Federal Register / Vol. 74, No. 111 / Thursday, June 11, 2009 / Rules and Regulations 27691 

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.: 2009–0107, 

dated May 8, 2009; GROB Aircraft AG 

Service Bulletin No. MSB1121–108, dated 

March 18, 2009; and GROB Aircraft AG 

Service Bulletin No. MSB1121–108/1, dated 

April 27, 2009, for related information. 

Material Incorporated by Reference 

(i) You must use GROB Aircraft AG Service 

Bulletin No. MSB1121–108, dated March 18, 

2009; and GROB Aircraft AG Service Bulletin 

No. MSB1121–108/1, dated April 27, 2009, to 

do the actions required by this AD, unless the 

AD specifies otherwise. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

this service information under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(2) For service information identified in 

this AD, contact GROB Aircraft AG/Customer 

Service, 86874 Tussenhausen-Mattsies, 

Germany; telephone: +49 (0) 8268–998–105; 

fax: + 49 (0) 8268–998–200; e-mail 

productsupport@grob-aircraft.com; Internet: 

http://www.grob-aircraft.eu/service-andsupport/g-120/documentation/servicebulletins.html. 

(3) You may review copies of the service 

information incorporated by reference for 

this AD at the FAA, Central Region, Office of 

the Regional Counsel, 901 Locust, Kansas 

City, Missouri 64106. For information on the 

availability of this material at the Central 

Region, call (816) 329–3768. 

(4) You may also review copies of the 

service information incorporated by reference 

for this AD at the National Archives and 

Records Administration (NARA). For 

information on the availability of this 

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

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

code_of_federal_regulations/ibr_

locations.html. 

Issued in Kansas City, Missouri on June 4, 

2009. 

Kim Smith, 

Manager, Small Airplane Directorate, Aircraft 

Certification Service. 

[FR Doc. E9–13576 Filed 6–10–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2008–1364; Directorate 

Identifier 2008–NM–103–AD; Amendment 

39–15928; AD 2009–12–05] 

RIN 2120–AA64 

Airworthiness Directives; Boeing 

Model 737–300, –400, and –500 Series 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

Boeing Model 737–300, –400, and –500 

series airplanes. This AD requires 

modifying the control power wiring of 

the normal supply fan and the low flow 

sensor for the equipment cooling system 

of the electronic flight instrument 

system (EFIS). This AD results from a 

report of loss of both the normal EFIS 

cooling supply and the indication of 

EFIS cooling loss due to a single failure 

of the battery bus, causing eventual 

power-down of the EFIS displays; the 

standby attitude indication is also 

powered by this battery bus. We are 

issuing this AD to prevent loss of all 

attitude indications from both the 

standby indicator and EFIS displays, 

which could decrease the ability of the 

flightcrew to maintain the safe flight 

and landing of the airplane. 

DATES: This AD is effective July 16, 

2009. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in the AD 

as of July 16, 2009. 

ADDRESSES: For service information 

identified in this AD, contact Boeing 

Commercial Airplanes, Attention: Data 

& Services Management, P.O. Box 3707, 

MC 2H–65, Seattle, Washington 98124– 

2207; telephone 206–544–5000, 

extension 1, fax 206–766–5680; e-mail 

me.boecom@boeing.com; Internet 

https://www.myboeingfleet.com. 

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 AD, the regulatory 

evaluation, any comments received, and 

other information. The address for the 

Docket Office (telephone 800–647–5527) 

is the Document Management Facility, 

U.S. Department of Transportation, 

Docket Operations, M–30, West 

Building Ground Floor, Room W12–140, 

1200 New Jersey Avenue, SE., 

Washington, DC 20590. 

FOR FURTHER INFORMATION CONTACT: Suk 

Jang, Aerospace Engineer, Systems and 

Equipment Branch, ANM–130S, FAA, 

Seattle Aircraft Certification Office, 

1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone 

(425) 917–6511; fax (425) 917–6590. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an airworthiness 

directive (AD) that would apply to 

certain Boeing Model 737–300, –400, 

and –500 series airplanes. That NPRM 

was published in the Federal Register 

on January 12, 2009 (74 FR 1153). That 

NPRM proposed to require modifying 

the control power wiring of the normal 

supply fan and the low flow sensor for 

the equipment cooling system of the 

electronic flight instrument system 

(EFIS). 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

considered the comments received. 

Supportive Comments 

Boeing and Continental Airlines 

support the actions in the NPRM. 

Request To Add an Alternate Method of 

Compliance 

Lufthansa German Airlines asks that 

we add a method acceptable for 

compliance with the corresponding 

requirements of the NPRM. Lufthansa 

notes that, as specified in paragraphs (f), 

(g)(1), and (g)(2) of the NPRM, actions 

done in accordance with Boeing Alert 

Service Bulletin 737–21A1156, Revision 

1, dated October 23, 2007; or Boeing 

Alert Service Bulletin 737–21A1156, 

dated June 20, 2006; are acceptable for 

compliance. Lufthansa adds that these 

actions prevent loss of all attitude 

indications from both the standby 

indicator and EFIS displays in case of 

battery bus failure. (The following is a 

clarification of the commenter’s 

description of acceptable sources of 

service information specified in this AD: 

Boeing Alert Service Bulletin 737– 

21A1156, Revision 2, dated December 

11, 2008, is the source of service 

information referred to in the NPRM for 

accomplishing the specified actions. 

