Federal Register / Vol. 74, No. 181 / Monday, September 21, 2009 / Proposed Rules 48019 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–0868; Directorate 

Identifier 2009–CE–047–AD] 

RIN 2120–AA64 

Airworthiness Directives; ZLT Zeppelin 

Luftschifftechnik GmbH & Co KG 

Model LZ N07–100 Airships 

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: The manufacturer has 

advised of receiving a report that during 

start up on ground a RH propeller gear 

box (PGB) on the airship has failed 

resulting in free rotation of the 

propeller. Investigation performed by 

the manufacturer revealed that the bevel 

gear in the propeller gearbox had 

cracked near the hub area. During an 

extensive metallurgical investigation of 

the cracked bevel gear some different 

manufacturing deviations outside of the 

specifications were detected. Deviations 

in the heat treatment, wall thickness of 

the bevel gear near the hub area, and 

score marks caused during the 

production process have been 

established as causal factors for this 

failure. 

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 November 5, 2009. 

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: Karl 

Schletzbaum, Aerospace Engineer, FAA, 

Small Airplane Directorate, 901 Locust, 

Room 301, Kansas City, Missouri 64106; 

telephone: (816) 329–4146; fax: (816) 

329–4090; e-mail: 

karl.schletzbaum@faa.gov. 

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–2009–0868; Directorate Identifier 

2009–CE–047–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. 2009– 

0182, dated August 20, 2009 (referred to 

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

unsafe condition for the specified 

products. The MCAI states: 

The manufacturer has advised of receiving 

a report that during start up on ground a RH 

propeller gear box (PGB) on the airship has 

failed resulting in free rotation of the 

propeller. Investigation performed by the 

manufacturer revealed that the bevel gear in 

the propeller gearbox had cracked near the 

hub area. 

During an extensive metallurgical 

investigation of the cracked bevel gear some 

different manufacturing deviations outside of 

the specifications were detected. Deviations 

in the heat treatment, wall thickness of the 

bevel gear near the hub area, and score marks 

caused during the production process have 

been established as causal factors for this 

failure. 

For the reasons described above, this new 

AD mandates the replacement of the affected 

bevel gears, and limits, as a temporary 

measure, their service-life to 1 000 Flight 

Hours (for non-refurbished PGBs) and to 1 

600 Flight Hours (for refurbished PGBs). 

You may obtain further information by 

examining the MCAI in the AD docket. 

Relevant Service Information 

ZLT Zeppelin Luftschifftechnik 

GmbH & Co KG has issued Service 

Bulletin S07 830 0001, Issue B–00, 

dated June 29, 2009. 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 

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 

We estimate that this proposed AD 

will affect 1 product of U.S. registry. We 

also estimate that it would take about 18 

work-hours per product to comply with 

the basic requirements of this proposed 


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48020 Federal Register / Vol. 74, No. 181 / Monday, September 21, 2009 / Proposed Rules 

AD. The average labor rate is $80 per 

work-hour. Required parts would cost 

about $66,488 per gear box replacement. 

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 the proposed AD on U.S. 

operators to be $67,928 per gear box 

replacement. 

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: 

ZLT Zeppelin Luftschifftechnik GmbH & Co 

KG: Docket No. FAA–2009–0868; 

Directorate Identifier 2009–CE–047–AD. 

Comments Due Date 

(a) We must receive comments by 

November 5, 2009. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Model LZ N07–100 

airships, serial numbers 002, 003, and 004, 

that are certificated in any category and are 

equipped with the following propeller gear 

boxes: 

Part No. Serial No. Designation 

07 722 0001–200 ............................................................. 103, 106, 109, 112, 401, 401 .......................................... AFT propeller gear box. 

07 722 0002–200 ............................................................. 101, 104, 107, 110, 201 .................................................. LH propeller gear box. 

07 722 0003–200 ............................................................. 102, 105, 108, 111, 301, 302 .......................................... RH propeller gear box. 

Subject 

(d) Air Transport Association of America 

(ATA) Code 65: Tail Rotor Drive. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

The manufacturer has advised of receiving 

a report that during start up on ground a RH 

propeller gear box (PGB) on the airship has 

failed resulting in free rotation of the 

propeller. Investigation performed by the 

manufacturer revealed that the bevel gear in 

the propeller gearbox had cracked near the 

hub area. 

During an extensive metallurgical 

investigation of the cracked bevel gear some 

different manufacturing deviations outside of 

the specifications were detected. Deviations 

in the heat treatment, wall thickness of the 

bevel gear near the hub area, and score marks 

caused during the production process have 

been established as causal factors for this 

failure. 

