10352 Federal Register / Vol. 77, No. 35 / Wednesday, February 22, 2012 / Rules and Regulations 

purpose or requirement supported by 

compelling evidence of significantly 

less intrusive means or of a substantially 

more efficient method of accomplishing 

the same supervisory purpose; and 

(8) Such other factors as determined 

by FHFA to be relevant to determining 

and evaluating the need for and 

effectiveness of a particular regulation. 

c. Regulatory review process.—(1) The 

regulatory reviews will be conducted by 

the FHFA Office of General Counsel, 

under the direction of the General 

Counsel, and will include internal 

consultation with other FHFA offices 

and staff, guidance provided by the 

FHFA Director, as well as consideration 

of public comments. 

(2) A review and report of findings 

and recommendations will be provided 

to the FHFA Director on a timely basis. 

The report of findings and 

recommendations will be privileged and 

confidential. 

(3) After receiving the report of 

findings and recommendations, the 

FHFA Director will determine what 

steps may be necessary to relieve any 

unnecessary burden, including 

amendment to or repeal of existing 

regulations or issuance of less formal 

guidance. 

d. No right of action. The regulatory 

reviews are not formal or informal 

rulemaking proceedings under the 

Administrative Procedure Act and 

create no right of action against FHFA. 

Moreover, the determination of FHFA to 

conduct or not to conduct a review of 

a regulation and any determination, 

finding, or recommendation resulting 

from any review are not final agency 

actions and, as such, are not subject to 

judicial review. 

Dated: February 15, 2012. 

Edward J. DeMarco, 

Acting Director, Federal Housing Finance 

Agency. 

[FR Doc. 2012–4056 Filed 2–21–12; 8:45 am] 

BILLING CODE 8070–01–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0956; Directorate 

Identifier 2010–NM–018–AD; Amendment 

39–16951; AD 74–08–09 R3] 

RIN 2120–AA64 

Airworthiness Directives; Various 

Transport Category Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are revising an existing 

airworthiness directive (AD) for 

transport category airplanes that have 

one or more lavatories equipped with 

paper or linen waste receptacles. That 

AD currently requires installation of 

placards prohibiting smoking in the 

lavatory and disposal of cigarettes in the 

lavatory waste receptacles; 

establishment of a procedure to 

announce to airplane occupants that 

smoking is prohibited in the lavatories; 

installation of ashtrays at certain 

locations; and repetitive inspections to 

ensure that lavatory waste receptacle 

doors operate correctly. This new AD 

extends the time an airplane may be 

operated with certain missing ashtrays. 

This AD was prompted by the 

determination that certain compliance 

times required by the existing AD could 

be extended and still address fires 

occurring in lavatories caused by, 

among other things, the improper 

disposal of smoking materials in 

lavatory waste receptacles. We are 

issuing this AD to correct this unsafe 

condition on these products. 

DATES: This AD is effective March 28, 

2012. 

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 (phone: 800–647–5527) is 

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: 

Alan Sinclair, Aerospace Engineer, 

Airframe/Cabin Safety Branch, ANM– 

115, Transport Airplane Directorate, 

FAA, 1601 Lind Avenue SW., Renton, 

Washington 98057–3356; phone: 425– 

227–2195; fax: 425–227–1232. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to revise AD 74–08–09 R2, 

Amendment 39–9680 (61 FR 32318, 

June 24, 1996). That AD applies to the 

specified products. The NPRM 

published in the Federal Register on 

October 6, 2010 (75 FR 61657). That 

NPRM proposed to continue to require 

installation of placards prohibiting 

smoking in the lavatory and disposal of 

cigarettes in the lavatory waste 

receptacles; establishment of a 

procedure to announce to airplane 

occupants that smoking is prohibited in 

the lavatories; installation of ashtrays at 

certain locations; and repetitive 

inspections to ensure that lavatory 

waste receptacle doors operate correctly. 

That NPRM also proposed to extend the 

time an airplane may be operated with 

certain missing ashtrays. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. The 

following presents the comments 

received on the NPRM (75 FR 61657, 

October 6, 2010) proposal and the 

FAA’s response to each comment. 

Support for the NPRM 

Air Line Pilots Association, 

International (ALPA), Boeing, and Air 

Transport Association (ATA) supported 

the intent of the NPRM (75 FR 61657, 

October 6, 2010). 

