Federal Register / Vol. 70, No. 182 / Wednesday, September 21, 2005 / Rules and Regulations 55239 

which could propagate and result in reduced 

structural integrity of the fuselage. 

Compliance 

(e) You are responsible for having the 

actions required by this AD performed within 

the compliance times specified, unless the 

actions have already been done. 

Repetitive Inspections 

(f) At the applicable times in paragraph 

(f)(1) or (f)(2) of this AD: Do high-frequency 

eddy current inspection for cracks of the 

inboard lower flange and radius of the lefthand and right-hand outboard floor beams at 

FR48. Do all inspections in accordance with 

the Accomplishment Instructions of the 

applicable service bulletin in Table 1 of this 

AD. Doing the action in paragraph (h) of this 

AD terminates the repetitive inspection 

requirements of this paragraph. 

(1) For Airbus Model A330–301, –321, 

–322, –341, and –342 airplanes: Do the first 

inspection before the accumulation of 8,400 

flight cycles since the date of issuance of the 

original standard airworthiness certificate or 

the date of issuance of the original export 

certificate of airworthiness, or within 6 

months after the effective date of this AD, 

whichever occurs later; and repeat the 

inspection thereafter at intervals not to 

exceed 3,860 total flight cycles or 15,050 

flight hours, whichever occurs earlier. 

(2) For Airbus Model A340–211, –212, 

–213, –311, –312, and –313 airplanes: Do the 

first inspection before the accumulation of 

the earlier of 9,200 flight cycles or 70,000 

flight hours since the date of issuance of the 

original standard airworthiness certificate or 

the date of issuance of the original export 

certificate of airworthiness, or within 6 

months after the effective date of this AD, 

whichever occurs later; and repeat the 

inspection thereafter at intervals not to 

exceed 3,070 flight cycles. 

TABLE 1.—SERVICE BULLETINS

For airbus model— Airbus service bulletin—

A330–301, –321, –322, –341, and –342 airplanes ........................................................... A330–53–3014, Revision 05, dated June 20, 2003. 

A340–211, –212, –213, –311, –312, and –313 airplanes ................................................. A340–53–4022, Revision 05, dated June 16, 2003. 

Related Investigative and Corrective Actions 

(g) If any crack is found during any 

inspection required by paragraph (f) of this 

AD: Do the applicable actions in paragraph 

(g)(1) and (g)(2) of this AD. 

(1) For cracks at the radius: Before further 

flight, repair the crack according to a method 

approved by either the Manager, 

International Branch, ANM–116, Transport 

Airplane Directorate, FAA; or the Direction 

Gea ́nea ́rale de l’Aviation Civile (DGAC) (or 

its delegated agent). 

(2) For cracks at the flange: Before further 

flight, measure the total length of the crack 

and do the applicable action in paragraph 

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

(i) If the crack is less than 12 mm (0.472 

inch) in length: Before further flight, stopdrill the crack and, within 500 flight cycles 

after stop-drilling the crack, do the action in 

paragraph (h) of this AD. 

(ii) If the crack is greater than or equal to 

12 mm (0.472 inch) in length: Before further 

flight, repair the crack according to a method 

approved by either the Manager, 

International Branch, ANM–116; or the 

Direction Gea ́nea ́rale de l’Aviation Civile 

(DGAC) (or its delegated agent). 

Optional Terminating Action 

(h) Installing a stainless steel doubler in 

accordance with Airbus Service Bulletin 

A330–53–3013, Revision 03, December 23, 

1999; or Airbus Service Bulletin A340–53–

4021, Revision 05, dated January 27, 2003; as 

applicable; terminates the repetitive 

inspection requirements of paragraph (f) of 

this AD. If any crack is found during this 

installation while doing the rotating probe 

inspection of the fastener holes: Before 

further flight, repair the crack according to a 

method approved by either the Manager, 

International Branch, ANM–116; or the 

DGAC (or its delegated agent). 

No Reporting Required 

(i) Although the Accomplishment 

Instructions of the service bulletins identified 

in Table 1 of this AD describe procedures for 

reporting certain information to the 

manufacturer, this AD would not require 

those actions. 

