Airworthiness Directives; Rolls-Royce Corporation AE 3007A1/1, AE 3007A1/3, AE 3007A1, AE 3007A1E, AE 3007A1P, AE 3007A3, AE 3007C, and AE 3007C1 Turbofan Engines, 30017-30018 [E9-14812]

Agencies

• Federal Aviation Administration
• DEPARTMENT OF TRANSPORTATION

[Federal Register Volume 74, Number 120 (Wednesday, June 24, 2009)]
[Proposed Rules]
[Pages 30017-30018]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E9-14812]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2009-0246; Directorate Identifier 2009-NE-04-AD]
RIN 2120-AA64


Airworthiness Directives; Rolls-Royce Corporation AE 3007A1/1, AE 
3007A1/3, AE 3007A1, AE 3007A1E, AE 3007A1P, AE 3007A3, AE 3007C, and 
AE 3007C1 Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for Rolls-Royce Corporation (RRC) AE 3007A1/1, AE 3007A1/3, AE 3007A1, 
AE 3007A1E, AE 3007A1P, AE 3007A3, AE 3007C, and AE 3007C1 turbofan 
engines with a fan spinner part number (P/N) 23070964 or P/N 23078783, 
installed. This proposed AD would require replacement of the fan 
spinner. This proposed AD results from a report of a fan spinner 
releasing from an AE 3007A turbofan engine, during flight. We are 
proposing this AD to prevent the fan spinner from releasing, which 
could result in injury, damage to the engine, and damage to the 
airplane.

DATES: We must receive any comments on this proposed AD by August 24, 
2009.

ADDRESSES: Use one of the following addresses to comment on this 
proposed AD.
     Federal eRulemaking Portal: Go to https://www.regulations.gov and follow the instructions for sending your 
comments electronically.
     Mail: Docket Management Facility, U.S. Department of 
Transportation, 1200 New Jersey Avenue, SE., West Building Ground 
Floor, Room W12-140, Washington, DC 20590-0001.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
     Fax: (202) 493-2251.
    Contact Rolls-Royce Corporation, P.O. Box 420, Indianapolis, IN 
46206; telephone (317) 230-3774; fax (317) 230-8084; e-mail: 
royce.com">indy.pubs.services@rolls-royce.com, for a copy of the service 
information identified in this proposed AD.

FOR FURTHER INFORMATION CONTACT: Michael Downs, Aerospace Engineer, 
Chicago Aircraft Certification Office, FAA, Small Airplane Directorate, 
2300 East Devon Avenue, Des Plaines, IL 60018; e-mail: 
michael.downs@faa.gov; telephone: (847) 294-7870; fax: (847) 294-7834.

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite you to send us any written relevant data, views, or 
arguments regarding this proposal. Send your comments to an address 
listed under ADDRESSES. Include ``Docket No. FAA-2009-0246; Directorate 
Identifier 2009-NE-04-AD'' in the subject line of your comments. We 
specifically invite comments on the overall regulatory, economic, 
environmental, and energy aspects of the proposed AD. We will consider 
all comments received by the closing date and may amend the proposed AD 
in light of those comments.
    We will post all comments we receive, without change, to https://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact 
with FAA personnel concerning this proposed AD. Using the search 
function of the Web site, anyone can find and read the comments in any 
of our dockets, including, if provided, the name of the individual who 
sent the comment (or signed the comment on behalf of an association, 
business, labor union, etc.). You may review the DOT's complete Privacy 
Act Statement in the Federal Register published on April 11, 2000 (65 
FR 19477-78).

Examining the AD Docket

    You may examine the AD docket on the Internet at https://www.regulations.gov; or in person at the Docket Operations office 
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 Operations office (telephone (800) 647-5527) is 
the same as the Mail address provided in the ADDRESSES section. 
Comments will be available in the AD docket shortly after receipt.

Discussion

    We received a report of a fan spinner releasing from an AE 3007A 
turbofan engine, during flight. After observing noise and vibration, 
the flight crew shut down the No. 1 engine and made an uneventful 
landing. Inspection of the No. 1 engine revealed a missing fan spinner 
and damage to the fan blades. Also noted was debris penetration through 
the forward engine cowl in three locations, and through the airplane 
outer skin in two locations. At the time of inspection, the No. 1 
engine had accumulated 11,682 operating hours time-since-new, and 8,535 
cycles-in-service-since-new. RRC then performed spin pit testing of the 
affected design fan spinner, and found a high stress concentration in 
the 12 bolt hole windows of the fan spinner. This stress concentration 
can potentially develop into low-cycle-fatigue cracks. This condition, 
if not corrected, could result in the fan spinner releasing, which 
could result in injury, damage to the engine, and damage to the 
airplane.

