Federal Register / Vol. 76, No. 49 / Monday, March 14, 2011 / Proposed Rules 13541 

(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. 

Related Information 

(j) Refer to MCAI Ageˆncia Nacional de 

Aviac ̧a ̃o Civil (ANAC) Airworthiness 

Directive 2010–08–02, dated September 20, 

2010; and EMBRAER Service Bulletins 190– 

54–0010, dated May 19, 2010, and 190LIN– 

54–001, dated June 21, 2010; for related 

information. 

Issued in Renton, Washington, on March 4, 

2011. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2011–5723 Filed 3–11–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–0219; Directorate 

Identifier 2010–NM–228–AD] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Model 757–200, –200CB, and 

–300 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 the 

products listed above. This proposed 

AD would require modifying the door 

latch fittings and witness mark placards 

of the off-wing escape slide systems; 

and for certain airplanes, replacing the 

bearings and lockbase retainer in the 

door latch assembly, relocating and 

adjusting of the sensor target and the 

sensor proximity switch, and testing to 

ensure positive door locking and 

corrective action if necessary. For 

certain airplanes, this proposed AD 

would also require installing a bumper 

assembly and placards. This proposed 

AD was prompted by reports of in-flight 

loss of the off-wing escape slide. We are 

proposing this AD to prevent in-flight 

loss of the off-wing escape slide, which 

could result in the unavailability of the 

escape slide during a time-critical 

evacuation. Additionally, the departed 

slide could cause damage to the 

fuselage, wing, flaps, or stabilizer, 

which could degrade flight control. 

DATES: We must receive comments on 

this proposed AD by April 28, 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 Boeing 

Commercial Airplanes, Attention: Data 

& Services Management, P. O. Box 3707, 

MC 2H–65, Seattle, Washington 98124– 

2207; phone: 206–544–5000, extension 

1; fax: 206–766–5680; e-mail: 

me.boecom@boeing.com; Internet: 

ttps:// 

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. 

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: 

Kimberly DeVoe, Aerospace Engineer, 

Cabin Safety and Environmental 

Systems Branch, ANM–150S, Seattle 

Aircraft Certification Office (ACO), 

FAA, 1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; phone: 425– 

917–6495; fax: 425–917–6590; e-mail: 

Kimberly.Devoe@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– 

2011–0219; Directorate Identifier 2010– 

NM–228–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 

Since May 2005, four operators have 

reported seven events of in-flight loss of 

the off-wing escape slides. The off-wing 

escape slides did not inflate in flight. 

Due to latching failures of the 

compartment doors for the off-wing 

escape slides, in-flight maneuvering 

resulted in the departure of the slides 

from the airplane. The loss of the offwing escape slide could result in the 

unavailability of the escape slide during 

a time-critical evacuation. Additionally, 

the departed slide could cause damage 

to the fuselage, wing, flaps, or stabilizer, 

which could degrade flight control. 

Related Rulemaking 

To address the in-flight loss of the offwing escape slide we issued AD 99–17– 

20, Amendment 39–11266 (64 FR 

45436, August 20, 1999), which was 

based on Boeing Service Bulletin 757– 

25–0182, Revision 1, dated June 12, 

1997; and Boeing Service Bulletin 757– 

25–0200, dated January 21, 1999. AD 

99–17–20 requires modification of the 

door latch system on the off-wing 

escape slide compartment and 

installation of a bumper assembly on the 

bottom of the off-wing escape slide 

carriers on certain Model 757–200 and 

–300 series airplanes. However, it has 

been shown through service history that 

more corrective actions, in addition to 

AD 99–17–20, are needed to correct the 

unsafe condition. 

Relevant Service Information 

We reviewed Boeing Special 

Attention Service Bulletin 757–25– 

0298, dated October 16, 2008. This 

service bulletin describes procedures for 

modifying the forward and aft door 

latch fittings for the left and right offwing escape slide systems and 

modifying the witness mark placards on 

the maintenance access door frames for 

the left and right off-wing escape slide 

systems. Additionally, this service 

bulletin specifies that the following 


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13542 Federal Register / Vol. 76, No. 49 / Monday, March 14, 2011 / Proposed Rules 

three service bulletins should be done 

before or at the same time as Boeing 

Special Attention Service Bulletin 757– 

25–0298, dated October 16, 2008. 

