Federal Register / Vol. 76, No. 216 / Tuesday, November 8, 2011 / Proposed Rules 69159 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–1222; Directorate 

Identifier 2010–NM–268–AD] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes Model 737–600, 

–700, –700C, –800, –900, and –900ER 

Series Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for certain 

The Boeing Company Airplanes Model 

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

–900ER series airplanes. This proposed 

AD would require checking the escape 

slide girt for serviceability and 

replacement if necessary, modifying the 

cable routing provision, replacing the 

regulator padding, modifying the 

aspirator orientation, and modifying the 

valise. This proposed AD also would, 

for certain airplanes, require modifying 

or replacing the Vespel piston, 

modifying the pilot valve regulator, 

installing a new firing cable and safety 

pin, and modifying the slide valise. This 

proposed AD was prompted by reports 

of escape slides failing to deploy from 

the forward and aft right-hand doors 

during scheduled maintenance slide 

deployments, which could result in the 

slide being unusable during an 

emergency evacuation and increased 

likelihood of injury to passengers or 

crewmembers due to the difficulty in 

evacuating the aircraft. 

DATES: We must receive comments on 

this proposed AD by December 23, 

2011. 

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: Deliver to Mail 

address above between 9 a.m. and 

5 p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this proposed AD, contact Goodrich 

Corporation, Aircraft Interior Products, 

Attn: Technical Publications, 3414 

South Fifth Street, Phoenix, Arizona 

85040; phone: (602) 243–2270; email: 

george.yribarren@goodrich.com; 

Internet: http://www.goodrich.com/ 

TechPubs. 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. 

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 

(phone: (800) 647–5527) is in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

FOR FURTHER INFORMATION CONTACT: 

Patrick Gillespie, Aerospace Engineer, 

Cabin Safety & Environmental Systems 

Branch, ANM–150S, Seattle Aircraft 

Certification Office (ACO), FAA, 1601 

Lind Avenue SW., Renton, Washington 

98057–3356; phone: (425) 917–6429; 

fax: (425) 917–6590; email: 

Patrick.Gillespie@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposal. Send your comments to 

an address listed under the ADDRESSES

section. Include ‘‘Docket No. FAA– 

2011–1222; Directorate Identifier 2010– 

NM–268–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 

We have received eight reports from 

five operators of escape slides failing to 

deploy from the forward and aft righthand doors during scheduled 

maintenance slide deployments. During 

the attempted escape slide deployments, 

the valise release cable was caught in 

the gap between the latch bracket and 

the lower edge of the aft side of the 

compartment latch bracket. This caused 

the door to stall, ultimately preventing 

the door from fully opening, which 

prevented escape slide deployment. 

This condition, if not corrected, could 

result in the escape slide being unusable 

during an emergency evacuation and 

increased likelihood of injury to 

passengers or crewmembers due to the 

difficulty in evacuating the aircraft. 

Relevant Service Information 

We reviewed Goodrich Service 

Bulletin 5A3307–25–389, dated 

November 8, 2010. This service 

information describes procedures for 

checking the escape slide girt for 

continued serviceability, and replacing 

the girt with a new girt if necessary. 

This service information also describes 

procedures for modifying the cable 

routing provision on the girt by 

removing three Velcro tabs and 

installing two fabric tunnels. 

Additionally, this service information 

describes procedures for modifying the 

valise by removing the parachute spring 

band and installing an aspirator support 

pad, replacing the regulator valve 

padding with new padding, and 

repacking the slide with the aspirator in 

a different orientation within the slide 

pack. 

Concurrent Service Information 

For slides having certain part 

numbers, Goodrich Service Bulletin 

5A3307–25–389, dated November 8, 

2010, specifies concurrent 

accomplishment of a modification 

specified in Goodrich Service Bulletin 

5A3307–25–339, Revision 3, dated May 

8, 2009. The modification involves 

modifying certain pilot valve regulators 

by replacing the trigger housing, 

bushing, and rod; installing a new firing 

cable and safety pin; and modifying the 

slide valise to accept the safety pin used 

with the modified valve. 

For certain slides, Goodrich Service 

Bulletin 5A3307–25–389, dated 

November 8, 2010, also specifies 

concurrent accomplishment of Goodrich 

Service Bulletin 25–349, Revision 1, 

dated January 11, 2010, which describes 

procedures for modifying the Vespel 

piston in the regulator valves, or as an 

option to the modification, replacing the 

Vespel piston with a certain new or 

serviceable Vespel piston. 

Other Relevant Rulemaking 

Slides having part number (P/N) 

5A3307–3 are affected by Boeing 

Service Bulletin 737–25–1491, dated 

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69160 Federal Register / Vol. 76, No. 216 / Tuesday, November 8, 2011 / Proposed Rules 

April 23, 2007, which is mandated by 

AD 2008–24–08, Amendment 39–15748 

(73 FR 72320, November 28, 2008). The 

modification specified by Goodrich 

Service Bulletin 5A3307–25–339, 

Revision 3, dated May 8, 2009, is 

approved as an alternative method of 

compliance (AMOC) to the slide 

modification required by AD 2008–24– 

08. 

