AD 2017-24-01

We are adopting a new airworthiness directive (AD) for certain ATR--GIE Avions de Transport R[eacute]gional Model ATR42-500 airplanes and Model ATR72-212A airplanes. This AD requires an inspection for routing attachments of electrical harness bundles and for wire damage, and corrective actions if necessary. This AD was prompted by reports of electrical harness bundle chafing with a window blinding panel in the fuselage due to missing routing attachments. We are issuing this AD to address the unsafe condition on these products.

Final rule; request for comments.

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):

2017-24-01 ATR--GIE Avions de Transport R[eacute]gional: Amendment 39-19105; Docket No. FAA-2017-1027; Product Identifier 2017-NM-092- AD.

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(a) Effective Date

This AD becomes effective December 11, 2017.

(b) Affected ADs

None.

(c) Applicability

This AD applies to the ATR--GIE Avions de Transport R[eacute]gional airplanes identified in paragraphs (c)(1) and (c)(2) of this AD, certificated in any category.
(1) Model ATR42-500 airplanes, serial numbers (S/Ns) 1014, 1016 through 1019 inclusive, and 1201 through1212 inclusive.
(2) Model ATR72-212A airplanes, S/Ns 1165 through 1200 inclusive, 1220 through 1340 inclusive, 1342 through 1353 inclusive, 1355 through 1366 inclusive, 1368 through 1376 inclusive, 1378 through 1380 inclusive, 1382, 1385, and 1388.

(d) Subject

Air Transport Association (ATA) of America Code 92, Electrical System Installation.

(e) Reason

This AD was prompted by reports of electrical harness bundle chafing with a window blinding panel in the fuselage. We are issuing this AD to detect and correct missing routing attachments of fuselage electrical harness bundles, which could result in wire failure (cut or shorted) and, in case of several failures in combination, the loss of systems, possibly resulting in reduced control of the airplane.

(f) Compliance

Comply with this AD within the compliance times specified, unless already done.

(g) Inspection

Within 6 months or 500 flight hours after the effective date of this AD, whichever occurs first: Do a detailed inspection for missing brackets and damage (including but not limited to chafing and electrical shorting) to wire bundles of the Route 1M and Route 2M electrical harness, in accordance with the Accomplishment Instructions of ATR Service Bulletin ATR42-92-0033, dated May 3, 2017 (for Model ATR42-500 airplanes); or ATR Service Bulletin ATR72- 92-1044, dated May 3, 2017 (for Model ATR72-212A airplanes); as applicable.

(h) Corrective Action

If the inspection required by paragraph (g) of this AD reveals that any bracket is missing or any wire is damaged: Before further flight, do applicable corrective actions, in accordance with the Accomplishment Instructions of ATR Service Bulletin ATR42-92-0033, dated May 3, 2017 (for Model ATR42-500 airplanes); or ATR Service Bulletin ATR72-92-1044, dated May 3, 2017 (for Model ATR72-212A airplanes); as applicable. Where ATR Service Bulletin ATR42-92-0033, dated May 3, 2017; or ATR Service Bulletin ATR72-92-1044,dated May 3, 2017; specifies to contact ATR--GIE Avions de Transport R[eacute]gional for appropriate action: Before further flight, accomplish corrective actions in accordance with the procedures specified in paragraph (i)(2) of this AD.

(i) Other FAA AD Provisions

The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, International Section, Transport Standards Branch, 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 International Branch, send it to the attention of the person identified in paragraph (j)(2) of this AD. Information may be emailed to: 9-ANM-116-AMOC-REQUESTS@faa.gov. Before using any approved AMOC, notify your appropriate principal inspector, or lacking aprincipal inspector, the manager of the local flight standards district office/certificate holding district office.
(2) Contacting the Manufacturer: For any requirement in this AD to obtain corrective actions from a manufacturer, the action must be accomplished using a method approved by the Manager, International Section, Transport Standards Branch, FAA; or the European Aviation Safety Agency (EASA); or ATR--GIE Avions de Transport R[eacute]gional's EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature.

(j) Related Information

(1) Refer to Mandatory Continuing Airworthiness Information (MCAI) EASA AD 2017-0118, dated July 7, 2017, for related information. You may examine the MCAI on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA- 2017-1027.
(2) For more information about this AD, contact Shahram Daneshmandi, Aerospace Engineer, International Section, Transport Standards Branch, FAA, 1601 Lind Avenue SW., Renton, WA 98057-3356; telephone 425-227-1112; fax 425-227-1149.

