AD 2012-23-07

We are adopting a new airworthiness directive (AD) for all Eurocopter Deutschland GmbH (ECD) Model EC135 helicopters, except the EC 135 P2+ and T2+. This AD requires inspecting each upper and lower plain journal bearing (bearing) and replacing the swashplate assembly with an airworthy swashplate assembly if a bearing is not correctly positioned. This AD was prompted by two reports of the bearings moving in relation to the main rotor swashplate sliding sleeve (sliding sleeve). The actions of this AD are intended to detect shifting of the bearing, which could limit the movement of the collective control and result in subsequent loss of control of the helicopter.

Final rule.

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 adding the following new airworthiness directive (AD):

2012-23-07 Eurocopter Deutschland GmbH Helicopters: Amendment 39- 17263; Docket No. FAA-2012-0500; Directorate Identifier 2010-SW-014- AD.

(a) Applicability

This AD applies to all Eurocopter Deutschland GmbH (ECD) Model EC135 helicopters, except EC 135 P2+ and EC135 T2+, with a swashplate assembly, part number (P/N) L623M2006101, installed, certificated in any category.

(b) Unsafe Condition

This AD defines the unsafe condition as movement of the plain journal bearings to the outside of the main rotor swashplate sliding sleeve (slidingsleeve). This condition could limit movement of the collective and result in subsequent loss of control of the helicopter.

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(c) Effective Date

This AD becomes effective January 11, 2013.

(d) 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.

(e) Required Actions

Within 5 hours time-in-service (TIS), and thereafter at intervals not to exceed 5 hours TIS:
(1) Visually inspect the position of the upper plain journal bearing and determine if it is flush with the sliding sleeve.

Note to paragraph (e)(1) of this AD: Figure 1 of Eurocopter Alert Service Bulletin EC135-62A-021, dated June 23, 2005, which is not incorporated by reference, contains additional information about the inspection.

(2) Visually inspect the lower plain journal bearing and determine if it is recessed 2 millimeters from the slidingsleeve.
(3) If the upper plain journal bearing is not flush with the sliding sleeve or the lower plain journal bearing is not recessed 2 mm, before further flight, replace the swashplate assembly with an airworthy swashplate assembly.
(4) Replacing the swashplate assembly, P/N L623M2006101, with a later designed swashplate assembly, P/N L623M2005103, constitutes a terminating action for the requirements of this AD.

(f) Alternative Methods of Compliance (AMOCs)

(1) The Manager, Safety Management Group, FAA, may approve AMOCs for this AD. Send your proposal to: Gary Roach, Aviation Safety Engineer, FAA, Rotorcraft Directorate, Regulations and Policy Group, 2601 Meacham Blvd., Fort Worth, Texas 76137, telephone (817) 222- 5110, email gary.b.roach@faa.gov.
(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 thelocal flight standards district office or certificate holding district office, before operating any aircraft complying with this AD through an AMOC.

(g) Additional Information

(1) Eurocopter Alert Service Bulletin EC135-62A-021, dated June 23, 2005, which is not incorporated by reference, contains additional information about the subject of this AD. For service information identified in this AD, contact American Eurocopter Corporation, 2701 Forum Drive, Grand Prairie, TX 75053-4005, telephone (800) 232-0323, fax (972) 641-3710, or at http://www.eurocopter.com. You may review a copy of the service information at the FAA, Office of the Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas 76137.
(2) The subject of this AD is addressed in European Aviation Safety Agency AD 2009-0272, dated December 18, 2009.

(h) Subject

Joint Aircraft Service Component (JASC) Code: 6230: Main Rotor Mast/Swashplate.

Discussion

On May 11, 2012, at 77 FR 27661, the Federal Register published our notice of proposed rulemaking (NPRM), which proposed to amend 14 CFR part 39 to include an AD that would apply to all Eurocopter Deutschland GmbH (ECD) model EC135 helicopters, except the EC 135 P2+ and T2+. That NPRM proposed to require repetitively inspecting the

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bearings and replacing the swashplate assembly if a bearing is not correctly positioned. The NPRM also provided that replacing the swashplate assembly terminated the proposed inspection requirements. The proposed requirements were intended to detect shifting of a bearing, which could limit the movement of the collective control and result in loss of control of the helicopter.
The European Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Union, has issued AD No. 2009-0272, dated December 18, 2009 (AD 2009-0272), to correct an unsafe condition for Eurocopter Model EC 135 and EC 635 helicopters. EASA advises that during two separate pre-flight checks on Model EC 135 helicopters in 2005, it was detected that one of the bearings of the sliding sleeve had moved to the outside of the sliding sleeve. EASA states that this condition, if not detected and corrected, could lead to a complete shift of the bearing to the inside or outside, creating the possibility of a limited movement of the collective, which could result in reduced control of the helicopter.

Comments

We gave the public the opportunity to participate in developing this AD, but we received no comments on the NPRM (77 FR 27661, May 11, 2012).

FAA's Determination

These helicopters have been approved by the aviation authority of Germany and are approved for operation in the United States. Pursuant to our bilateral agreement with Germany, EASA, its technical representative, has notified us of the unsafe condition described in the EASA AD. We areissuing 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 these same type designs and that air safety and the public interest require adopting the AD requirements as proposed.

Differences Between This AD and the EASA AD

This AD differs from the EASA AD as follows:
This AD requires the visual inspection to be performed by a mechanic, and repeated every 5 hours TIS. The EASA AD allows the visual inspection to be accomplished by a pilot during a preflight inspection.
This AD does not require contacting ECD customer service for corrective actions.
This AD provides terminating action for the inspection requirements for the bearings by replacing the swashplate assembly with a later-design swashplate assembly, part number L623M2005103.
The EASA AD applies to ECD model EC635 aircraft, and this AD does not because the EC635 does not have an FAA issued type- certificate.

Related Service Information

We reviewed Eurocopter Alert Service Bulletin (ASB) EC135-62A-021, dated June 23, 2005 (EC135-62A-021). EC135-62A-021 describes procedures for visually checking the bearings of the sliding sleeve during preflight. EASA classified this ASB as mandatory and issued AD 2009- 0272 to ensure the continued airworthiness of these helicopters.

Costs of Compliance

We estimate that this AD will affect 218 helicopters of U.S. registry and that operators will incur the following costs to comply with this AD:
Inspecting the bearings requires about 15 minutes at an average labor rate of $85 per hour, for a cost per helicopter of about $22 and a total cost to the U.S. operator fleet of $4,796 per inspection cycle.
If required, replacing the swashplate assembly will take about 8 work hours at an average labor rate of $85 per hour, and required parts will cost about $38,586, for a total cost per helicopter of $39,266.

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 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 directeffect 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.