Airworthiness directives › 2012-02-08
AD 2012-02-08 Airworthiness Directives; Aviation Communication & Surveillance Systems (ACSS) Traffic Alert and Collision Avoidance System (TCAS) Units
Applicability*9
This AD applies to Aviation Communication & Surveillance Systems (ACSS) traffic alert and collision avoidance system (TCAS) units with part numbers identified in ACSS Technical Newsletter 8008359, Revision B, dated August 3, 2011, as installed on but not limited to various transport and small airplanes, certificated in any category. Note 1 to paragraph (c) of this AD: Table 1 of this AD also provides a cross-referenced list of part numbers with associated service bulletins to help operators identify affected parts. Table 1—Service Bulletin and LRU Cross-Reference ACCS Product— Affected LRU Part Numbers (P/Ns)— ACSS Service Bulletin— TCAS 3000SP 9003500-10900, -10901, -10902, -55900, -55901, -55902, -57901, -65900, -65901, -65902 8008221-001, Revision 01, dated February 4, 2011 (ATA Service Bulletin 9003500-34-6014). TCAS 3000SP 9003500-10001, -10002, -10003, -10004, -55001, -55002, -55003, -55004, -65001, -65002, -65003, -65004 8008222-001, Revision 01, dated February 4, 2011 (ATA Service Bulletin 9003500-34-6015). TCAS 3000SP 9003500-10802 8008223-001, Revision 01, dated February 4, 2011 (ATA Service Bulletin 9003500-34-6016). TCAS 2000 7517900-10003, -10004, -10006, -10007, -10011, -55003, -55004, -55006, -55007, -55009, -55011, -71003, -71004, -71006, -71007, -71011 8008229-001, Revision 02, dated June 28, 2011 (ATA Service Bulletin 7517900-34-6040). TCAS II 4066010-910, -912 8008230-001, Revision 02, dated June 28, 2011 (ATA Service Bulletin 4066010-34-6036). Military TCAS 2000 7517900-56101, -56102, -56104, -56105, 56107 8008231-001, Revision 02, dated June 28, 2011 (ATA Service Bulletin 7517900-34-6041). T2CAS 9000000-10002, -10003, -10004, -10005, -10006, -10008, -10204, -10205, -10206, -10208, -20002, -20003, -20004, -20005, -20006, -20008, -20204, -20205, -20206, -20208, -55002, -55003, -55004, -55005, -55006, -55008, -55204, -55205, -55206, -55208 8008233-001, Revision 03, dated June 30, 2011 (ATA Service Bulletin 9000000-34-6016). T2CAS 9000000-10110, -11111 8008234-001, Revision 02, dated June 30, 2011 (ATA Service Bulletin 9000000-34-6017). TCAS 3000 9003000-10001, -10002, -10003, -55001, -55002, -55003, -65001, -65002, -65003 8008235-001, Revision 02, dated February 3, 2011 (ATA Service Bulletin 9003000-34-6006). Military TCAS 2000 MASS 7517900-20001, -20002, -65001, -65002 8008236-001, Revision 03, dated June 30, 2011 (ATA Service Bulletin 7517900-34-6042). Military T2CAS MASS 9000000-30006, -40006, -60006 8008238-001, Revision 02, dated June 30, 2011 (ATA Service Bulletin 9000000-34-6018).
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 36 months after the effective date of this AD, upgrade software for the ACSS TCAS, in accordance with the Accomplishment Instructions of the applicable ACSS publication identified in table 1 of this AD. Note 2 to paragraph (g) of this AD: ACSS Service Bulletin 8008233-001 (ATA Service Bulletin 9000000-34-6016), Revision 03, dated June 30, 2011, contains three part numbers (P/Ns 9000000-10007, -20007, and -55007) that were never produced.
Unsafe condition
This AD was prompted by reports of anomalies with TCAS units during a flight test over a high density airport. The TCAS units dropped several reduced surveillance aircraft tracks because of interference limiting. We are issuing this AD to prevent TCAS units from dropping tracks, which could compromise separation of air traffic and lead to subsequent mid-air collisions.
Affected ADs
None.
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