(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 this AD specifies otherwise.
(i) ATR Service Bulletin ATR42-92-0033, dated May 3, 2017.
(ii) ATR Service Bulletin ATR72-92-1044, dated May 3, 2017.
(3) For service information identified in this AD, contact ATR-- GIE Avions de Transport R[eacute]gional, 1, All[eacute]e Pierre Nadot, 31712 Blagnac Cedex, France; telephone +33 (0) 5 62 21 62 21; fax +33 (0) 5 62 21 67 18; email aircraft.com">continued.airworthiness@atr-aircraft.com.
(4) You may view this service information at the FAA, Transport Standards Branch, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425-227-1221.
(5) You may 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://www.archives.gov/federal-register/cfr/ibr-locations.html.

Discussion

The European Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Union, has issued EASA Airworthiness Directive 2017-0118, dated July 7, 2017 (referred to after this as the Mandatory Continuing Airworthiness Information, or ``the MCAI''), to correct an unsafe condition for certain ATR--GIE Avions de Transport R[eacute]gional Model ATR42-500 airplanes and Model ATR72-212A airplanes. The MCAI states:

An event was reported of several spurious alarms on a recently delivered ATR 72 aeroplane. During troubleshooting, damage was evidenced on the electrical harness bundle (Route 1M) due to chafing with a window blinding panel located on the left hand of the fuselage, zone 231. A bracket, necessary to maintain the harness bundle close to the structure of the fuselage and avoid chafing, was missing.
Same bracket has also been found missing on the other side of the fuselage (symmetrical location, Right Hand side, zone 232, route 2M) with no damage on the harness bundle.
A quality investigation revealed another aeroplane on the production line, where same brackets were not installed.
This condition, if not detected and corrected, may lead to wire failure (cut or shorted) and, in case of several failures in

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combination, the loss of systems, possibly resulting in reduced control of the aeroplane.
To address this potential unsafe condition, ATR published Service Bulletin (SB) ATR 42-92-0033 and SB ATR 72-92-1044 to provide instructions to verify the installation of the brackets and to inspect the wire bundles [for damage e.g., but not limited to, chafing and electrical shorting].
For the reasons described above, this [EASA] AD requires a one- time [detailed] inspection of the routing attachments [for missing attachments and wire damage] and, depending on findings, installation of the brackets and, as necessary, wire repair.

You may examine the MCAI on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2017- 1027.

Related Service Information Under 1 CFR Part 51

ATR has issued Service Bulletin ATR42-92-0033, dated May 3, 2017, for Model ATR42 airplanes; and Service Bulletin ATR72-92-1044, dated May 3, 2017, for Model ATR72 airplanes. This service information describes procedures for doing an inspection of routing attachments of electrical harness bundles and for wire damage, and corrective actions if necessary. This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section.

FAA's Determination and Requirements of This AD

This product has been approved by the aviation authority of another country, and is approved for operation in the United States. Pursuant to our bilateral agreement with the State of Design Authority, we have been notified of the unsafe condition described in the MCAI and service information referenced above. We are issuing this AD because we evaluated all pertinent information and determined the unsafe condition exists and is likely to exist or develop on other products of the same type designs.

FAA's Determination of the Effective Date

There are currently no domestic operators of this product. Therefore, we find good cause that notice and opportunity for prior public comment are unnecessary. In addition, for the reason(s) stated above, we find that good cause exists for making this amendment effective in less than 30 days.

Comments Invited

This AD is a final rule that involves requirements affecting flight safety, and we did not precede it by notice and opportunity for public comment. We invite you to send any written relevant data, views, or arguments about this AD. Send your comments to an address listed under the ADDRESSES section. Include ``Docket No. FAA-2017-1027; Product Identifier 2017-NM-092-AD'' at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this AD. We will consider all comments received by the closing date and may amend this AD based on 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 AD.

Costs of Compliance

Currently, there are no affected U.S.-registered airplanes. If an affected airplane is imported and placed on the U.S. Register in the future, we provide the following cost estimates to comply with this AD. We estimate that it will take about 3 work-hours per product to comply with the basic requirements of this AD. The average labor rate is $85 per work-hour. Required parts will cost about $0 per product. Based on these figures, we estimate thecost of this AD on U.S. operators to be $0, or $255 per product.
In addition, we estimate that any necessary follow-on actions will take about 1 work-hour and require parts costing $6, for a cost of $91 per product. We have no way of determining the number of aircraft that might need these actions.

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. Thisregulation 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.
This AD is issued in accordance with authority delegated by the Executive Director, Aircraft Certification Service, as authorized by FAA Order 8000.51C. In accordance with that order, issuance of ADs is normally a function of the Compliance and Airworthiness Division, but during this transition period, the Executive Director has delegated the authority to issue ADs applicable to transport category airplanes to the Director of the System Oversight Division.

Regulatory Findings

We 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 thereasons 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 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.