Division Flight Management Systems - AD/FMS/3 Amdt 1 - Honeywell NZ-2000 and IC-800 Navigation Computers - Flight Management Systems

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AD/FMS/3 Amdt 1	Honeywell NZ-2000 and IC-800Navigation Computers	6/2009

<table cellspacing="0" cellpadding="0" style="width:510.3pt; margin-top:0pt; margin-bottom:0pt; border-collapse:collapse"><tbody><tr><td style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Applicability:</span></p></td><td colspan="2" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Honeywell NZ-2000 navigation computers and Honeywell IC-800 or IC-800E integrated avionics computers.</span></p></td></tr><tr><td style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span></span></p></td><td colspan="2" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span>Note 1:</span><span> </span><span>These computers are known to be installed on, but not limited to, the following Transport Category aeroplanes:</span></p></td></tr><tr><td style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span></span></p></td><td style="width:201.9pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span style="font-weight:bold">Manufacturer</span><br><br><span>Bombardier, Inc</span><br><br><span>Dassault Aviation</span><br><span>Gulfstream Aerospace Corporation</span><br><span>Lockheed</span><br><span>Hawker Beechcraft (formerly Raytheon Aircraft Company)</span></p></td><td style="width:201.95pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span style="font-weight:bold">Model</span><br><br><span>CL-600-2B16 (CL-601-3A, CL-601-3R and CL-604)</span><br><span>Mystère</span><span>-Falcon 900</span><br><span>G-1159A, G-IV and GV</span><br><span>382G series</span><br><span>BAe.125 Series 800A (including C-29A and U-125)</span></p></td></tr><tr><td style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Requirement:</span></p></td><td colspan="2" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="margin-left:21.3pt; text-indent:-21.3pt"><span>1.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>If not previously accomplished in accordance with the original issue of this Directive, determine if the installed NZ-2000 navigation computers and IC-800 or IC-800E integrated avionics computers serving flight management systems (FMS) have computer part numbers and software modification levels identified in Honeywell Technical Newsletter (TN) A23-6111-008, Revision 001, dated</span><br><span>22 February 2007.</span></p></td></tr><tr><td style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span></span></p></td><td colspan="2" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span>Note 2:</span><span> </span><span>For purposes of this Directive, aeroplanes with FMS computers having a part number and software modification level identified in the newsletter are "affected aeroplanes.''</span></p></td></tr><tr><td style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span></span></p></td><td colspan="2" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="margin-left:21.3pt; text-indent:-21.3pt"><span>2.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>For any affected aeroplane, revise the Limitations Section of the applicable Aircraft Flight Manual (AFM) to incorporate the information included in Appendix A of TN A23-6111-008, Revision 001.</span><span> </span><span>This may be accomplished by inserting a copy of Appendix A of the newsletter into the AFM.</span></p></td></tr><tr><td style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span></span></p></td><td colspan="2" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="margin-left:21.3pt; text-indent:-21.3pt"><span>3.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>Upgrade the applicable software as specified in Table 1.</span></p></td></tr></tbody></table>

Background:	The FAA has received reports of in-flight unannunciated shifts of computed position in aeroplanes with Honeywell NZ-2000 navigation and IC-800 integrated avionics computers serving Honeywell FMSs. The computed position shift, attributed to a software design error induced during a previous software modification, occurs when the number of inertial reference units (IRUs) supplying data to the FMS degrades from 3 to 2 or from 2 to 1, or increases from 2 to 3 or from 1 to 2.
	If the FMS system is coupled to an autopilot or flight director system, this shift in the FMS computed position could result in uncommanded deviations from the intended flight path of the aeroplane and, if those deviations are undetected by the flight crew, compromise terrain and/or traffic avoidance.
	The original issue of this Directive required affected units to be identified and, if necessary, introduced a temporary revision to the AFM Limitations Section. This was considered an interim action, as the manufacturer was developing a modification that would address the unsafe condition.
	This Amendment continues the Requirements of the original issue of the Directive and introduces a terminating action which allows the removal of the AFM temporary revision. The Amendment also adds the IC-800E IAC to the applicability and removes Hawker 800XP and 1000 from the list of possible affected aeroplanes.
	The original issue of this Directive became effective on18 April 2007.

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