Request to Credit MPD Task Cards 

MNG Airlines reported that some 

airplane manufacturers’ maintenance 

planning documents (MPDs) include the 

requirements of AD 74–08–09 R2, 

Amendment 39–9680 (61 FR 32318, 

June 24, 1996), in a task card, which the 

operators add to their own MPDs for 

their fleet. The commenter requested 

that we revise the NPRM (75 FR 61657, 

October 6, 2010) by indicating that, if a 

manufacturer’s and operator’s MPDs 

cover a task card, the AD requirements 

are automatically satisfied. 

We disagree with the request. 

Operators determine how to track the 

implementation and compliance of the 

AD requirements for their fleet. We do 

not consider it appropriate to include 

AD provisions that apply only to certain 

operators. It is not necessary to change 

the final rule to include this provision. 

Request To Clarify Relief Provisions 

ATA recommended that we simplify 

and clarify the proposed relief 

provisions for airplanes having multiple 

lavatory doors. For those airplanes, ATA 

recommended that we revise the NPRM 

(75 FR 61657, October 6, 2010) to 

provide MMEL (Master Minimum 

Equipment List) relief for up to—and 

including—50 percent of the ashtrays 

for 10 days. (The NPRM specified only 

‘‘up to’’ 50 percent of the ashtrays.) ATA 

noted that this recommendation would 

(1) Remove the proposed requirement to 

replace half of the missing ashtrays 

within 3 days; (2) provide a level of 

safety equal to or exceeding the level 

proposed for airplanes having only one 


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Federal Register / Vol. 77, No. 35 / Wednesday, February 22, 2012 / Rules and Regulations 10353 

lavatory door; (3) simplify the 

management and oversight of MMEL 

relief by operators and FAA inspectors; 

and (4) clarify that the phrase ‘‘up to’’ 

includes 50 percent, which would 

eliminate differing interpretations. 

We have reviewed the ATA proposal. 

While we agree that the proposal has 

merit, we find that it does not account 

for all possible scenarios. Paragraph (j) 

of the AD allows 3 days to install any 

ashtrays if more than 50 percent of the 

ashtrays are missing. The commenter’s 

proposed change, on the other hand, 

could ground airplanes: If, for example, 

2 of 2 ashtrays are missing, 1 ash tray 

must be installed before further flight. 

We have therefore not changed the final 

rule regarding this issue. But, according 

to the provisions of paragraph (m) of 

this AD, we may approve requests to 

adjust the compliance schedule if the 

request includes data substantiating that 

the new schedule would provide an 

acceptable level of safety. 

Request To Revise Compliance Time 

Thomas Edward Young requested that 

we clarify paragraph (j) of the NPRM (75 

FR 61657, October 6, 2010) to address 

the case of a single ashtray missing on 

an airplane with multiple lavatory door 

ashtrays. Mr. Young provided 

alternative text to address this situation. 

We disagree with the request. 

Paragraph (j) of this AD adequately 

covers the scenario described by the 

commenter. We have not changed the 

final rule regarding this issue. 

Request To Clarify Proposed Changes 

ALPA requested clarification of the 

relief proposed in the NPRM (75 FR 

61657, October 6, 2010) for two possible 

scenarios. 

First, ALPA was concerned about 

possible confusion of the AD 

requirements for airplanes with an odd 

number of multiple lavatory doors with 

missing or inoperative ashtrays. In this 

case, the 50 percent criteria specified in 

the AD would result in a fractional 

number. ALPA therefore suggested that 

we revise the NPRM (75 FR 61657, 

October 6, 2010) to ensure that a 

fractional number of ashtrays be 

rounded to the next higher whole 

number. 

Second, ALPA noted that, if there are 

groups of lavatories in multiple 

locations throughout an airplane, 

compliance with the proposed 

requirements aircraft-wide could result 

in all of the ashtrays in a group being 

missing or inoperative. To ensure that 

the required extinguishing capability is 

retained, ALPA therefore recommended 

an additional requirement to ensure that 

at least one lavatory door in each group 

of lavatories has a serviceable ashtray. 

We disagree with the requests, 

although we considered both 

recommendations during the drafting of 

this revision of the AD. We determined 

that the commenter’s first 

recommendation (to address airplanes 

with an odd number of missing 

ashtrays) would have only added to the 

complexity of the AD. If the calculation 

of ashtrays needing to be replaced 

results in a fractional number, operators 

will need to round up this figure. The 

only way to replace 2.5 ashtrays, for 

example, is to replace 3 ashtrays. We 

find that additional clarification is not 

necessary. 

