AD 2014-18-01 Airworthiness Directives; Rockwell Collins, