Federal Register / Vol. 72, No. 70 / Thursday, April 12, 2007 / Proposed Rules 18413 

maintained after the aircraft enters into 

service. 

On December 21, 2006, the FAA 

issued a notice of proposed rulemaking 

that proposes amending § 25.795(a) to 

require that a flightdeck bulkhead—and 

any other accessible barrier separating 

the flightcrew compartment from 

occupied areas—also be designed to 

resist intrusion or penetration. The 

methods of compliance described in the 

preamble of that notice and associated 

draft advisory material could be used to 

show compliance to these proposed 

special conditions. 

For the 787, the reinforced bulkhead 

may be comprised of components such 

as the walls of adjacent lavatories, 

galleys, or crew rest areas. Those 

components would be covered by these 

proposed special conditions. 

Applicability 

As discussed above, these proposed 

special conditions are applicable to the 

787. Should Boeing apply at a later date 

for a change to the type certificate to 

include another model incorporating the 

same novel or unusual design features, 

these proposed special conditions 

would apply to that model as well 

under the provisions of § 21.101. 

Conclusion 

This action would affect only certain 

novel or unusual design features of the 

787. It is not a rule of general 

applicability, and it would affect only 

the applicant that applied to the FAA 

for approval of these features on the 

airplane. 

List of Subjects in 14 CFR Part 25 

Aircraft, Aviation safety, Reporting 

and recordkeeping requirements. 

The authority citation for these 

Special Conditions is as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701, 

44702, 44704. 

The Proposed Special Conditions 

Accordingly, the Administrator of the 

Federal Aviation Administration (FAA) 

proposes the following special 

conditions as part of the type 

certification basis for the Boeing Model 

787–8 airplane. 

In addition to the requirements of 14 

CFR 25.795(a) governing protection of 

the flightdeck door, the following 

special conditions apply. 

The reinforced bulkhead, including 

components that comprise the 

bulkhead, separating the flightcrew 

compartment from occupied areas must 

be designed to meet the following 

standards: 

It must resist forcible intrusion by 

unauthorized persons and be capable of 

withstanding impacts of 300 Joules 

(221.3 foot-pounds) at critical locations 

on the bulkhead as well as a 1113 

Newton (250 pound) constant tensile 

load on accessible handholds. 

It must resist penetration by small 

arms fire and fragmentation devices to 

a level equivalent to level IIIa of the 

National Institute of Justice Standard 

(NIJ) 0101.04. 

Issued in Renton, Washington, on April 4, 

2007. 

Stephen P. Boyd, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. E7–6887 Filed 4–11–07; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2007–27611; Directorate 

Identifier 2007–CE–024–AD] 

RIN 2120–AA64 

Airworthiness Directives; Sierra Hotel 

Aero, Inc. Models Navion (L–17A), 

Navion A (L–17B), (L–17C), Navion B, 

Navion D, Navion E, Navion F, Navion 

G, and Navion H 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 all 

Sierra Hotel Aero, Inc. (formally Navion 

Aircraft LLC) Models Navion (L–17A), 

Navion A (L–17B), (L–17C), Navion B, 

Navion D, Navion E, Navion F, Navion 

G, and Navion H airplanes. This 

proposed AD would require a one-time 

inspection of the entire fuel system and 

repetitive inspections of certain fuel 

selector valves. This proposed AD 

results from reports of airplane 

accidents associated with leaking or 

improperly operating fuel selector 

valves. We are proposing this AD to 

detect and correct fuel system leaks or 

improperly operating fuel selector 

valves, which could result in the 

disruption of fuel flow to the engine. 

This failure could lead to engine power 

loss. 

DATES: We must receive comments on 

this proposed AD by July 11, 2007. 

ADDRESSES: Use one of the following 

addresses to comment on this proposed 

AD: 

• DOT Docket Web site: Go to 

http://dms.dot.gov and follow the 

instructions for sending your comments 

electronically. 

• Mail: Docket Management Facility; 

U.S. Department of Transportation, 400 

Seventh Street, SW., Nassif Building, 

Room PL–401, Washington, DC 20590–

0001. 

• Fax: (202) 493–2251. 

• Hand Delivery: Room PL–401 on 

the plaza level of the Nassif Building, 

400 Seventh Street, SW., Washington, 

DC, between 9 a.m. and 5 p.m., Monday 

through Friday, except Federal holidays. 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

For service information identified in 

this proposed AD, contact Sierra Hotel 

Aero, 1690 Aeronca Lane, South St. 

Paul, MN 55075; phone: (651) 306–

1456; fax: (612) 677–3171; Internet: 

http://www.navion.com/ 

servicebulletins.html; e-mail: 

servicebulletinsupport@navion.com. 