We determined that the commenter’s 

second recommendation (to address 

airplanes with all ashtrays missing in a 

group of lavatories) would have resulted 

in confusing and overly complicated 

requirements. The AD’s more simplified 

approach adequately addresses the 

unsafe condition. 

We have not changed the AD 

regarding these issues. 

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 

This action merely extends a certain 

compliance time and does not add any 

new additional economic burden on 

affected operators. The relief provided 

by this AD allows operators to continue 

to operate airplanes without the 

required number of ashtrays for a longer 

period of time than was previously 

permitted. This results in reduced costs 

to affected operators since it reduces the 

potential interruptions in service to 

reinstall the ashtrays. The current costs 

associated with this AD are provided 

below for the convenience of affected 

operators. The following table provides 

the estimated costs for U.S. operators to 

comply with this AD. 

ESTIMATED COSTS

Action Work 

hours 

Average 

labor rate 

per hour 

Parts Cost per airplane 

Placard installations ................................ 1 $85 Negligible ...................................... $85. 

Inspections .............................................. 2 85 0 ................................................... $170 per inspection cycle. 

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), 

(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. 


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10354 Federal Register / Vol. 77, No. 35 / Wednesday, February 22, 2012 / Rules and Regulations 

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 

removing airworthiness directive (AD) 

74–08–09 R2, Amendment 39–9680 (61 

FR 32318, June 24, 1996), and adding 

the following new AD: 

74–08–09 R3 Transport category airplanes: 

Amendment 39–16951; Docket No. 

FAA–2010–0956; Directorate Identifier 

2010–NM–018–AD. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective March 28, 2012. 

(b) Affected ADs 

This AD revises AD 74–08–09 R2, 

Amendment 39–9680 (61 FR 32318, June 24, 

1996). 

(c) Applicability 

This AD applies to transport category 

airplanes, certificated in any category, that 

have one or more lavatories equipped with 

paper or linen waste receptacles. These 

lavatories may be on various airplanes, 

identified in but not limited to the airplanes 

of the manufacturers included in table 1 of 

this AD. 

TABLE 1—AFFECTED AIRPLANES

Airplane manufacturer 

328 Support Services GmbH (Type Certificate previously held by AvCraft Aerospace 

GmbH; Fairchild Dornier GmbH; Dornier 

Luftfahrt GmbH). 

AEROSPATIALE (Societe Nationale 

Industrielle Aerospatiale). 

Airbus. 

ATR—GIE Avions de Transport Re ́gional. 

BAE Systems (Operations) Limited. 

The Boeing Company. 

Bombardier, Inc. 

British Aerospace Regional Aircraft. 

Cessna Aircraft Company. 

DASSAULT AVIATION. 

EADS CASA (Type Certificate previously 

held by Construcciones Aeronauticas, 

S.A.). 

Empresa Brasileira de Aeronautica S.A. 

(EMBRAER). 

Fokker Services B.V. 

Gulfstream Aerospace Corporation. 

TABLE 1—AFFECTED AIRPLANES— 

Continued 

Airplane manufacturer 

Gulfstream Aerospace LP (Type Certificate 

previously held by Israel Aircraft Industries, 

Ltd.). 

Hamburger Flugzeugbau GmbH. 

Hawker Beechcraft Corporation (Type Certificate previously held by Raytheon Aircraft 

Company; Beech Aircraft Corporation). 

Israel Aircraft Industries, Ltd. 

Learjet Inc. 

Lockheed Aircraft Corporation. 

Lockheed Martin Corporation/Lockheed Martin Aeronautics Company. 

Maryland Air Industries, Inc. 

McDonnell Douglas Corporation. 

Mitsubishi Heavy Industries, Ltd. 

Saab AB, Saab Aerosystems. 

Sabreliner Corporation. 

Short Brothers PLC. 

Vickers-Armstrongs (Aircraft Limited). 

Viking Air Limited (Type Certificate previously 

held by Bombardier, Inc.) 

(d) Subject 

Air Transport Association (ATA) of 

America Code 25: Equipment/furnishings. 

(e) Unsafe Condition 

This revision to the AD (AD 74–08–09 R2 

(61 FR 32318, June 24, 1996)) was prompted 

by the determination that certain compliance 

times required by the existing AD may be 

extended and still address fires occurring in 

lavatories caused by, among other things, the 

improper disposal of smoking materials in 

lavatory waste receptacles. This revision to 

the AD would continue to prevent possible 

fires that could result from smoking materials 

being dropped into lavatory paper or linen 

waste receptacles. 