Actions done previously in accordance 

with Boeing Alert Service Bulletin 737– 

21A1156, Revision 1, dated October 23, 

2007; or Boeing Alert Service Bulletin 


cprice-sewell on PRODPC61 with RULES
27692 Federal Register / Vol. 74, No. 111 / Thursday, June 11, 2009 / Rules and Regulations 

737–21A1156, dated June 20, 2006 (for 

Groups 1 and 2 airplanes identified in 

Boeing Alert Service Bulletin 737– 

21A1156, Revision 1), are acceptable for 

compliance with the corresponding 

requirements of this AD.) 

Lufthansa asks that we consider 

another method to address this unsafe 

condition, which is to append an 

abnormal procedure task to the flight 

crew operations manual in case of 

battery bus failure to specify setting the 

equipment cooling switch to alternate if 

the battery bus fails. This would allow 

the alternate supply fan to still cool the 

EFIS displays and prevent them from 

failing. 

We disagree with the commenter’s 

request to add this additional method of 

compliance to the AD requirements. The 

identified unsafe condition is loss of all 

attitude indications from both the 

standby indicator and EFIS displays, 

which could decrease the ability of the 

flightcrew to maintain the safe flight 

and landing of the airplane. Although 

we recognize the commenter’s 

suggestion provides some safety 

mitigation for the unsafe condition, the 

inherently unsafe design of the EFIS 

cooling system must be corrected to 

ensure that flightcrews are equipped 

with attitude indications. Therefore, 

after the modification of the control 

power wiring of the EFIS cooling system 

is done, revising the flightcrew 

operations manual is not necessary and 

is not acceptable as an alternate method 

of compliance to this AD. We have 

made no change to the AD in this 

regard. 

Conclusion 

We reviewed the relevant data, 

considered the comments received, and 

determined that air safety and the 

public interest require adopting the AD 

as proposed. 

Costs of Compliance 

We estimate that this AD will affect 

263 airplanes of U.S. registry. The 

following table provides the estimated 

costs for U.S. operators to comply with 

this AD. 

ESTIMATED COSTS

Action/airplane group Work 

hours 

Average 

labor rate 

per hour 

Parts Cost per 

product 

Number of 

U.S.-registered 

airplanes 

Fleet cost 

Groups 1 & 2 modification ....................................... 3 $80 $0 $240 153 $36,720 

Group 4 modification ................................................ 2 $80 $0 $160 113 $18,080 

Currently, there are no Group 3 

airplanes on the U.S. Register. However, 

if an affected airplane is imported and 

placed on the U.S. Register in the future, 

the required actions would take about 5 

work hours, at an average labor rate of 

$80 per work hour. Based on these 

figures, we estimate the cost of this AD 

for Group 3 airplanes to be $400 per 

airplane. 

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 

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 that this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Is not a ‘‘significant rule’’ under 

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979), and 

(3) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

You can find our regulatory 

evaluation and the estimated costs of 

compliance in the AD Docket. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

Adoption of the Amendment 

■ Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 14 CFR part 39 as 

follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

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

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new AD: 

2009–12–05 Boeing: Amendment 39–15928. 

Docket No. FAA–2008–1364; Directorate 

Identifier 2008–NM–103–AD. 

Effective Date 

(a) This airworthiness directive (AD) is 

effective July 16, 2009. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Boeing Model 737– 

300, –400, and –500 series airplanes, 

certificated in any category; as identified in 

Boeing Alert Service Bulletin 737–21A1156, 

Revision 2, dated December 11, 2008. 

Unsafe Condition 

(d) This AD results from a report of loss of 

both the normal electronic flight instrument 

system (EFIS) cooling supply and the 

indication of EFIS cooling loss due to a single 

failure of the battery bus, causing eventual 

power-down of the EFIS displays; the 

standby attitude indication is also powered 

by this battery bus. We are issuing this AD 

to prevent loss of all attitude indications 

from both the standby indicator and EFIS 

displays, which could decrease the ability of 

the flightcrew to maintain the safe flight and 

landing of the airplane. 

Compliance 

(e) Comply with this AD within the 

compliance times specified, unless already 

done. 

Modification 

(f) Within 24 months after the effective 

date of this AD: Modify the control power 


cprice-sewell on PRODPC61 with RULES
Federal Register / Vol. 74, No. 111 / Thursday, June 11, 2009 / Rules and Regulations 27693 

wiring of the normal supply fan and the low 

flow sensor for the equipment cooling system 

of the EFIS, by doing all the applicable 

actions specified in the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

737–21A1156, Revision 2, dated December 

11, 2008. 

Credit for Actions Done Using Previous 

Service Information 

(g)(1) Actions done before the effective date 

of this AD in accordance with Boeing Alert 

Service Bulletin 737–21A1156, Revision 1, 

dated October 23, 2007, are acceptable for 

compliance with the corresponding 

requirements of this AD. 