FOR FURTHER INFORMATION CONTACT: Tim 

Smyth, Aerospace Engineer, 2300 East 

Devon Avenue, Room 107, Des Plaines, 

Illinois 60018; telephone: (847) 294–

7132; fax: (847) 294–7834. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments 

regarding this proposed AD. Send your 

comments to an address listed under the 

ADDRESSES section. Include the docket 

number, ‘‘FAA–2007–27611; Directorate 

Identifier 2007–CE–024–AD’’ at the 

beginning of your comments. We 

specifically invite comments on the 

overall regulatory, economic, 

environmental, and energy aspects of 

the proposed AD. We will consider all 

comments received by the closing date 

and may amend the proposed AD in 

light of those comments. 

We will post all comments we 

receive, without change, to http:// 

dms.dot.gov, including any personal 

information you provide. We will also 

post a report summarizing each 

substantive verbal contact we receive 

concerning this proposed AD. 

Discussion 

We have received several recent 

reports of Navion series airplanes 

involved in accidents where loss of 

engine power was a contributing factor. 

In some of these accidents, the National 

Transportation Safety Board (NTSB) 

determined that the cause of engine 

power loss was defective fuel selector 

valves or gasolators that allowed air to 

be introduced into the fuel lines and 

disrupt the flow of fuel to the engine. 

This condition, if not corrected, could 

result in engine power loss. 


rmajette on PROD1PC67 with PROPOSALS
18414 Federal Register / Vol. 72, No. 70 / Thursday, April 12, 2007 / Proposed Rules 

Relevant Service Information 

We have reviewed the following 

service information: 

• Sierra Hotel Aero, Inc. Navion 

Service Bulletin No. 106, dated 

February 27, 2007; 

• Sierra Hotel Aero, Inc. Navion 

Service Bulletin No. 101A, dated August 

23, 2005; and 

• Navion Aircraft Corporation Navion 

Service letter # 87, dated February 20, 

1965. 

The service information describes 

procedures for: 

• Performing a detailed inspection of 

the entire fuel system; 

• Inspecting and testing the fuel 

selector valve; 

• Replacing the fuel selector valve; 

and 

• Replacing the fuel accumulator 

tank. 

FAA’s Determination and Requirements 

of the Proposed AD 

We are proposing this AD because we 

evaluated all information and 

determined the unsafe condition 

described previously is likely to exist or 

develop on other products of the same 

type design. This proposed AD would 

require a one-time inspection of the 

entire fuel system and repetitive 

inspections of certain fuel selector 

valves. 

Costs of Compliance 

We estimate that this proposed AD 

would affect 1,500 airplanes in the U.S. 

registry. 

We estimate the following costs to do 

the proposed inspection: 

Labor cost Parts cost Total cost per 

airplane 

Total cost on 

U.S. operators 

7 work-hours × $80 per hour = $560 .......................................................................................... N/A $560 $840,000 

We estimate the following costs to do 

any necessary replacements that would 

be required based on the results of the 

proposed inspection. We have no way of 

determining the number of airplanes 

that may need this repair/replacement: 

Labor cost Parts cost Total cost per 

airplane 

3 work-hours × $80 per hour = $240 ...................................................................................................................... $1,000 $1,240 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. Subtitle VII, 

Aviation Programs, describes in more 

detail the scope of the Agency’s 

authority. 

We are issuing this rulemaking under 

the authority described in subtitle VII, 

part A, subpart III, section 44701, 

‘‘General requirements.’’ Under that 

section, Congress charges the FAA with 

promoting safe flight of civil aircraft in 

air commerce by prescribing regulations 

for practices, methods, and procedures 

the Administrator finds necessary for 

safety in air commerce. This regulation 

is within the scope of that authority 

because it addresses an unsafe condition 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

We have determined that this 

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 that the 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. 

Examining the AD Docket 

You may examine the AD docket that 

contains the proposed AD, the 

regulatory evaluation, any comments 

received, and other information on the 

Internet at http://dms.dot.gov; or in 

person at the Docket Management 

Facility between 9 a.m. and 5 p.m., 

Monday through Friday, except Federal 

holidays. The Docket Office (telephone 

(800) 647–5227) is located at the street 

address stated 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, 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: 

Sierra Hotel Aero, Inc. (Formally Navion 

Aircraft LLC): Docket No. FAA–2007–

27611; Directorate Identifier 2007–CE–

024–AD. 

Comments Due Date 

(a) We must receive comments on this 

airworthiness directive (AD) action by July 

11, 2007. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Models Navion (L–

17A), Navion A (L–17B), (L–17C), Navion B, 

Navion D, Navion E, Navion F, Navion G, 

and Navion H airplanes, all serial numbers, 

that are certificated in any category. 

Unsafe Condition 

(d) This AD results from reported airplane 

accidents associated with leaking or 

improperly operating fuel system selector 

valves. We are issuing this AD to detect and 

correct fuel system leaks or improperly 

operating fuel selector valves, which could 

result in the disruption of fuel flow to the 

engine. This failure could lead to engine 

power loss. 


rmajette on PROD1PC67 with PROPOSALS
Federal Register / Vol. 72, No. 70 / Thursday, April 12, 2007 / Proposed Rules 18415 

Compliance 

(e) To address this problem, you must do 

the following, unless already done: 

Actions Compliance Procedures 

(1) Inspect the fuel system, including inspecting 

and doing functional tests of the fuel selector 

valve. 