Alternative Methods of Compliance 

(AMOCs) 

(j) The Manager, International Branch, 

ANM–116, has the authority to approve 

AMOCs for this AD, if requested in 

accordance with the procedures found in 14 

CFR 39.19. 

Related Information 

(k) French airworthiness directives 2001–

506(B) and 2001–507(B), both dated October 

17, 2001, also address the subject of this AD. 

Material Incorporated by Reference 

(l) You must use the service information 

identified in Table 2 of this AD to perform 

the actions that are required by this AD, 

unless the AD specifies otherwise. The 

Director of the Federal Register approved the 

incorporation by reference of these 

documents in accordance with 5 U.S.C. 

552(a) and 1 CFR part 51. Contact Airbus, 1 

Rond Point Maurice Bellonte, 31707 Blagnac 

Cedex, France, for a copy of this service 

information. You may review copies at the 

Docket Management Facility, U.S. 

Department of Transportation, 400 Seventh 

Street SW., Room PL–401, Nassif Building, 

Washington, DC; on the Internet at http:// 

dms.dot.gov; or at the National Archives and 

Records Administration (NARA). For 

information on the availability of this 

material at the NARA, call (202) 741–6030, 

or go to http://www.archives.gov/federalregister/cfr/ibr-locations.html. 

TABLE 2.—MATERIAL INCORPORATED

BY REFERENCE

Service 

Bulletin 

Revision 

level Date 

A330–53–3013 03 December 23, 

1999. 

A330–53–3014 05 June 20, 2003. 

A340–53–4021 05 January 27, 

2003. 

A340–53–4022 05 June 16, 2003. 

Issued in Renton, Washington, on 

September 9, 2005. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 05–18522 Filed 9–20–05; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2005–20347; Directorate 

Identifier 2004–NM–226–AD; Amendment 

39–14284; AD 2005–19–19] 

RIN 2120–AA64 

Airworthiness Directives; Boeing 

Model 737–300, –400, –500, –600, –700, 

–700C, –800 and –900 Series Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Boeing Model 737–300, –400, –500, 

–600, –700, –700C, –800 and –900 series 

airplanes. This AD requires installing an 

updated version of the operational 

program software (OPS) and certain 

other software in the flight management 

computers (FMCs); and doing 

configuration checks to ensure that 

certain software is properly installed 

and doing other specified actions. This 

AD also requires reinstalling software, if 

necessary. This AD results from one 

operator reporting FMC map shifts on 

several Model 737–400 series airplanes 

with dual FMCs, using OPS version 

U10.4A. We are issuing this AD to 

prevent the FMC from displaying the 

55240 Federal Register / Vol. 70, No. 182 / Wednesday, September 21, 2005 / Rules and Regulations 

incorrect actual navigation performance 

value to the flightcrew, which could 

prevent adequate alerting of a potential 

navigation error. This condition could 

result in a near miss with other 

airplanes or terrain, or collision if other 

warning systems also fail. 

DATES: Effective October 26, 2005. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in the AD 

as of October 26, 2005. 

ADDRESSES: You may examine the AD 

docket on the Internet at http:// 

dms.dot.gov or in person at the Docket 

Management Facility, U.S. Department 

of Transportation, 400 Seventh Street 

SW., Nassif Building, room PL–401, 

Washington, DC. 

Contact Boeing Commercial 

Airplanes, PO Box 3707, Seattle, 

Washington 98124–2207, for service 

information identified in this AD. 

FOR FURTHER INFORMATION CONTACT: Sam 

Slentz, Aerospace Engineer, Systems 

and Equipment Branch, ANM–130S, 

FAA, Seattle Aircraft Certification 

Office, 1601 Lind Avenue, SW., Renton, 

Washington 98055–4056; telephone 

(425) 917–6483; fax (425) 917–6590. 

SUPPLEMENTARY INFORMATION: 

Examining the Docket 

You may examine the AD docket on 

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

person at the Docket Management 

Facility office between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. The Docket 

Management Facility office (telephone 

(800) 647–5227) is located on the plaza 

level of the Nassif Building at the street 

address stated in the ADDRESSES section. 