FAA’s Determination 

We are proposing this AD because we 

evaluated all the relevant information 

and determined the unsafe condition 

described previously is likely to exist or 

develop in other products of the same 

type design. 

Proposed AD Requirements 

This proposed AD would require 

accomplishing the actions specified in 

Goodrich Service Bulletin 5A3307–25– 

389, dated November 8, 2010; Goodrich 

Service Bulletin 5A3307–25–339, 

Revision 3, dated May 8, 2009; and 

Goodrich Service Bulletin 25–349, 

Revision 1, dated January 11, 2010; 

described previously. 

Costs of Compliance 

We estimate that this proposed AD 

affects 557 airplanes of U.S. registry. 

We estimate the following costs to 

comply with this proposed AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Check girt for serviceability, modify girt and 

valise, orientation, and replace padding.

2 work-hours × $85 

per hour = $170.

$223 ........................... $393 ........................... $218,901. 

Modify regulator valve, install cable and pin, 

and modify slide valise.

1 work-hour × $85 per 

hour = $85.

Between $1,749 and 

$1,836.

Between $1,834 and 

$1,921.

Between $1,021,538 

and $1,069,997. 

Modify Vespel piston ...................................... 1 work-hour × $85 per 

hour = $85.

$0 ............................... $85 ............................. $47,345. 

Optional Vespel piston replacement .............. 1 work-hour × $85 per 

hour = $85.

$612 ........................... $697 ........................... $388,229. 

We estimate the following costs to do 

any necessary replacements that would 

be required based on the results of the 

check of the girt. We have no way of 

determining the number of aircraft that 

might need these replacements. 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Girt replacement (Service Bulletin 5A3307–25–389) ....... 1 work-hour × $85 per hour = $85 .................................. $942 $1,027 

According to the parts supplier, some 

of the costs of this proposed AD may be 

covered under warranty, thereby 

reducing the cost impact on affected 

individuals. We do not control warranty 

coverage for affected individuals. As a 

result, we have included all costs in our 

cost estimate. 

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), 

(3) Will not affect intrastate aviation 

in Alaska, and 

(4) 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. 

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 airworthiness 

directive (AD): 

The Boeing Company: Docket No. FAA– 

2011–1222; Directorate Identifier 2010– 

NM–268–AD. 

(a) Comments Due Date 

We must receive comments by December 

23, 2011. 

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Federal Register / Vol. 76, No. 216 / Tuesday, November 8, 2011 / Proposed Rules 69161 

(b) Affected ADs 

This AD affects AD 2008–24–08, 

Amendment 39–15748 (73 FR 72320, 

November 28, 2008). 

(c) Applicability 

This AD applies to The Boeing Company 

Model 737–600, –700, –700C, –800, –900, 

and –900ER series airplanes, certificated in 

any category, with Goodrich Corporation 

door escape slide part number (P/N) 5A3086– 

1, –3, or –301, serial number (S/N) B3F001 

through B3F611 inclusive; P/N 5A3088–1, 

–3, or –301, S/N B3A001 through B3A685 

inclusive; or P/N 5A3307–1, –3, –5, or –301, 

S/N BNG0001 through BNG5707 inclusive. 

(d) Subject 

Joint Aircraft System Component (JASC)/ 

Air Transport Association (ATA) of America 

Code 25, Equipment/Furnishings. 

(e) Unsafe Condition 

This AD was prompted by reports of 

escape slides failing to deploy from the 

forward and aft right-hand doors during 

scheduled maintenance slide deployments. 

We are issuing this AD to prevent failure of 

an escape slide to deploy, which could result 

in the slide being unusable during an 

emergency evacuation and increased 

likelihood of injury to passengers or 

crewmembers due to the difficulty in 

evacuating the aircraft. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Girt Check and Slide Modification 

Within 36 months after the effective date 

of this AD: Do the actions in paragraph (g)(1) 

and (g)(2) of this AD. 

(1) Check the girt for continued 

serviceability, in accordance with the 

Accomplishment Instructions of Goodrich 

Service Bulletin 5A3307–25–389, dated 

November 8, 2010. If the girt is 

unserviceable: Before further flight, replace 

the girt with a new girt, in accordance with 

the Accomplishment Instructions of 

Goodrich Service Bulletin 5A3307–25–389, 

dated November 8, 2010. 