(f) Compliance 

You are responsible for having the actions 

required by this AD performed within the 

compliance times specified, unless the 

actions have already been done. 

(g) Restatement of Requirements of AD 74– 

08–09 R2, Amendment 39–9680 (61 FR 

32318, June 24, 1996): Placard Installation 

Within 60 days after August 6, 1974 (the 

effective date of AD 74–08–09, Amendment 

39–1917 (39 FR 28229, August 6, 1974)), or 

before the accumulation of any time in 

service on a new production aircraft after 

delivery, whichever occurs later—except that 

new production aircraft may be flown in 

accordance with sections 21.197 and 21.199 

of the Federal Aviation Regulations (14 CFR 

21.197 and 21.199) to a base where 

compliance may be accomplished: 

Accomplish the requirements of paragraphs 

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

(1) Install a placard on each side of each 

lavatory door over the door knob, or on each 

side of each lavatory door, or adjacent to each 

side of each lavatory door. The placards must 

contain the legible words ‘‘No Smoking in 

Lavatory’’ or ‘‘No Smoking,’’ or contain ‘‘No 

Smoking’’ symbology in lieu of words, or 

contain both wording and symbology, to 

indicate that smoking is prohibited in the 

lavatory. The placards must be of sufficient 

size and contrast and be located so as to be 

conspicuous to lavatory users. And 

(2) Install a placard on or near each 

lavatory paper or linen waste disposal 

receptacle door, containing the legible words 

or symbology indicating ‘‘No Cigarette 

Disposal.’’ 

(h) Restatement of Requirements of AD 74– 

08–09 R2, Amendment 39–9680 (61 FR 

32318, June 24, 1996): Announcement 

Procedures 

Within 30 days after August 6, 1974 (the 

effective date of AD 74–08–09, Amendment 

39–1917 (39 FR 28229, August 6, 1974)), 

establish a procedure that requires that, no 

later than a time immediately after the ‘‘No 

Smoking’’ sign is extinguished following 

takeoff, an announcement be made by a 

crewmember to inform all aircraft occupants 

that smoking is prohibited in the aircraft 

lavatories; except that, if the aircraft is not 

equipped with a ‘‘No Smoking’’ sign, the 

required procedure must provide that the 

announcement be made prior to each takeoff. 

(i) Restatement of Requirements of AD 74– 

08–09 R2, Amendment 39–9680 (61 FR 

32318, June 24, 1996): Ashtray Installation 

Except as provided by paragraph (j) of this 

AD: Within 180 days after August 6, 1974 

(the effective date of AD 74–08–09, 

Amendment 39–1917 (39 FR 28229, August 

6, 1974)), or before the accumulation of any 

time in service on a new production aircraft, 

whichever occurs later—except that new 

production aircraft may be flown in 

accordance with sections 21.197 and 21.199 

of the Federal Aviation Regulations (14 CFR 

21.197 and 21.199) to a base where 

compliance may be accomplished: Install a 

self-contained, removable ashtray on or near 

the entry side of each lavatory door. One 

ashtray may serve more than one lavatory 

door if the ashtray can be seen readily from 

the cabin side of each lavatory door served. 

(j) Restatement of Requirements of AD 74– 

08–09 R2, Amendment 39–9680 (61 FR 

32318, June 24, 1996), with Revised 

Compliance Times: Allowances for Partial 

Replacement 

An airplane with multiple lavatory doors 

may be operated with up to 50 percent of the 

lavatory door ashtrays missing or inoperative, 

provided 50 percent of the missing or 

inoperative ashtrays are replaced within 3 

days and all remaining missing or 

inoperative ashtrays are replaced within 10 

days. An airplane with only 1 lavatory door 

may be operated for a period of 10 days with 

the lavatory door ashtray missing or 

inoperative. 

Note 1 to paragraph (j) of this AD: This AD 

permits a lavatory door ashtray to be missing, 

although the FAA-approved Master 

Minimum Equipment List (MMEL) may not 

allow such provision. In any case, the 

provisions of this AD prevail. 

