[Federal Register Volume 78, Number 186 (Wednesday, September 25, 2013)]
[Rules and Regulations]
[Pages 58868-58872]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2013-23017]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2013-0146; Directorate Identifier 2012-SW-060-AD; 
Amendment 39-17559; AD 2013-16-21]
RIN 2120-AA64


Airworthiness Directives; Agusta S.p.A. (Type Certificate 
Currently Held by Agusta Westland S.p.A) (Agusta) Helicopters

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: We are superseding an airworthiness directive (AD) for Agusta 
Model A109E helicopters that required reducing the tail rotor (T/R) 
blade life limit, modifying a T/R hub and grip assembly, re-identifying 
two T/R assemblies, clarifying the never-exceed speed (Vne) limitation, 
and reducing the inspection interval. Since we issued that AD, the 
manufacturer has redesigned a T/R grip bushing (bushing) that reduces 
the loads, which caused the T/R cracking, on the T/R blades. This 
action requires installing the new bushing and re-identifying the T/R 
hub-and-grip and hub-and-blade assemblies and requires a recurring 
inspection of each bushing. These actions are intended to prevent 
fatigue failure of a T/R blade and subsequent loss of control of the 
helicopter.

DATES: This AD is effective October 30, 2013.
    The Director of the Federal Register approved the incorporation by 
reference of a certain document listed in this AD as of October 30, 
2013.

ADDRESSES: For service information identified in this AD, contact 
Agusta

[[Page 58869]]

Westland, Customer Support & Services, Via Per Tornavento 15, 21019 
Somma Lombardo (VA) Italy, ATTN: Giovanni Cecchelli; telephone 39-0331-
711133; fax 39-0331-711180; or at http://www.agustawestland.com/technical-bullettins. You may review the referenced service information 
at the FAA, Office of the Regional Counsel, Southwest Region, 2601 
Meacham Blvd., Room 663, Fort Worth, Texas 76137.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://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 AD, the foreign authority's AD, 
any incorporated-by-reference service information, the economic 
evaluation, any comments received, and other information. The street 
address for the Docket Operations Office (phone: 800-647-5527) is U.S. 
Department of Transportation, Docket Operations Office, M-30, West 
Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., 
Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Sharon Miles, Aviation Safety 
Engineer, Regulations and Policy Group, Rotorcraft Directorate, FAA, 
2601 Meacham Blvd., Fort Worth, TX 76137; telephone (817) 222-5110; 
email [email protected].

SUPPLEMENTARY INFORMATION: 

Discussion

    On February 25, 2013, at 78 FR 12651, the Federal Register 
published our notice of proposed rulemaking (NPRM), which proposed to 
amend 14 CFR part 39 to supersede AD 2002-25-51, Amendment 39-13060 (68 
FR 9504, February 28, 2003), which required for Agusta Model A109E 
helicopters reducing the tail rotor (T/R) blade life limit, modifying a 
T/R hub and grip assembly, re-identifying two T/R assemblies, 
clarifying the never-exceed speed (Vne) limitation, and reducing the 
inspection interval.
    The NPRM was prompted by AD No. 2007-0010, dated January 31, 2007, 
issued by the European Aviation Safety Agency (EASA), which is the 
Technical Agent for the Member States of the European Union. EASA 
issued EASA AD No. 2007-0010 to correct an unsafe condition for the 
Agusta Model A109E. EASA advises that Agusta has designed a new bushing 
that when installed on the T/R grip assembly reduces the loads acting 
upon the T/R blades. EASA further advises that following installation 
of the re-designed bushing, the inspection interval of the T/R blade 
bushing may be extended from 150 flight hours to 200 flight hours. 
Accordingly, the NPRM proposed to require:
     Before each start of the helicopter engines, visually 
checking both sides of each T/R blade for a crack. An owner/operator 
(pilot) may perform this check and must enter compliance into the 
aircraft records in accordance with 14 CFR 43.9 (a)(1)-(4) and 14 CFR 
91.417(a)(2)(v). A pilot may perform this check because it involves 
only a visual check for a crack and can be performed equally well by a 
pilot or a mechanic. This procedure is an exception to our standard 
maintenance regulations.
     For helicopters with T/R hub and blade assembly, part 
number (P/N) 109-8131-02-151, before further flight, modifying each T/R 
hub and blade assembly by installing a new bushing in each grip 
assembly and two zero-hours time-in-service (TIS) T/R blades; and re-
identifying the hub and grip assembly and the T/R hub and blade 
assembly with different P/Ns.
     For helicopters with T/R hub and blade assembly, P/N 109-
8131-02-157, within 25 hours TIS and thereafter at intervals not to 
exceed 25 hours TIS, and before further flight any time there is an 
increase in vibration levels, using a 5x or higher power magnifying 
glass, visually inspecting each T/R blade for a crack.
     On or before accumulating 200 hours TIS on the T/R hub and 
grip assembly, and thereafter at intervals not to exceed 200 hours TIS, 
inspecting the linings and measuring the internal diameter of the 
bushings. If the internal diameter of the bushing exceeds 41.35 
millimeters, replacing the bushing.
     If there is a crack, before further flight, replacing the 
T/R blade.
     Revising the Airworthiness Limitations section of the 
maintenance manual to reflect that a T/R blade, P/N 109-8132-01-111, 
which has not been operated as part of T/R hub and blade assembly, P/N 
109-8131-02-151, has a retirement life of 1,000 hours TIS.

