Division Radio Communication and Navigation Equip - AD/RAD/91 Amdt 1 - Rockwell Collins TDR-94/94D Transponder - Air/Ground Discrete Inputs - Radio Communication and Navigation Equipment

Radio Communication and Navigation Equipment

AD/RAD/91 Amdt 1	Rockwell Collins TDR-94/94DTransponder - Air/Ground Discrete Inputs	8/2010

<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="3" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Rockwell Collins Mode S Transponders identified by type and Part Number (P/N) </span><span>in Table 1.</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="3" style="width:414.55pt; border-bottom:0.75pt solid #000000; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">Table 1</span></p></td></tr><tr style="height:8.75pt"><td rowspan="3" style="width:74.35pt; border-right:0.75pt solid #000000; padding-right:4.97pt; padding-left:5.35pt; vertical-align:top"><p><span></span></p></td><td style="width:93.9pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">Type</span></p></td><td colspan="2" style="width:309.95pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">P/N (all serial numbers)</span></p></td></tr><tr style="height:8.75pt"><td style="width:93.9pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p style="text-align:center"><span>TDR-94</span></p></td><td colspan="2" style="width:309.95pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>622-9352-004, 622-9352-005, 622-9352-006, 622-9352-007,</span><span> </span><span>622-9352-008, 622-9352-</span><span>108, 622-9352-207, 622-9352-308 a</span><span>nd 622-9352-408</span></p></td></tr><tr style="height:8.75pt"><td style="width:93.9pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p style="text-align:center"><span>TDR-94D</span></p></td><td colspan="2" style="width:309.95pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>622-9210-004, 622-9210-005, 622-9210-006, 622-9210-007,</span><span> </span><span>622-9210-008, 622-9210-108, 622-9210-207, 622-9210-308</span><span> </span><span>and 622-9210-408</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="3" style="width:414.55pt; border-top:0.75pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span>Note 1:</span><span> </span><span>These transponders are known to be installed on, but not limited to, the following a</span><span>ircraft </span><span>models</span><span>:</span></p></td></tr><tr><td style="width:74.35pt; border-right:0.75pt solid #000000; padding-right:4.97pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span></span></p></td><td colspan="2" style="width:157.7pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p class="Note" style="text-align:center"><span style="font-weight:bold">Manufacturer</span></p></td><td style="width:246.15pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p class="Note" style="text-align:center"><span style="font-weight:bold">Model</span></p></td></tr><tr><td style="width:74.35pt; border-right:0.75pt solid #000000; padding-right:4.97pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span></span></p></td><td colspan="2" style="width:157.7pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p class="Note"><span>Avions de Transport Régional</span></p></td><td style="width:246.15pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p class="Note"><span>ATR 42 and ATR 72, all models</span></p></td></tr><tr><td style="width:74.35pt; border-right:0.75pt solid #000000; padding-right:4.97pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span></span></p></td><td colspan="2" style="width:157.7pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p class="Note"><span>Bombardier (formerly Canadair)</span></p></td><td style="width:246.15pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p class="Note"><span>CL-600-1A11, CL-600-2A12 (601 Variant),</span><br><span>CL-600-2B16 (601-3A, 601-3R and 604 Variants), CL-600-2B19, CL-600-2C10, CL-600-2D15 and CL-600-2D24</span></p></td></tr><tr><td style="width:74.35pt; border-right:0.75pt solid #000000; padding-right:4.97pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span></span></p></td><td colspan="2" style="width:157.7pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p class="Note"><span>Bombardier (formerly </span><span>d</span><span>e Havilland </span><span>Canada</span><span>)</span></p></td><td style="width:246.15pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p class="Note"><span>DHC-8, all models</span></p></td></tr><tr><td style="width:74.35pt; border-right:0.75pt solid #000000; padding-right:4.97pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span></span></p></td><td colspan="2" style="width:157.7pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p class="Note"><span>Dassault Aviation</span></p></td><td style="width:246.15pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p class="Note"><span>Mystère-Falcon 50 (including EX variant), Mystère-Falcon 900, Falcon 900EX, Falcon 2000 and Falcon 2000EX</span></p></td></tr><tr><td style="width:74.35pt; border-right:0.75pt solid #000000; padding-right:4.97pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span></span></p></td><td colspan="2" style="width:157.7pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p class="Note"><span>Gulfstream</span></p></td><td style="width:246.15pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p class="Note"><span>G-IV</span></p></td></tr><tr style="height:0pt"><td style="width:85.05pt"></td><td style="width:104.6pt"></td><td style="width:63.8pt"></td><td style="width:256.85pt"></td></tr></tbody></table>

	Note 3: EASA AD 2010-0067 refers.
Compliance:	For Requirement 1 - Before 26 March 2011.
	For Requirement 2 - Within 12 months after the effective date of this Amendment.
	This Amendment becomes effective on 10 May 2010.
Background:	Airservices Australia, the Australian Air Navigation Service Provider (ANSP) together with other national ANSPs, have implemented Advanced Surface Movement Guidance & Control Systems (A-SMGCS) to improve the surveillance and control of on-ground aeroplanes and vehicles, providing conflict detection and alerting on runways.
	In order to ensure proper and effective operation of the A-SMGCS, transponder replies to Air Traffic Control Radar Beacon System (ATCRBS) and All-Call interrogations must be inhibited when the aeroplane is on ground.
	Rockwell Collins TDR-94 and TDR-94D Mode S Transponders have two Air/Ground Discrete inputs that may be connected to the aeroplane Weight-On-Wheels system. A connection to the Air/Ground #2 discrete will implement an inhibition of ATCRBS, ATCRBS/Mode-S All-Call and Mode-S Only All-Call replies when the aeroplane is on the ground. No on-ground reply inhibition occurs if the connection is to the Air/Ground #1 discrete.
	An aeroplane with this transponder interface problem, if not corrected, does not meet the specifications of International Civil Aviation Organisation (ICAO) Annex 10 to the Convention on International Civil Aviation Volume IV Amendment 77 Section 3.1.2.10.3.10 - Inhibition of replies which would lead to degradation of the functioning of the A-SMGCS, could affect the ATC functions in tower, approach and en-route sectors, increase the risk of undetected runway incursions and endangering the aeroplane, its occupants and persons on the ground.
	For these reasons, the original issue of this Directive required a check of the transponder Air/Ground discrete input connections and, in case of discrepancies, the accomplishment of corrective action.
	Since the original issue of this Directive was issued, the European Aviation Safety Agency (EASA) has advised that the Applicability of EASA AD 2009-0097 only referred to ‘aeroplanes’ in which the affected transponders could be installed, inadvertently implying that no helicopters could be affected. Some helicopters (eg Sikorsky S-92) are also known to be equipped with the affected transponders and it has been determined that the unsafe condition addressed by that AD can also occur during taxiing (weight-on-wheels) of helicopters.

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