Discussion 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an AD that would 

apply to certain Boeing Model 737–300, 

–400, –500, –600, –700, –700C, –800 

and –900 series airplanes. That NPRM 

was published in the Federal Register 

on February 15, 2005 (70 FR 7687). That 

NPRM proposed to require installing an 

updated version of the operational 

program software (OPS) in the flight 

management computers (FMCs), and 

doing other specified actions. That 

action also proposed to require 

reinstalling software, if necessary. 

Comments 

We provided the public the 

opportunity to participate in the 

development of this AD. We have 

considered the comments received. 

Support for the Proposed AD 

Two commenters support the 

proposed AD. 

Request To Revise Applicability 

Two commenters request that we 

revise the applicability of the NPRM so 

that it applies to Boeing Model 737–300, 

–400, –500, –600, –700, –700C, –800 

and –900 series airplanes equipped with 

two certain FMCs having part numbers 

(P/Ns) 171497–05–01 or 176200–01–01, 

installed with OPS versions U10.3, 

U10.4, U10.4A, or U10.5. One 

commenter, the airplane manufacturer, 

states that, although the airplanes 

identified in the effectivity of Boeing 

Alert Service Bulletins 737–34A1801 

and 737–34A1821, both dated July 15, 

2004, have at least one of the affected 

FMCs installed, not all of those 

airplanes have two of the affected FMCs 

installed. The commenter states that 

these airplanes also may not have the 

affected version of FMC OPS software 

installed. 

In addition, the same commenter 

states that, for Model 737–600, –700, 

–700C, –800 and –900 series airplanes, 

it began delivering airplanes with OPS 

version U10.5A on airplanes with line 

numbers 1529 and higher. The airplane 

manufacturer, therefore, also requests 

that we include affected line numbers 1 

through 1528 in the applicability of the 

NPRM. 

According to the second commenter, 

the changes in Boeing Alert Service 

Bulletin 737–34A1821 are only 

applicable to airplanes equipped with 

FMCs, which are 4 modular concept 

units (MCU) wide, installed with OPS 

version 10.0 and newer. The commenter 

states that many of the airplanes 

identified in the effectivity of Boeing 

Alert Service Bulletin 737–34A1821 

have FMCs that are 8 MCU wide and are 

installed with earlier versions of OPS, 

such as U5 and U7.5. The commenter 

also states that, for airplanes with 8–

MCU FMCs, operators would have to 

upgrade the hardware from 8 MCU to 4 

MCU and install new operational 

program configuration (OPC) software, 

before they could comply with the 

installation of OPS version U10.5A. 

We partially agree. By referencing the 

airplanes identified in Boeing Alert 

Service Bulletins 737–34A1801 and 

737–34A1821 in the applicability of the 

NPRM, we inadvertently applied the 

proposed AD to more airplanes than 

necessary. Furthermore, it was not our 

intention to require concurrent 

hardware and software changes as the 

second commenter points out. We have 

revised paragraph (c) of this AD to 

clarify that it applies to Model 737–300, 

–400, –500, –600, –700, –700C, –800 

and –900 series airplanes, certificated in 

any category; equipped with two certain 

FMCs having P/N 171497–05–01 or 

176200–01–01; installed with OPS 

version U10.3, U10.4, U10.4A, or U10.5. 

We cannot, however, include the line 

numbers of certain affected airplanes in 

the applicability of this AD. Although 

the commenter has provided the correct 

line numbers for the affected airplanes 

in this AD, we have determined, in 

coordination with the manufacturer, 

that we should not use line numbers in 

the applicability of an AD. In the past, 

using line numbers has caused errors in 

the effectivity of the service bulletin, 

and consequently in the applicability of 

the AD. Therefore, we have not added 

line numbers of certain airplanes to the 

applicability of this AD. 

Request To Exclude Certain Actions 

One commenter requests that we 

exclude the proposed requirement to 

maintain an onboard software media 

binder with the latest version of OPS. 

The commenter states this proposed 

requirement, which is referenced in 

paragraph (f) of the NPRM as one of the 

‘‘* * * other specified actions * * *,’’

could be interpreted as creating a 

regulatory requirement to keep a media 

binder onboard an affected airplane. 

The commenter also states that several 

operators have removed onboard media 

binders because they create an 

administrative burden. 

We agree that the requirement to 

replace the existing OPS disk set in the 

airplane’s software media binder with 

the new OPS disk set is not necessary 

for ensuring that the unsafe condition of 

this AD is adequately addressed. 

Therefore, we have deleted the 

requirement to do the other specified 

actions from paragraph (f) of this AD. 

Instead, we have added new paragraphs 

(f)(1) and (f)(2) to this AD, which specify 

installing certain software and doing 

certain configuration checks for 

adequately addressing the unsafe 

condition. We have also specified these 

actions in the Summary paragraph of 

this AD. 

Request To Use an Alternative Method 

of Compliance (AMOC) 

One commenter, the airplane 

manufacturer, requests that we allow 

the option of installing OPS version 

U10.6, in accordance with Boeing 

Service Bulletin 737–34–1768 (for 

Model 737–600, –700, –700C, –800, and 

–900 series airplanes) or Boeing Service 

Bulletin 737–34–1879 (for Model 737–

300, –400, and –500 series airplanes), as 

applicable. The commenter states that 

version U10.6 is based on version 

Federal Register / Vol. 70, No. 182 / Wednesday, September 21, 2005 / Rules and Regulations 55241 

U10.5a and also prevents the FMC from 

displaying the incorrect actual 

navigation performance value to the 

flightcrew. The commenter further 

states that version U10.6 is the latest 

certified version of FMC OPS software, 

and that it is currently installed in 

production on Model 737–300, –400, 

–500, –600, –700, –700C, –800 and –900 

series airplanes. 

We agree to allow operators the 

option of installing OPS version U10.6 

to address the unsafe condition of this 

AD. Since issuance of the NPRM, we 

have reviewed Boeing Service Bulletin 

737–34–1768 and Boeing Service 

Bulletin 737–34–1879, both dated 

August 11, 2005. These service bulletins 

describe procedures for installing OPS 

version U10.6 having P/N 549849–016 

and certain other software in the left 

and right FMCs, and doing 

configuration checks to ensure that 

certain software is properly installed. 

For Model 737–300, –400, and –500 

series airplanes, the certain other 

software includes the software options 

operational program configuration 

(OPC) software that was originally 

installed before installation of OPS 

version U10.6 and the navigational 

database (NDB) software. For Model 

737–600, –700, –700C, –800, and –900 

series airplanes, the certain other 

software includes the applicable OPC 

software, the new compatible model/ 

engine database (MEDB) software, and 

the NDB software. 

For certain Model 737–600, –700, 

–700C, –800, and –900 series airplanes, 

Boeing Service Bulletin 737–34–1768 

also describes procedures for installing 

common display system (CDS) OPC 

software in the left and right display 

electronic units. Operators should note 

that this is additional work, which is 

not required if an operator installs OPS 

version U10.5a in accordance with 

Boeing Alert Service Bulletin 737–

34A1801, dated July 15, 2004. We have 

determined that accomplishing the 

actions specified in the applicable 

service information adequately 

addresses the unsafe condition of this 

AD. Therefore, we have added a new 

paragraph (h) to this AD and re-lettered 

the subsequent paragraphs accordingly. 

Conclusion 

We have carefully reviewed the 

available data, including the comments 

received, and determined that air safety 

and the public interest require adopting 

the AD with the changes described 

previously. We have determined that 

these changes will neither increase the 

economic burden on any operator nor 

increase the scope of the AD. 

Costs of Compliance 

There are about 3,482 airplanes of the 

affected design in the worldwide fleet. 

This AD affects about 1,312 airplanes of 

U.S. registry. The following table 

provides the estimated costs for U.S. 

operators to comply with this AD. 