For the reasons described above, this new 

AD mandates the replacement of the affected 

bevel gears, and limits, as a temporary 

measure, their service-life to 1 000 Flight 

Hours (for non-refurbished PGBs) and to 1 

600 Flight Hours (for refurbished PGBs). 

Actions and Compliance 

(f) Unless already done, do the following 

actions in accordance with ZLT Zeppelin 

Luftschifftechnik GmbH & Co KG Service 

Bulletin S07 830 0001, Issue B–00, dated 

June 29, 2009: 

(1) As of the effective date of this AD, 

before the accumulation of the applicable 

total hours time-in-service (TIS) as defined in 

the appendix of ZLT Zeppelin 

Luftschifftechnik GmbH & Co KG Service 

Bulletin S07 830 0001, Issue B–00, dated 

June 29, 2009, replace the bevel gears of the 

propeller gearbox. 

(2) As of the effective date of this AD, for 

airships with a propeller gear box identified 

in paragraph (c)(1) of this AD that have 

exceeded the applicable total hours TIS as 

defined in the appendix of ZLT Zeppelin 

Luftschifftechnik GmbH & Co KG Service 

Bulletin S07 830 0001, Issue B–00, dated 

June 29, 2009, replace the bevel gears of the 

propeller gearbox within the next 30 days 

after the effective date of this AD. 

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

airships with a propeller gear box S/N 102, 

107, 108, 109, or 112, contact the 

manufacturer at ZLT Zeppelin 

Luftschifftechnik GmbH & Co KG, 88046 

Friedrichsfafen, Allmannsweilerstrasse 132, 

Germany; telephone: + 49 (0) 7541–5900– 

546; fax: +40 (0) 7541–5900–516, to obtain a 

repair scheme within the next 30 days after 

the effective date of this AD. Incorporate the 

repair scheme before further flight after 

receipt. 

(4) After doing the replacements required 

in paragraphs (f)(1), (f)(2), and (f)(3) of this 

AD, replace the bevel gears of the propeller 

gearbox thereafter at intervals not to exceed 

1,600 hours TIS on the propeller gearbox. 

Note 1: The time between overhaul for gear 

boxes specified in the airship maintenance 

manual remains unchanged. 

Note 2: Airships with a propeller gear box 

S/N 102, 107, 108, 109, or 112 have exceeded 

their life limit and are not eligible for bevel 

gear replacement. See paragraph (f)(3) of this 

AD. 


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Federal Register / Vol. 74, No. 181 / Monday, September 21, 2009 / Proposed Rules 48021 

FAA AD Differences 

Note 3: 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: Karl Schletzbaum, Aerospace 

Engineer, FAA, Small Airplane Directorate, 

901 Locust, Room 301, Kansas City, Missouri 

64106; telephone: (816) 329–4146; fax: (816) 

329–4090; e-mail: karl.schletzbaum@faa.gov. 

Before using any approved AMOC on any 

airship 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 European Aviation 

Safety Agency (EASA) AD No. 2009–0182, 

dated August 20, 2009; and ZLT Zeppelin 

Luftschifftechnik GmbH & Co KG Service 

Bulletin S07 830 0001, Issue B–00, dated 

June 29, 2009, for related information. 

Issued in Kansas City, Missouri, on 

September 14, 2009. 

Kim Smith, 

Manager, Small Airplane Directorate, Aircraft 

Certification Service. 

[FR Doc. E9–22641 Filed 9–18–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–0864; Directorate 

Identifier 2008–NM–202–AD] 

RIN 2120–AA64 

Airworthiness Directives; Dassault 

Model Falcon 10 Airplanes; Model Fan 

Jet Falcon Airplanes; Model MystereFalcon 200 Airplanes; Model MystereFalcon 20–C5, 20–D5, 20–E5, and 20– 

F5 Airplanes; Model Falcon 2000 and 

Falcon 2000EX Airplanes; and Model 

Mystere-Falcon 50 and 900, and Falcon 

900EX 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: 

During maintenance on one aircraft, it was 

discovered that the overpressure capsules 

were broken on both pressurization valves. 

Failure of the pressurization control 

regulating valve (overpressure capsule) will 

affect the aircraft’s overpressure protection. 

* * * 

* * * * * 

The unsafe condition is 

overpressurization, which can result in 

injury to the occupants and possible 

structural failure leading to loss of 

control of the airplane. 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 October 21, 2009. 

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 Dassault 

Falcon Jet, P.O. Box 2000, South 

Hackensack, New Jersey 07606; 

telephone 201–440–6700; Internet 

http://www.dassaultfalcon.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 or 425–227–1152. 

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: Tom 

Rodriguez, Aerospace Engineer, 

International Branch, ANM–116, 

Transport Airplane Directorate, FAA, 

1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone 

(425) 227–1137; fax (425) 227–1149. 

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–2009–0864; Directorate Identifier 

2008–NM–202–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 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 EASA 

Airworthiness Directive 2008–0072, 


srobinson on DSKHWCL6B1PROD with PROPOSALS