(a) EFFECTIVE DATE

    This AD is effective October 27, 2017.

(b) AFFECTED ADS

    This AD replaces AD 2016-17-02 Amendment 39-18615 (81 FR 55366, August
    19, 2016) ("AD 2016-17-02").

(c) APPLICABILITY

    This AD applies to the Dassault Aviation airplanes identified in para-
    graphs (c)(1) and (c)(2) of this AD, certificated in any category.

(1) Model  FALCON 900EX airplanes,  serial numbers  (S/Ns) 270 through 291
    inclusive and 294.

(2) Model  FALCON 2000EX airplanes,  S/Ns 263 through 305  inclusive,  307
    through 313 inclusive, 315, 320, and 701 through 734 inclusive.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 30,  Ice and Rain Pro-
    tection.

(e) REASON

    This AD  was prompted  by a  design review  of in-production airplanes
    that identified a deficiency in certain wing anti-ice system  ducting.
    We are issuing this AD to detect and correct a deficiency in the  wing
    anti-ice system ducting, which could result in reduced performance  of
    the wing anti-ice system  with potential ice accretion  and ingestion,
    and  could  result  in degraded  engine  power  and degraded  handling
    characteristics.

(f) COMPLIANCE

    Comply with this AD within the compliance times specified,  unless al-
    ready done.

(g) RETAINED REVISION TO THE AIRPLANE FLIGHT MANUAL (AFM), WITH NO CHANGES

    This paragraph restates the requirements of  paragraph (g) of AD 2016-
    17-02, with no changes.

(1) For  Model FALCON 900EX airplanes  on  which  the actions specified in
    Dassault Service Bulletin F900EX-464 have not been accomplished: With-
    in 10 flight cycles  after September 6, 2016 (the effective date of AD
    2016-17-02), revise Section 4-200-05A, "OPERATION IN ICING CONDITIONS"
    of  the  Model Falcon 900EX AFM to include the information in figure 1
    to paragraph (g)(1) of this AD,  and  thereafter operate  the airplane
    accordingly.  The AFM revision may be done by inserting a copy of this
    AD into the AFM.

    FIGURE 1 TO PARAGRAPH (G)(1) OF THIS AD –OPERATION IN ICING CONDITIONS
    ______________________________________________________________________
                        WINGS ANTI-ICE SYSTEM OPERATION

    During in-flight operation of a wings anti-ice system (WINGS ANTI-ICE)
    maintain the N1 of all engines equal to  or  more than  the values de-
    fined in Table 1, as applicable to atmospheric condition.

                                   Table 1

    New Minimum N1 values required  during  in-flight operation of a wings
    anti-ice system

                            Three operative engines:
    ______________________________________________________________________
    TAT                – 30 to        – 20 to         – 10 to      0 to
                       – 20 °C        – 10 °C         0 °C         + 10 °C
    ______________________________________________________________________
    Above 20,000 ft      79%            75%           71%          66%
    ______________________________________________________________________
    From 20,000 ft to    76%            73%           66%          59%
    10,000 ft
    ______________________________________________________________________
    Below 10,000 ft      68%            66%           61%          58%
    ______________________________________________________________________

    These new values include 3% increase compared to former values (4-200-
    05A page 1/2).

                             Two operative engines:
    ______________________________________________________________________
    TAT                – 30 to        – 20 to         – 10 to      0 to
                       – 20 °C        – 10 °C         0 °C         + 10 °C
    ______________________________________________________________________
    Above 20,000 ft      86%            82%           78%          73%
    ______________________________________________________________________
    From 20,000 ft to    83%            80%           73%          66%
    10,000 ft
    ______________________________________________________________________
    Below 10,000 ft      75%            73%           68%          65%
    ______________________________________________________________________

    These new values include 3% increase compared to former values (4-200-
    05A page 1/2).

    TAT – Total Air Temperature

    Note 1: Maintaining  the  N1  above the  minimum anti-ice  N1  on  all
    engines may lead  to exceedance of  approach speed. Early  approach or
    landing configuration of an  airplane and/or application of  airbrakes
    may be used to control the airspeed. In approach and landing and for a
    limited duration up to three minutes, selection of N1 speeds below the
    minimum anti-ice N1 speed is authorized. In this case it is  necessary
    to disengage the autothrottle.

    Effectivity: F900EX (LX variant) S/N 270 to 291,  294 without Dassault
    Aviation SB F900EX-464.
    ______________________________________________________________________

(2) For  Model FALCON 2000EX airplanes  on  which the actions specified in
    Dassault Service Bulletin F2000EX-393 have not been accomplished: With
    -in 10 flight cycles after September 6, 2016 (the effective date of AD
    2016-17-02), revise Section 4-200-05A, "OPERATION IN ICING CONDITIONS"
    of the Model Falcon 2000EX AFM to include the information  in figure 2
    to paragraph (g)(2) of this AD,  and  thereafter  operate the airplane
    accordingly.  The AFM revision may be done by inserting a copy of this
    AD into the AFM.

