(1) of 

this AD to provide the appropriate 

contact information to use when 

submitting requests for approval of an 

alternative method of compliance 

(AMOC). 

Explanation of Changes Made to This 

AD 

We have revised this AD to identify 

the legal name of the manufacturer as 

published in the most recent type 

certificate data sheet for the affected 

airplane models. 

Conclusion 

We reviewed the available data and 

determined that air safety and the 

public interest require adopting the AD 

with the changes described previously. 

We determined that these changes will 

not increase the economic burden on 

any operator or increase the scope of the 

AD. 

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 our FAA 

policies. Any such differences are 

highlighted in a Note within the AD. 

Costs of Compliance 

We estimate that this AD will affect 

about 61 products of U.S. registry. 

The actions that are required by AD 

2009–12–13 and retained in this AD 

take about 3 work-hours per product, at 

an average labor rate of $80 per work 

hour. Based on these figures, the 

estimated cost of the currently required 

actions is $240 per product. 

We estimate that it will take about 13 

work-hours per product to comply with 

the new basic requirements of this AD. 

The average labor rate is $80 per workhour. Required parts will cost about $0 

per product. Where the service 

information lists required parts costs 

that are covered under warranty, we 

have assumed that there will be no 

charge for these costs. As we do not 

control warranty coverage for affected 

parties, some parties may incur costs 

higher than estimated here. Based on 

these figures, we estimate the cost of 

this AD to the U.S. operators to be 

$63,440, or $1,040 per product. 


srobinson on DSKHWCL6B1PROD with RULES