(2) For Groups 1 and 2 airplanes identified 

in Boeing Alert Service Bulletin 737– 

21A1156, Revision 1, dated October 23, 2007: 

Actions done before the effective date of this 

AD in accordance with Boeing Alert Service 

Bulletin 737–21A1156, dated June 20, 2006, 

are acceptable for compliance with the 

corresponding requirements of this AD. 

Alternative Methods of Compliance 

(AMOCs) 

(h)(1) The Manager, Seattle Aircraft 

Certification Office (ACO), FAA, ATTN: Suk 

Jang, Aerospace Engineer, Systems and 

Equipment Branch, ANM–130S, FAA, Seattle 

ACO, 1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone (425) 

917–6511; fax (425) 917–6590; has the 

authority to approve AMOCs for this AD, if 

requested using the procedures found in 14 

CFR 39.19. 

(2) To request a different method of 

compliance or a different compliance time 

for this AD, follow the procedures in 14 CFR 

39.19. 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. 

Material Incorporated by Reference 

(i) You must use Boeing Alert Service 

Bulletin 737–21A1156, Revision 2, dated 

December 11, 2008; to do the actions 

required by this AD, unless the AD specifies 

otherwise. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

this service information under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(2) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Data & Services 

Management, P.O. Box 3707, MC 2H–65, 

Seattle, Washington 98124–2207; telephone 

206–544–5000, extension 1, fax 206–766– 

5680; e-mail me.boecom@boeing.com; 

Internet https://www.myboeingfleet.com. 

(3) You may review copies of the 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. 

(4) You may also review copies of the 

service information that is incorporated by 

reference at the National Archives and 

Records Administration (NARA). For 

information on the availability of this 

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

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

code_of_federal_regulations/ 

ibr_locations.html. 

Issued in Renton, Washington, on June 1, 

2009. 

Stephen P. Boyd, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. E9–13304 Filed 6–10–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2008–0612; Directorate 

Identifier 2008–NM–059–AD; Amendment 

39–15931; AD 2009–12–08] 

RIN 2120–AA64 

Airworthiness Directives; Boeing 

Model 747 Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for all 

Boeing Model 747 airplanes. This AD 

requires inspecting for cracks in the leftand right-side Stringer 11 longeron 

adjacent to the horizontal stabilizer 

pivot bulkhead, and related 

investigative and corrective actions if 

necessary. This AD results from a report 

of a crack found in the right-side 

Stringer 11 longeron horizontal flange, 

adjacent to the horizontal stabilizer 

pivot bulkhead, during a routine 

maintenance inspection. We are issuing 

this AD to detect and correct fatigue 

cracking of the longeron, which can 

propagate and cause damage to the 

adjacent horizontal stabilizer pivot 

bulkhead. This damage could result in 

loss of structural integrity and 

consequent inability of the bulkhead to 

carry flight loads, which could 

adversely affect controllability of the 

airplane. 

DATES: This AD becomes effective July 

16, 2009. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in the AD 

as of July 16, 2009. 

ADDRESSES: For service information 

identified in this AD, contact Boeing 

Commercial Airplanes, Attention: Data 

& Services Management, P.O. Box 3707, 

MC 2H–65, Seattle, Washington 98124– 

2207; telephone 206–544–5000, 

extension 1; fax 206–766–5680; e-mail 

me.boecom@boeing.com; Internet 

https://www.myboeingfleet.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 Management Facility 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 address for the 

Docket Office (telephone 800–647–5527) 

is the Document Management Facility, 

U.S. Department of Transportation, 

Docket Operations, M–30, West 

Building Ground Floor, Room W12–140, 

1200 New Jersey Avenue, SE., 

Washington, DC 20590. 

FOR FURTHER INFORMATION CONTACT: Ivan 

Li, Aerospace Engineer, Airframe 

Branch, ANM–120S, FAA, Seattle 

Aircraft Certification Office, 1601 Lind 

Avenue, SW., Renton, Washington 

98057–3356; telephone (425) 917–6437; 

fax (425) 917–6590. 

SUPPLEMENTARY INFORMATION: 

Discussion 

The FAA issued a supplemental 

notice of proposed rulemaking (NPRM) 

to amend 14 CFR part 39 to include an 

AD that would apply to all Boeing 

Model 747 airplanes. That supplemental 

NPRM was published in the Federal 

Register on February 20, 2009 (74 FR 

7834). That supplemental NPRM 

proposed to require inspecting for 

cracks in the left- and right-side Stringer 

11 longeron adjacent to the horizontal 

stabilizer pivot bulkhead, and doing 

related investigative and corrective 

actions if necessary. 

Comments 

We provided the public the 

opportunity to participate in the 

development of this AD. We have 

considered the comment received. The 

commenter, Boeing, concurs with the 

supplemental NPRM. 

Change to Supplemental NPRM 

We have added new paragraph (j) to 

this final rule and re-identified 

subsequent paragraphs to give credit for 

inspections accomplished using the 

original issue of Boeing Service Bulletin 

747–53A2703, dated February 14, 2008. 


cprice-sewell on PRODPC61 with RULES