DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2014-0527; Directorate Identifier 2014-NM-045-AD;
Amendment 39-18071; AD 2015-02-04]
RIN 2120-AA64

Airworthiness Directives; Dassault Aviation Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).

ACTION: Final rule.

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SUMMARY: We are adopting a new airworthiness directive (AD) for certain
Dassault Aviation Model MYSTERE-FALCON 50 airplanes. This AD was
prompted by a report of an untimely and intermittent indication of slat
activity due to chafing of the electrical wiring under the glare shield
and behind the flight deck front panel. This AD requires installing two
protective plates between the electrical wiring under the glare shield
and the engine fire pull handles. We are issuing this AD to prevent
chafing of the electrical wiring, which could result in a short circuit and
generation of smoke in the cockpit, potential loss of several functions
essential for safe flight, and consequent reduced controllability of the airplane.

DATES: This AD becomes effective March 6, 2015.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of March 6,
2015.

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov/#!docketDetail;D=FAA-2014-0527 or in person at
the Docket 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.
For service information identified in this AD, contact Dassault
Falcon Jet, P.O. Box 2000, South Hackensack, NJ 07606; telephone 201-
440-6700; Internet http://www.dassaultfalcon.com. You may view this
referenced service information at the FAA, Transport Airplane
Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the
availability of this material at the FAA, call 425-227-1221.

FOR FURTHER INFORMATION CONTACT: Tom Rodriguez, Aerospace Engineer,
International Branch, ANM 116, Transport Airplane Directorate, FAA,
1601 Lind Avenue SW., Renton, WA 98057-3356; telephone 425-227-1137;
fax 425-227-1149.

SUPPLEMENTARY INFORMATION:

Discussion

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would apply to certain Dassault Aviation
Model MYSTERE-FALCON 50 airplanes. The NPRM published in the Federal
Register on August 12, 2014 (79 FR 47031).
The European Aviation Safety Agency (EASA), which is the Technical
Agent for the Member States of the European Union, has issued EASA
Airworthiness Directive 2014-0024, dated January 23, 2014 (referred to
after this as the Mandatory Continuing Airworthiness Information, or
``the MCAI''), to correct an unsafe condition on certain Dassault
Aviation Model MYSTERE-FALCON 50 airplanes. The MCAI states:

One operator experienced an untimely and intermittent indication
of slat activity on his aeroplane. The results of the subsequent
investigation revealed that electrical wiring under the glare shield
and behind the flight deck front panel was chafing with hardware and
was short-circuited to ground. This situation may have resulted from
an incorrect installation of the wiring during a previous
maintenance action in the area. A design review identified a lack of
protection of the affected electrical wiring bundle, which would
have prevented damage caused by chafing with aeroplane structural
parts.
This condition, if not corrected, might lead to an electrical
short circuit and generation of smoke, possibly affecting operation
of systems and resulting in reduced control of the aeroplane.
To address this potential unsafe condition, Dassault Aviation
issued [service bulletin] SB F50-530, providing instructions for
installation of a protective plate on the electrical wiring.
For the reasons described above, this [EASA] AD requires
modification of the aeroplane by installing a protective plate on
the electrical wiring.

You may examine the MCAI in the AD docket on the Internet at http://www.regulations.gov/#!documentDetail;D=FAA-2014-0527-0002.

Comments

We gave the public the opportunity to participate in developing
this AD. We received no comments on the NPRM (79 FR 47031, August 12,
2014) or on the determination of the cost to the public.

Conclusion

We reviewed the relevant data and determined that air safety and
the public interest require adopting this AD as proposed, with minor
editorial changes. We have determined that these minor changes:
Are consistent with the intent that was proposed in the
NPRM (79 FR 47031, August 12, 2014) for correcting the unsafe
condition; and
Do not add any additional burden upon the public than was
already proposed in the NPRM (79 FR 47031, August 12, 2014).

Related Service Information

We reviewed Dassault Service Bulletin F50-530, dated November 12,
2013. The service information describes procedures for installing two
protective plates between the electrical wiring under the glare shield
and the engine fire pull handles. You can find this information at
http://www.regulations.gov by searching for and locating Docket No.
FAA-2014-0527.

Costs of Compliance

We estimate that this AD affects 250 airplanes of U.S. registry.
We estimate the following costs to comply with this AD:

Estimated Costs

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 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 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.

Examining the AD Docket

You may examine the AD docket on the Internet at http://www.regulations.gov/#!docketDetail;D=FAA-2014-0527; 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 street address for the Docket Operations office (telephone 800-647-
5527) is in the ADDRESSES section.

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.

Sec. 39.13 [Amended]

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