Boeing Service Bulletin 757–25–0182, 

Revision 2, dated January 11, 2001, 

specifies, for airplanes that have not 

been retrofitted using Boeing Service 

Bulletin 757–25–0182, dated October 

10, 1996; or Boeing Service Bulletin 

757–25–0182, Revision 1, dated June 12, 

1997; procedures to modify the door 

latch system of the left and right offwing emergency evacuation slide 

systems. The modification includes 

replacing the bearings and lockbase 

retainer in the compartment door latch 

assembly with new bearings and a new 

lockbase retainer, and relocating and 

adjusting the sensor target and the 

sensor proximity switch to forward 

locations on the evacuation slide 

compartment doors. For airplanes that 

have been retrofitted, Boeing Service 

Bulletin 757–25–0182, Revision 2, dated 

January 11, 2001, specifies testing to 

determine that the compartment door 

sensor, as retrofitted, provides an 

accurate indication of the door lock 

condition. For airplanes on which the 

test indicates that the compartment door 

is not locking positively, Boeing Service 

Bulletin 757–25–0182, Revision 2, dated 

January 11, 2001, specifies that the 

installed target is replaced with a new 

target and the switch is remounted on 

the new bracket. 

Boeing Service Bulletin 757–25–0200, 

Revision 1, dated August 3, 2000 (for 

Model 757–200 and –200CB series 

airplanes); and Boeing Special Attention 

Service Bulletin 757–25–0219, dated 

August 3, 2000 (for Model 757–300 

series airplanes); specify installing a 

bumper assembly on the left and right 

off-wing slide carriers, and installing 

new witness mark and instruction 

placards in the area of the maintenance 

access door. 

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 designs. 

Proposed AD Requirements 

This proposed AD would require 

accomplishing the actions specified in 

the service information described 

previously. 

Costs of Compliance 

We estimate that this proposed AD 

will affect 451 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 

Modification of fittings and placards: Service 

Bulletin (SB) 757–25–0298.

7 work-hours × $85 per hour = $595 ............. $1,365 $1,960 $883,960. 

Modification: Service Bulletin 757–25–0182 ... 40 work-hours × $85 per hour = $3,400 ........ $2,786 $6,186 $1,880,544 

(304 airplanes). 

Test: Service Bulletin 757–25–0182 ............... 2 work-hours × $85 per hour = $170 ............. $0 $170 $76,670. 

Bumper assembly and placards installation: 

Service Bulletin 757–25–0200.

4 work-hours × $85 per hour = $340 ............. $457 $797 $272,574 

(342 airplanes). 

Bumper assembly and placards installation: 

Service Bulletin 757–25–0219.

4 work-hours × $85 per hour = $340 ............. $457 $797 $0 

(0 airplanes). 

We estimate the following costs to do 

any necessary replacements that would 

be required based on the results of the 

proposed test. 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 

Replacement and remount; SB 757–25–0182 ................. 4 work-hours × $85 per hour = $340 ............................... $2,786 $3,126 

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. 


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Federal Register / Vol. 76, No. 49 / Monday, March 14, 2011 / Proposed Rules 13543 

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– 

2011–0219; Directorate Identifier 2010– 

NM–228–AD. 

Comments Due Date 

(a) We must receive comments by April 28, 

2011. 

Affected ADs 

(b) Certain requirements of this AD affect 

certain requirements of AD 99–17–20, 

Amendment 39–11266. 

Applicability 

(c) This AD applies to The Boeing 

Company Model 757–200, –200CB, and –300 

series airplanes, certificated in any category, 

as identified in Boeing Special Attention 

Service Bulletin 757–25–0298, dated October 

16, 2008; with off-wing escape slide systems 

installed. 

Subject 

(d) Joint Aircraft System Component 

(JASC)/Air Transport Association (ATA) of 

America Code 25, Equipment and 

Furnishings. 

Unsafe Condition 

(e) This AD was prompted by reports of inflight loss of the off-wing escape slide. We 

are issuing this AD to prevent in-flight loss 

of the off-wing escape slide, which could 

result in the unavailability of the escape slide 

during a time-critical evacuation. 

Additionally, the departed slide could cause 

damage to the fuselage, wing, flaps, or 

stabilizer, which could degrade flight control. 

Compliance 

(f) Comply with this AD within the 

compliance times specified, unless already 

done. 