ESTIMATED COSTS

Boeing model Work hours 

Average labor 

rate 

per hour 

Parts Cost per 

airplane 

737–300, –400, and –500 series airplanes ..................................................... 1 $65 $15 $80 

737–600, –700, –700C, –800, and –900 series airplanes .............................. 2 65 15 145 

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 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. 

We prepared a regulatory evaluation 

of the estimated costs to comply with 

this AD. See the ADDRESSES section for 

a location to examine the regulatory 

evaluation. 

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 airworthiness 

directive (AD): 

2005–19–19 Boeing: Amendment 39–14284. 

Docket No. FAA–2005–20347; 

Directorate Identifier 2004–NM–226–AD. 

Effective Date 

(a) This AD becomes effective October 26, 

2005. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Boeing Model 737–

300, –400, –500, –600, –700, –700C, –800 and 

–900 series airplanes, certificated in any 

category; equipped with two Smiths 

Industries Aerospace Flight Management 

Computers (FMCs) having part number 

171497–05–01 or 176200–01–01; installed 

with operational program software (OPS) 

version U10.3, U10.4, U10.4A, or U10.5. 

55242 Federal Register / Vol. 70, No. 182 / Wednesday, September 21, 2005 / Rules and Regulations 

Unsafe Condition 

(d) This AD was prompted by one operator 

reporting FMC map shifts on several Model 

737–400 series airplanes with dual FMCs, 

using OPS version U10.4A. We are issuing 

this AD to prevent the FMC from displaying 

the incorrect actual navigation performance 

value to the flightcrew, which could prevent 

adequate alerting of a potential navigation 

error. This condition could result in a near 

miss with other airplanes or terrain, or 

collision if other warning systems also fail. 

Compliance 

(e) You are responsible for having the 

actions required by this AD performed within 

the compliance times specified, unless the 

actions have already been done. 

Install Updated Version of OPS 

(f) Within 180 days after the effective date 

of this AD, do the actions specified in 

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

accordance with the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

737–34A1801, dated July 15, 2004 (for Model 

737–600, –700, –700C, –800 and –900 series 

airplanes); or Boeing Alert Service Bulletin 

737–34A1821, dated July 15, 2004 (for Model 

737–300, –400, and –500 series airplanes); as 

applicable. Where the service bulletin 

specifies a configuration check, certificated 

maintenance personnel must perform the 

configuration check. 

(1) Install the updated version of the OPS, 

the compatible model/engine database 

(MEDB) software if applicable, the current 

version of the navigational database (NDB) 

software, and the software options database 

(OPC) in the left and right FMCs. 

(2) Do configuration checks of the left and 

right FMCs to ensure that the updated 

version of the OPS, compatible version of the 

MEDB software if applicable, and OPC 

software is correctly installed. 

Reinstall Software, if Necessary 

(g) If the incorrect software version of the 

OPS, MEDB software if applicable, or OPC 

software is found installed on any FMC 

during any configuration check required by 

paragraph (f) of this AD: Before further flight, 

reinstall the software, as applicable. Do the 

reinstallation of any software in accordance 

with the Accomplishment Instructions of 

Boeing Alert Service Bulletin 737–34A1801, 

dated July 15, 2004; or Boeing Alert Service 

Bulletin 737–34A1821, dated July 15, 2004; 

as applicable. 

Optional Installation of OPS Version U10.6 

(h) Doing the applicable actions specified 

in paragraphs (h)(1) and (h)(2) of this AD, in 

accordance with the Accomplishment 

Instructions of Boeing Service Bulletin 737–

34–1768, dated August 11, 2005 (for Model 

737–600, –700, –700C, –800, and –900 series 

airplanes); or Boeing Service Bulletin 737–

34–1879, dated August 11, 2005 (for Model 

737–300, –400, and –500 series airplanes), as 

applicable, is acceptable for compliance with 

the corresponding requirements of 

paragraphs (f) and (g) of this AD. 