Initially no later than 100 hours time-in-service 

(TIS) or 12 months, whichever occurs first, 

after the effective date of this AD. Repetitively thereafter inspect the fuel selector 

valve at intervals not to exceed 12 months 

until the replacement required by paragraph 

(e)(2) of this AD is done. 

Follow Sierra Hotel Aero, Inc. Navion Service 

Bulletin No. 106, dated February 27, 2007. 

(2) Perform any corrective actions required as 

specified in Sierra Hotel Aero, Inc. Navion 

Service Bulletin No. 106, dated February 27, 

2007, including replacing the fuel selector 

valve with one of the following part numbers 

(P/N): 

(i) Navion P/N 147–30013–201 for airplanes equipped with ON/OFF fuel 

valves for the main tank. 

(ii) Navion P/N 147–30013–202 for airplanes equipped with main and auxiliary 

selectable tanks. 

(iii) Navion P/N 147–30013–203 for airplanes equipped with left tip, right tip and 

main tanks. 

Before further flight after any inspection required by this AD where corrective actions 

are necessary. 

Use the following service information: 

(A) Sierra Hotel Aero, Inc. Navion Service 

Bulletin No. 106, dated February 27, 

2007. 

(B) Sierra Hotel Aero, Inc. Navion Service 

Bulletin No. 101A, dated August 23, 

2005. 

(C) Navion Aircraft Corporation Navion 

Service letter # 87, dated February 20, 

1965. 

(3) As terminating action for the required repetitive inspections in paragraph (e)(1) of this 

AD, you may replace the fuel selector valve 

with the applicable P/N as specified in paragraphs (e)(2)(i), (e)(2)(ii), and (e)(2)(iii) of this 

AD. 

At any time after the initial inspection required 

in paragraph (e)(1) of this AD; however, if 

replacement of the fuel selector valve is required as a corrective action as specified in 

Sierra Hotel Aero, Inc. Navion Service Bulletin No. 106, dated February 27, 2007, 

then you must replace before further flight. 

Follow the procedures in Sierra Hotel Aero, 

Inc. Navion Service Bulletin No. 101A, 

dated August 23, 2005. 

Alternative Methods of Compliance 

(AMOCs) 

(f) The Manager, Chicago Aircraft 

Certification Office, FAA, ATTN: Tim Smyth, 

Aerospace Engineer, 2300 East Devon 

Avenue, Room 107, Des Plaines, Illinois 

60018; telephone: (847) 294–7132; fax: (847) 

294–7834, has the authority to approve 

AMOCs for this AD, if requested using the 

procedures found in 14 CFR 39.19. 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. 

Related Information 

(g) To get copies of the service information 

referenced in this AD, contact Sierra Hotel 

Aero, 1690 Aeronca Lane, South St. Paul, MN 

55075; phone: (651) 306–1456; fax: (612) 

677–3171; Internet: http://www.navion.com/ 

servicebulletins.html; e-mail: 

servicebulletinsupport@navion.com. To view 

the AD docket, go to the Docket Management 

Facility; U.S. Department of Transportation, 

400 Seventh Street, SW., Nassif Building, 

Room PL–401, Washington, DC, or on the 

Internet at http://dms.dot.gov. The docket 

number is Docket No. FAA–2007–27611; 

Directorate Identifier 2007–CE–024–AD. 

Issued in Kansas City, Missouri, on April 

6, 2007. 

Kim Smith, 

Manager, Small Airplane Directorate, Aircraft 

Certification Service. 

[FR Doc. E7–6928 Filed 4–11–07; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2007–27849; Directorate 

Identifier 2006–NM–249–AD] 

RIN 2120–AA64 

Airworthiness Directives; Dassault 

Model Falcon 2000EX and Falcon 

900EX 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) 

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 some stringer 

reinforcements (F900DX) and some 

rivets (F900DX/F2000EX) missing from 

the skin panels on each side of the 

fuselage between frames 9 and 10 on 

certain Falcon 900DX and Falcon 

2000EX EASy aircraft; this situation 

affects the structural integrity of the 

fuselage. 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 May 14, 2007. 

ADDRESSES: You may send comments by 

any of the following methods: 

• DOT Docket Web Site: Go to 

http://dms.dot.gov and follow the 

instructions for sending your comments 

electronically. 

• Fax: (202) 493–2251. 

• Mail: Docket Management Facility, 

U.S. Department of Transportation, 400 

Seventh Street, SW., Nassif Building, 

Room PL–401, Washington, DC 20590–

0001. 

• Hand Delivery: Room PL–401 on 

the plaza level of the Nassif Building, 

400 Seventh Street, SW., Washington, 

DC, between 9 a.m. and 5 p.m., Monday 

through Friday, except Federal holidays. 


rmajette on PROD1PC67 with PROPOSALS