Modification 

(g) Within 60 months after the effective 

date of this AD, modify the door latch fittings 

and witness mark placards of the left and 

right off-wing escape slide systems, in 

accordance with the Accomplishment 

Instructions of Boeing Special Attention 

Service Bulletin 757–25–0298, dated October 

16, 2008. 

Concurrent Actions 

(h) Concurrently with or before 

accomplishing the actions specified in 

paragraph (g) of this AD, do the applicable 

actions specified in paragraphs (h)(1) and 

(h)(2) of this AD. 

(1) For airplanes that have not been 

modified by Boeing Service Bulletin 757–25– 

0182, dated October 10, 1996; or Revision 1, 

dated June 12, 1997; as of the effective date 

of this AD: Modify the door latch system of 

the left and right off-wing emergency 

evacuation slide systems, in accordance with 

the Accomplishment Instructions of Boeing 

Service Bulletin 757–25–0182, Revision 2, 

dated January 11, 2001. 

(2) For airplanes that have been modified 

by Boeing Service Bulletin 757–25–0182, 

dated October 10, 1996; or Revision 1, dated 

June 12, 1997; as of the effective date of this 

AD: Do a test to verify that the modified 

compartment door sensor provides an 

accurate indication of the door lock 

condition, in accordance with the 

Accomplishment Instructions of Boeing 

Service Bulletin 757–25–0182, Revision 2, 

dated January 11, 2001. If the test indicates 

that the compartment door is not locking 

positively, concurrently with or before 

accomplishing the actions specified in 

paragraph (g) of this AD, replace the target 

and remount the switch on the new bracket, 

in accordance with the Accomplishment 

Instructions of Boeing Service Bulletin 757– 

25–0182, Revision 2, dated January 11, 2001. 

(i) For airplanes identified in Boeing 

Service Bulletin 757–25–0200, Revision 1, 

dated August 3, 2000: Concurrently with or 

before accomplishing the actions required by 

paragraph (g) of this AD, install a bumper 

assembly on the left and right off-wing 

escape slide carriers, and install new 

placards in the area of the maintenance 

access door, in accordance with the 

Accomplishment Instructions of Boeing 

Service Bulletin 757–25–0200, Revision 1, 

dated August 3, 2000. 

(j) For airplanes identified in Boeing 

Special Attention Service Bulletin 757–25– 

0219, dated August 3, 2000: Concurrently 

with or before accomplishing the actions 

required by paragraph (g) of this AD, install 

a bumper assembly on the left and right offwing escape slide carriers, and install new 

placards in the area of the maintenance 

access door, in accordance with the 

Accomplishment Instructions of Boeing 

Special Attention Service Bulletin 757–25– 

0219, dated August 3, 2000. 

Terminating Action for Paragraph (a)(1) of 

AD 99–17–20 

(k) Actions done in accordance with 

paragraph (h)(1) of this AD terminate the 

requirements of paragraph (a)(1) of AD 99– 

17–20. 

Terminating Action for Paragraph (a)(2) of 

AD 99–17–20 

(l) Actions done in accordance with 

paragraph (i) of this AD terminate the 

corresponding requirements of paragraph 

(a)(2) of AD 99–17–20. 

Credit for Actions Accomplished in 

Accordance with Previous Service 

Information 

(m) Actions done before the effective date 

of this AD in accordance with Boeing Service 

Bulletin 757–25–0200, dated January 21, 

1999, are acceptable for compliance with the 

corresponding requirements of paragraphs (i) 

and (j) of this AD. 

Alternative Methods of Compliance 

(AMOCs) 

(n)(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 e-mailed 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. 

Related Information 

(o) For more information about this AD, 

contact Kimberly DeVoe, Aerospace 

Engineer, Cabin Safety and Environmental 

Systems Branch, ANM–150S, Seattle Aircraft 

Certification Office (ACO), FAA, 1601 Lind 

Avenue SW., Renton, Washington 98057– 

3356; phone: 425–917–6495; fax: 425–917– 

6590; e-mail: Kimberly.Devoe@faa.gov. 

(p) 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; phone: 

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. 

Issued in Renton, Washington, on March 3, 

2011. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2011–5724 Filed 3–11–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–0217; Directorate 

Identifier 2010–NM–165–AD] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Model DC–9–81 (MD–81), 

DC–9–82 (MD–82), DC–9–83 (MD–83), 

DC–9–87 (MD–87), and MD–88 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 


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