Comments

    We gave the public the opportunity to participate in developing 
this AD, but we did not receive any comments on the NPRM (78 FR 12651, 
February 25, 2013).

FAA's Determination

    These helicopters have been approved by the aviation authority of 
Italy and are approved for operation in the United States. Pursuant to 
our bilateral agreement with Italy, EASA, its technical representative, 
has notified us of the unsafe condition described in the EASA AD. We 
are issuing this AD because we evaluated all information provided by 
EASA and determined the unsafe condition exists and is likely to exist 
or develop on other helicopters of the same type design and that air 
safety and the public interest require adopting the AD requirements as 
proposed.

Related Service Information

    We reviewed Alert Bollettino Tecnico No. 109EP-30, Revision C, 
dated September 29, 2006, which describes procedures for checking/
inspecting for cracks on both the upper and lower surfaces of T/R 
blades, P/N 109-8132-01-111; replacing each bushing, P/N 109-0132-55 
and spacer P/N 109-0132-13, with bushing, P/N 109-8131-30-109, and 
instituting a recurring inspection of each bushing; and cancelling the 
VNE limitations when the newly-designed bushing is installed 
on each T/R grip assembly, P/N 109-8131-29-101, a ``new'' pair of T/R 
blades, P/N 109-8132-01-111, is installed, and the T/R hub-and-grip and 
hub-and-blade assemblies are re-identified.

Costs of Compliance

    We estimate that this AD will affect 75 helicopters of U.S. 
Registry. Based on an average labor rate of $85 per hour, we estimate 
that operators will incur the following costs in order to comply with 
this AD:
     Visually inspecting the T/R blades requires about 0.5 work 
hours for a cost per helicopter of $43 and a total cost to U.S. 
operators of $3,225 per inspection cycle.
     Replacing a cracked T/R blade requires about 2 work hours, 
and required parts cost about $25,320, for a total cost per helicopter 
of $25,490.
     Modifying the hub assembly with new T/R blades and 
bushings requires about 16 work hours, and required parts would cost 
about $58,690, for a total cost per helicopter of $60,050.
     Inspecting the T/R bushings requires about 7 work hours, 
for a cost per helicopter of $595 and a total cost to U.S. operators of 
$44,625 per inspection cycle.
     Revising the Airworthiness Limitations section of the 
maintenance manual requires about .25 work hour, for a cost per 
helicopter of $22 and a total cost to U.S. operators of $1,650.

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

[[Page 58870]]

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 helicopters identified in this 
rulemaking action.

Regulatory Findings

    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 to the extent 
that it justifies making a regulatory distinction; 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.
    We prepared an economic evaluation of the estimated costs to comply 
with this AD and placed it in the AD docket.

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

0
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]

0
2. The FAA amends Sec.  39.13 by removing Airworthiness Directive (AD) 
2002-25-51, Amendment 39-13060 (68 FR 9504, February 28, 2003), and 
adding the following new AD:

2013-16-21 AGUSTA S.p.A. (Agusta): Amendment 39-17559; Docket No. 
FAA-2013-0146; Directorate Identifier 2012-SW-060-AD.

(a) Applicability

    This AD applies to Agusta Model 109E helicopters with tail rotor 
(T/R) hub and blade assembly, part number (P/N) 109-8131-02-151 and 
P/N 109-8131-02-157, certificated in any category.

(b) Unsafe Condition

    This AD defines the unsafe condition as a fatigue crack in a T/R 
blade. This condition could result in failure of the T/R blade and 
subsequent loss of control of the helicopter.

(c) Affected ADs

    This AD supersedes AD 2002-25-51, Docket No. 2002-SW-55-AD, 
Amendment 39-13060 (68 FR 9504, February 28, 2003).

(d) Effective Date

    This AD becomes effective October 30, 2013.

(e) Compliance

    You are responsible for performing each action required by this 
AD within the specified compliance time unless it has already been 
accomplished prior to that time.

(f) Required Actions

    (1) Before each start of the helicopter engines, visually check 
both sides of each T/R blade for a crack in the inspection area 
depicted in Figure 1 to paragraph (f)(1) of this AD. This action may 
be performed by the owner/operator (pilot) holding at least a 
private pilot certificate, and must be entered into the aircraft 
records showing compliance with this AD in accordance with 14 CFR 
43.9 (a)(1)-(4) and 14 CFR 91.417(a)(2)(v). The record must be 
maintained as required by 14 CFR 91.417, 121.380, or 135.439.