FAA's Determination and Requirements of the Proposed AD

    We have evaluated all pertinent information and identified an 
unsafe condition that is likely to exist or develop on other products 
of this same type design. We are proposing this AD, which would require 
replacement of the fan spinner, P/N 23070964 or P/N 23078783.

Costs of Compliance

    We estimate that this proposed AD would affect 1,600 RRC AE 3007A 
series and AE 3007C series turbofan engines installed on airplanes of 
U.S. registry. We also estimate that it would take about one work-hour 
per engine to perform the proposed actions, and that the average labor 
rate is $80 per work-

[[Page 30018]]

hour. Required parts would cost about $12,943 per engine. Based on 
these figures, we estimate the total cost of the proposed AD to U.S. 
operators to be $20,836,800.

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 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 that the proposed AD:
    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); and
    3. Would 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 proposed AD. You may get a copy of this summary at the 
address listed under ADDRESSES.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

The Proposed Amendment

    Under the authority delegated to me by the Administrator, the 
Federal Aviation Administration 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.


Sec.  39.13  [Amended]

    2. The FAA amends Sec.  39.13 by adding the following new 
airworthiness directive:

Rolls-Royce Corporation (formerly Allison Engine Company): Docket 
No. FAA-2009-0246; Directorate Identifier 2009-NE-04-AD.

Comments Due Date

    (a) The Federal Aviation Administration (FAA) must receive 
comments on this airworthiness directive (AD) action by August 24, 
2009.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Rolls-Royce Corporation (RRC) AE 3007A1/
1, AE 3007A1/3, AE 3007A1, AE 3007A1E, AE 3007A1P, AE 3007A3, AE 
3007C, and AE 3007C1 turbofan engines with a fan spinner part number 
(P/N) 23070964 or P/N 23078783, installed. These engines are 
installed on, but not limited to, Embraer EMB-135, EMB-145, and 
Cessna Citation X airplanes.

Unsafe Condition

    (d) This AD results from a report of a fan spinner releasing 
from an AE 3007A turbofan engine during flight. We are issuing this 
AD to prevent the fan spinner from releasing, which could result in 
injury, damage to the engine, and damage to the airplane.

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.

Replacement of the Fan Spinner

    (f) For RRC AE 3007A1/1, AE 3007A1/3, AE 3007A1, AE 3007A1E, AE 
3007A1P, and AE 3007A3 turbofan engines, remove fan spinner P/N 
23070964 or P/N 23078783 at the next shop visit, but no later than 
1,500 additional cycles-in-service (CIS) after the effective date of 
this AD.
    (g) For RRC AE 3007C and AE 3007C1 turbofan engines, remove fan 
spinner P/N 23070964 or P/N 23078783 at the next shop visit, but no 
later than 1,500 additional CIS after the effective date of this AD.

Fan Spinner Installation Prohibition

    (h) After the effective date of this AD, do not install any fan 
spinner P/N 23070964 or P/N 23078783 on any Rolls Royce Corporation 
engine.

Definition

    (i) For the purpose of this AD, a shop visit is induction of the 
engine into the engine maintenance shop for any cause.

Alternative Methods of Compliance

    (j) The Manager, Chicago Aircraft Certification Office, has the 
authority to approve alternative methods of compliance for this AD 
if requested using the procedures found in 14 CFR 39.19.

Related Information

    (k) Contact Michael Downs, Aerospace Engineer, Chicago Aircraft 
Certification Office, FAA, Small Airplane Directorate, 2300 East 
Devon Avenue, Des Plaines, IL 60018; e-mail: michael.downs@faa.gov; 
telephone: (847) 294-7870; fax: (847) 294-7834, for more information 
about this AD.
    (l) Rolls-Royce Corporation Service Bulletin (SB) No. AE 3007A-
72-361, dated June 26, 2008, and SB No. AE 3007C-72-285, dated June 
26, 2008, pertain to the subject of this AD. Contact Rolls-Royce 
Corporation, P.O. Box 420, Indianapolis, IN 46206; telephone (317) 
230-3774; fax (317) 230-8084; e-mail: royce.com">indy.pubs.services@rolls-royce.com, for a copy of this service information.

    Issued in Burlington, Massachusetts, on June 17, 2009.
Carlos Pestana,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. E9-14812 Filed 6-23-09; 8:45 am]
BILLING CODE 4910-13-P