(k) Restatement of Requirements of AD 74– 

08–09 R2, Amendment 39–9680 (61 FR 

32318, June 24, 1996): Inspections 

Within 30 days after August 6, 1974 (the 

effective date of AD 74–08–09, Amendment 


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Federal Register / Vol. 77, No. 35 / Wednesday, February 22, 2012 / Rules and Regulations 10355 

39–1917 (39 FR 28229, August 6, 1974)), and 

thereafter at intervals not to exceed 1,000 

hours’ time-in-service from the last 

inspections, accomplish the following: 

(1) Inspect all lavatory paper and linen 

waste receptacle enclosure access doors and 

disposal doors for proper operation, fit, 

sealing, and latching for the containment of 

possible trash fires. 

(2) Correct all defects found during the 

inspections required by paragraph (k)(1) of 

this AD. 

(l) Restatement of Requirements of AD 74– 

08–09 R2, Amendment 39–9680 (61 FR 

32318, June 24, 1996): Adjustments to 

Inspection Intervals 

Upon the request of an operator, the FAA 

Principal Maintenance Inspector (PMI) may 

adjust the 1,000-hour repetitive inspection 

interval specified in paragraph (k) of this AD 

to permit compliance at an established 

inspection period of the operator if the 

request contains data to justify the requested 

change in the inspection interval. 

(m) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Airframe/Cabin Safety 

Branch, Transport Airplane Directorate, 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. 

(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. 

(n) Related Information 

For more information about this AD, 

contact Alan Sinclair, Aerospace Engineer, 

Airframe/Cabin Safety Branch, ANM–115, 

Transport Airplane Directorate, FAA, 1601 

Lind Avenue SW., Renton, Washington 

98057–3356; phone: 425–227–2195; fax: 425– 

227–1232; email: alan.sinclair@faa.gov. 

(o) Material Incorporated by Reference 

None. 

Issued in Renton, Washington, on January 

27, 2012. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2012–3973 Filed 2–21–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0755; Directorate 

Identifier 2010–NE–12–AD; Amendment 39– 

16956; AD 2012–04–01] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

plc (RR) RB211–Trent 800 Series 

Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are superseding an 

existing airworthiness directive (AD) for 

all RR RB211–Trent 800 series turbofan 

engines. That AD currently requires 

removal from service of certain critical 

engine parts based on reduced life 

limits. This new AD reduces the life 

limits of additional critical engine parts. 

This AD was prompted by RR reducing 

the life limits of additional critical 

engine parts. We are issuing this AD to 

prevent the failure of critical rotating 

parts, which could result in 

uncontained failure of the engine and 

damage to the airplane. 

DATES: This AD is effective March 28, 

2012. 

ADDRESSES: For service information 

identified in this AD, contact RollsRoyce plc, Corporate Communications, 

P.O. Box 31, Derby, England, DE248BJ; 

phone: 011–44–1332–242424; fax: 011– 

44–1332–245418 or email from http:// 

www.rolls-royce.com/contact/ 

civil_team.jsp, or download the 

publication from https:// 

www.aeromanager.com. You may 

review copies of the referenced service 

information at the FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA. For 

information on the availability of this 

material at the FAA, call 781–238–7125. 

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 (phone: 800–647–5527) is 

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: 

Alan Strom, Aerospace Engineer, Engine 

Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7143; fax: 781–238– 

7199; email: alan.strom@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a supplemental notice of 

proposed rulemaking (SNPRM) to 

amend 14 CFR part 39 to supersede 

airworthiness directive (AD) 2003–16– 

18, amendment 39–13271 (68 FR 49344, 

August 18, 2003). That AD applies to 

the specified products. That SNPRM 

published in the Federal Register on 

November 7, 2011 (76 FR 68663). The 

original NPRM (75 FR 45560, August 3, 

2010) proposed to revise the Trent 800 

Time limits Manual (TLM) of the Trent 

800 engine maintenance manuals 

(EMMs). The SNPRM proposed to 

prohibit installation of one certain 

critical part and to increase the life of 

another critical part whose lives were 

previously reduced by that existing AD. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

received no comments on the SNPRM 

(76 FR 68663, November 7, 2011). 

Conclusion 

We reviewed the relevant data and 

determined that air safety and the 

public interest require adopting the AD 

as proposed. 

Costs of Compliance 

Based on the service information, we 

estimate that this AD affects about 16 

RB211–Trent 800 series turbofan 

engines of U.S. registry. The average 

labor rate is $85 per work-hour, but no 

labor cost is associated with this AD 

because discs are replaced at scheduled 

maintenance intervals. Prorated cost of 

parts cost about $45,000 per engine. 

Based on these figures, we estimate the 

cost of the AD on U.S. operators to be 

$720,000. 

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: 


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