[[Page 58871]]

[GRAPHIC] [TIFF OMITTED] TR25SE13.000

    (2) For helicopters with T/R hub and blade assembly, P/N 109-
8131-02-151 (consisting of two T/R blades, P/N 109-8132-01-111, and 
one T/R hub and grip assembly, P/N 109-8131-02-127), before further 
flight, modify each T/R hub and blade assembly by installing a new 
bushing, P/N 109-8131-30-109, in each grip assembly and two zero-
hour time-in-service (TIS) T/R blades, P/N 109-8132-01-111; re-
identifying the hub and grip assembly as P/N 109-8131-02-159; and 
re-identifying the T/R hub and blade assembly as P/N 109-8131-02-157 
in accordance with the Compliance Instructions, Part V, paragraphs 
2. through 13., of Agusta Bollettino Tecnico No. 109EP-30, Revision 
C, dated September 29, 2006 (BT). A T/R blade, P/N 109-8132-01-111, 
which has been operated as part of T/R hub and blade assembly, P/N 
109-8131-02-151, must be retired regardless of TIS and may not be 
used as part of the T/R hub and blade assembly, P/N 109-8131-02-157. 
Returning the removed T/R blades, grips, or bushings to Agusta is 
not required.
    (3) For helicopters with T/R hub and blade assembly, P/N 109-
8131-02-157 (consisting of two T/R blades, P/N 109-8132-01-111, and 
one T/R hub and grip assembly, P/N 109-8131-02-159), within 25 hours 
TIS, and thereafter at intervals not to exceed 25 hours TIS, and 
before further flight any time there is an increase in vibration 
levels, using a 5x or higher power magnifying glass, visually 
inspect each T/R blade for a crack in accordance with the Compliance 
Instructions, Part III, paragraphs 1. through 5. of the BT. 
Reporting to Agusta is not required.
    (4) On or before accumulating 200 hours TIS on the T/R hub and 
grip assembly, P/N 109-8131-02-159, and thereafter at intervals not 
to exceed 200 hours TIS, inspect the linings and measure the 
internal diameter of the bushings, P/N 109-8131-30-109, by referring 
to Figure 2 of the BT. If the internal diameter of the bushing 
exceeds 41.35 millimeters, replace the bushing.
    (5) If there is a crack in a T/R blade, before further flight, 
replace the cracked T/R blade.
    (6) Revise the Airworthiness Limitations section of the 
maintenance manual to reflect that a T/R blade, P/N 109-8132-01-111, 
which has not been operated as part of T/R hub and blade assembly, 
P/N 109-8131-02-151, has retirement life of 1,000 hours TIS.

(g) Special Flight Permits

    Special flight permits will not be issued.

(h) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Safety Management Group, FAA, may approve AMOCs 
for this AD. Send your proposal to: Sharon Miles, Aviation Safety 
Engineer, Regulations and Policy Group, Rotorcraft Directorate, FAA, 
2601 Meacham Blvd., Fort Worth, Texas, 76137; telephone (817) 222-
5110; email [email protected].
    (2) For operations conducted under a 14 CFR part 119 operating 
certificate or under 14 CFR part 91, subpart K, we suggest that you 
notify your principal inspector, or lacking a principal inspector, 
the manager of the local flight standards district office or 
certificate holding district office, before operating any aircraft 
complying with this AD through an AMOC.

(i) Additional Information

    The subject of this AD is addressed in European Aviation Safety 
Agency (EASA) AD No. 2007-0010, dated January 31, 2007. You may view 
a copy of the EASA AD on the Internet at http://www.regulations.gov 
in Docket No. FAA-2013-0146.

(j) Subject

    Joint Aircraft Service Component (JASC) Code: 6410, Tail Rotor 
Blades.

(k) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (i) Agusta Bollettino Tecnico No. 109EP-30, Revision C, dated 
September 29, 2006, excluding Figure 1.
    (ii) Reserved.
    (3) For Agusta service information identified in this AD, 
contact Agusta Westland, Customer Support & Services, Via Per 
Tornavento 15, 21019 Somma Lombardo (VA) Italy, ATTN: Giovanni 
Cecchelli; telephone 39-0331-711133; fax 39-0331-711180; or at 
http://www.agustawestland.com/technical-bullettins.
    (4) You may view this service information at FAA, Office of the 
Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, 
Fort Worth, Texas 76137. For information on the availability of this 
material at the FAA, call (817) 222-5110.
    (5) You may also view this service information that is 
incorporated by reference at the National Archives and Records 
Administration (NARA). For information on the availability of this 
material at NARA, call (202) 741-6030, or go to: http://

[[Page 58872]]

www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Fort Worth, Texas, on August 2, 2013.
Lance T. Gant,
Acting Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 2013-23017 Filed 9-24-13; 8:45 am]
BILLING CODE 4910-13-P