    FIGURE 2 TO PARAGRAPH (G)(2) OF THIS AD –OPERATION IN ICING CONDITIONS
    ______________________________________________________________________
                        WING ANTI ICE SYSTEM OPERATION

    During  in-flight  operation of a wing anti-ice system (WING ANTI-ICE)
    maintain the N1 of both engines equal to  or  more than the values de-
    fined in Table 1, as applicable to atmospheric condition.

                                   Table 1

    New Minimum N1 values required during in-flight operation  of  a  wing
    anti-ice system

                      Two engines operative minimum N1:
    ______________________________________________________________________
               TAT     - 30 °C        - 15 °C         0 °C         + 10 °C
    Z
    ______________________________________________________________________
    31,000 ft            74.6           67.6          52.8         52.8
    ______________________________________________________________________
    22,000 ft            72.4           63.7          52.8         52.1
    ______________________________________________________________________
    3,000 ft             57.3           54.9          49.4         48.8
    ______________________________________________________________________
    0 ft                 54.9           54.9          49.4         48.8
    ______________________________________________________________________

    These new values include 2% increase compared to former values (4-200-
    05A page 1/2).

           One engine operative or one bleed inoperative minimum N1:
    ______________________________________________________________________
               TAT     - 30 °C        - 15 °C         0 °C         + 10 °C
    Z
    ______________________________________________________________________
    31,000 ft            82.4           77.0          64.0         58.0
    ______________________________________________________________________
    22,000 ft            79.2           72.0          59.8         56.6
    ______________________________________________________________________
    3,000 ft             71.2           66.4          59.8         49.3
    ______________________________________________________________________
    0 ft                 64.2           63.7          59.8         49.3
    ______________________________________________________________________

    These new values include 2% increase compared to former values (4-200-
    05A page 1/2).

    TAT – Total Air Temperature
    Z - Altitude

    Note 1: Maintaining  the  N1  above the  minimum anti-ice  N1  on  all
    engines may lead  to exceedance of  approach speed. Early  approach or
    landing configuration of an aeroplane and/or application of  airbrakes
    may be used to control the airspeed. In approach and landing and for a
    limited duration up to three minutes, selection of N1 speeds below the
    minimum anti-ice N1 speed is authorized.  In this case it is necessary
    to disengage the autothrottle.

    Effectivity: F2000EX (LX/S variants) S/N 263 to 305,  307 to 313, 315,
    320, 701 to 734 without Dassault Aviation SB F2000EX-393.
    ______________________________________________________________________

(h) NEW ACTIONS: INSPECTION, PART REPLACEMENT, PART RE-IDENTIFICATION

    Within 9 months after the effective date of this AD: Do a detailed in-
    spection of the wing anti-ice system ducting (anti-ice pipes) for  the
    presence of a  diaphragm, and do  all applicable actions  specified in
    paragraph  (h)(1)  or  (h)(2)  of  this  AD,  in  accordance  with the
    Accomplishment Instructions of  Dassault Service Bulletin  F900EX-464,
    dated June 20, 2016;  or Service Bulletin F2000EX-393,  dated June 20,
    2016;  as  applicable.  After  the  applicable  actions  specified  in
    paragraph (h)(1)  or (h)(2)  of this  AD have  been completed, the AFM
    revision required by paragraph (g) of this AD may be removed from  the
    AFM for that airplane.

(1) If  during  the  inspection required by the introductory text to para-
    graph (h) of this AD it is determined that a diaphragm is present: Be-
    fore further flight, replace the wing anti-ice system ducting.

(2) If  during  the  inspection required by the introductory text to para-
    graph (h) of this AD it is determined that a diaphragm is not present:
    Before further flight, do a check of the anti-ice pipe part number and
    re-identify the wing anti-ice system ducting.

(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  International
    Section,  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 a principal 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 Dassault Aviation’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)
    Emergency AD 2016-0130-E, dated July 5, 2016, for related information.
    This MCAI may be found in the AD docket on the Internet at http://www.
    regulations.gov by searching for and locating Docket No. FAA-2017-0494

(2) For more information about this AD,  contact Tom Rodriguez,  Aerospace
    Engineer, International Section, Transport Standards Branch, FAA, 1601
    Lind Avenue SW.,  Renton, WA 98057-3356;  telephone 425-227-1137;  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) Dassault Aviation Service Bulletin F900EX-464, dated June 20, 2016.

(ii) Dassault Aviation Service Bulletin F2000EX-393, dated June 20, 2016.

(3) For service information identified in this AD, contact Dassault Falcon
    Jet Corporation,  Teterboro Airport,  P.O. Box 2000, South Hackensack,
    NJ 07606; telephone 201-440-6700;  Internet http://www.dassaultfalcon.
    com.

(4) You may view this service information at the FAA,  Transport Standards
    Branch, 1601 Lind Avenue SW, Renton, WA. For information on the avail-
    ability 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.

Issued  in  Renton, Washington,  on  September 7, 2017.  Jeffrey E. Duven,
Director, System Oversight Division, Aircraft Certification Service.

FOR FURTHER INFORMATION CONTACT: Tom Rodriguez, Aerospace Engineer, Inter-
national Section,  Transport Standards Branch,  FAA, 1601 Lind Avenue SW.,
Renton, WA 98057-3356; telephone 425-227-1137; fax 425-227-1149.