(2) Modify the cable routing provision on 

the girt, modify the valise, replace the 

regulator padding, and modify the aspirator 

orientation in the slide pack, in accordance 

with the Accomplishment Instructions of 

Goodrich Service Bulletin 5A3307–25–389, 

dated November 8, 2010 

(h) Concurrent Requirements 

(1) For slide P/N 5A3307–3 or 5A3307– 

301: Prior to or concurrently with 

accomplishing the actions required by 

paragraph (g) of this AD, modify the pilot 

valve regulator P/N 4A3865–2, –3, or –4, as 

applicable; install a new firing cable and 

safety pin; and modify the slide valise; in 

accordance with the Accomplishment 

Instructions of Goodrich Service Bulletin 

5A3307–25–339, Revision 3, dated May 8, 

2009. 

(2) For slide P/N 5A3307–3, 5A3307–5, or 

5A3307–301: Prior to or concurrently with 

accomplishing the actions required by 

paragraph (g) of this AD, modify the Vespel 

piston in the regulator valves or replace the 

Vespel piston with a new or serviceable 

Vespel piston P/N 3A3566–2 or 3A3832–2, as 

applicable, in accordance with the 

Accomplishment Instructions of Goodrich 

Service Bulletin 25–349, Revision 1, dated 

January 11, 2010. 

(i) Credit for Actions Accomplished in 

Accordance With Previous Service 

Information 

(1) Modifying the pilot valve regulator, 

installing a new firing cable and safety pin, 

or modifying the slide valise in accordance 

with Goodrich Service Bulletin 5A3307–25– 

339, Revision 1, dated September 26, 2003; 

or Revision 2, dated March 31, 2004; before 

the effective date of this AD is acceptable for 

compliance with the corresponding 

modification or installations required by 

paragraph (h) of this AD. 

(2) Modifying or replacing the Vespel 

piston in the regulator valves, in accordance 

with Goodrich Service Bulletin 25–349, 

dated September 15, 2004, before the 

effective date of this AD is acceptable for 

compliance with the corresponding 

modification required by paragraph (h) of 

this AD. 

(j) Parts Installation 

As of the effective date of this AD, no 

person may install on any airplane a part 

identified in paragraph (j)(1), (j)(2), or (j)(3) 

of this AD. 

(1) A regulator having P/N 4A3865–2, –3, 

or –4. 

(2) An evacuation system having P/N 

5A3086–1, –3, or –301, serial number (S/N) 

B3F001 through B3F611 inclusive; P/N 

5A3088–1, –3, or –301, S/N B3A001 through 

B3A685 inclusive; or P/N 5A3307–1, –3, –5, 

or –301, S/N BNG0001 through BNG5707 

inclusive. 

(3) Regulator valve padding having P/N 

3A4047–13. 

(k) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Seattle Aircraft 

Certification Office, FAA, has the authority to 

approve AMOCs for this AD, if requested 

using the procedures found in 14 CFR 39.19. 

In accordance with 14 CFR 39.19, send your 

request to your principal inspector or local 

Flight Standards District Office, as 

appropriate. If sending information directly 

to the manager of the ACO, send it to the 

attention of the person identified in the 

Related Information section of this AD. 

Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the local flight standards district office/ 

certificate holding district office. 

(l) Related Information 

(1) For more information about this AD, 

contact Patrick Gillespie, Aerospace 

Engineer, Cabin Safety & Environmental 

Systems Branch, ANM–150S, Seattle Aircraft 

Certification Office (ACO), FAA, 1601 Lind 

Avenue SW., Renton, Washington 98057– 

3356; phone: (425) 917–6429; fax: (425) 917– 

6590; email: Patrick.Gillespie@faa.gov. 

(2) For service information identified in 

this AD, contact Goodrich Corporation, 

Aircraft Interior Products, Attn: Technical 

Publications, 3414 South Fifth Street, 

Phoenix, Arizona 85040; phone: (602) 243– 

2270; email: george.yribarren@goodrich.com; 

Internet: http://www.goodrich.com/ 

TechPubs. You may review copies of the 

referenced service information at the FAA, 

Transport Airplane Directorate, the FAA, 

1601 Lind Avenue SW., Renton, Washington. 

For information on the availability of this 

material at the FAA, call (425) 227–1221. 

Issued in Renton, Washington, on October 

27, 2011. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2011–28856 Filed 11–7–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–1227; Directorate 

Identifier 2011–NM–100–AD] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for all 

Bombardier, Inc. Model CL–600–2C10 

(Regional Jet Series 700, 701, & 702) 

airplanes; Model CL–600–2D15 

(Regional Jet Series 705) airplanes; and 

Model CL–600–2D24 (Regional Jet 

Series 900) airplanes. 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: 

A number of reports of aileron control 

stiffness have been received on Bombardier 

Regional Jet aeroplanes. Bombardier has 

reviewed the current maintenance tasks for 

the aileron control system and determined 

that an additional maintenance task is 

required. 

* * * [A]ileron control stiffness during flight 

* * * could result in reduced controllability 

of the aeroplane. 

The proposed AD would require 

actions that are intended to address the 

unsafe condition described in the MCAI. 

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