(1) Install version U10.6 of the OPS 

software, the applicable OPC software, the 

new compatible MEDB software if applicable, 

and the NDB software in the left and right 

FMCs; install the common display system 

(CDS) OPC software in the left and right 

display electronic units if applicable; and do 

configuration checks to ensure that certain 

software is properly installed. Where the 

service bulletin specifies a configuration 

check, certificated maintenance personnel 

must perform the configuration check. 

(2) If the incorrect software version of the 

OPS, OPC software, CDS OPC software if 

applicable, or MEDB software if applicable, 

is found installed during any configuration 

check required by paragraph (h)(1) of this 

AD: Before further flight, reinstall the 

software, as applicable. Do the reinstallation 

of any software in accordance with the 

applicable service bulletin. 

Alternative Methods of Compliance 

(AMOCs) 

(i) The Manager, Seattle Aircraft 

Certification Office, FAA, has the authority to 

approve AMOCs for this AD, if requested in 

accordance with the procedures found in 14 

CFR 39.19. 

Material Incorporated by Reference 

(j) You must use Boeing Alert Service 

Bulletin 737–34A1801, dated July 15, 2004; 

or Boeing Alert Service Bulletin 737–

34A1821, dated July 15, 2004, as applicable, 

to perform the actions that are required by 

this AD, unless the AD specifies otherwise. 

The optional actions, if accomplished, must 

be performed in accordance with Boeing 

Service Bulletin 737–34–1768, dated August 

11, 2005; or Boeing Service Bulletin 737–34–

1879, dated August 11, 2005, as applicable. 

The Director of the Federal Register approved 

the incorporation by reference of these 

documents in accordance with 5 U.S.C. 

552(a) and 1 CFR part 51. Contact Boeing 

Commercial Airplanes, P.O. Box 3707, 

Seattle, Washington 98124–2207, for a copy 

of this service information. You may review 

copies at the Docket Management Facility, 

U.S. Department of Transportation, 400 

Seventh Street SW., room PL–401, Nassif 

Building, Washington, DC; on the Internet at 

http://dms.dot.gov; or at the National 

Archives and Records Administration 

(NARA). For information on the availability 

of this material at the NARA, call (202) 741–

6030, or go to http://www.archives.gov/ 

federal-register/cfr/ibr-locations.html. 

Issued in Renton, Washington, on 

September 12, 2005. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 05–18523 Filed 9–20–05; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2005–21344; Directorate 

Identifier 2004–NM–190–AD; Amendment 

39–14283; AD 2005–19–18] 

RIN 2120–AA64 

Airworthiness Directives; Short 

Brothers Model SD3 Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: The FAA is superseding an 

existing airworthiness directive (AD), 

which applies to all Short Brothers 

Model SD3–30 and SD3–60 airplanes 

equipped with certain fire 

extinguishers. That AD currently 

requires replacement of the covers for 

fire extinguisher adapter assemblies that 

are installed on certain bulkheads with 

new covers that swivel to lock the 

extinguishers in place; and replacement 

of nozzles and triggers on these fire 

extinguishers with better fitting nozzles 

and stronger triggers. The existing AD 

also currently requires the installation 

of new fire extinguisher point placards 

and a revision of the airplane flight 

manual (AFM) to instruct the flightcrew 

in the use of the new covers for these 

adapter assemblies. This new AD also 

requires modification of the fire 

extinguishing point adapter assembly of 

the forward and aft baggage bays as 

applicable. This new AD also adds 

airplanes to the applicability. For these 

new airplanes, this new AD requires a 

revision to the AFM for instructions on 

using the new fire extinguisher adapter. 

This AD results from reports of 

individuals experiencing fire 

extinguishant blowback when the 

extinguishant discharges through the 

fire extinguishing point adapters. We 

are issuing this AD to prevent fire 

extinguishant blowback, which could 

result in injury to a person using the fire 

extinguisher in the event of a fire. 

DATES: Effective October 26, 2005. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in the AD 

as of October 26, 2005. 

The Director of the Federal Register 

previously approved the incorporation 

by reference of certain other 

publications, as listed in the regulations, 

as of June 8, 1998 (63 FR 24387, May 

4, 1998). 

ADDRESSES: You may examine the AD 

docket on the Internet at http://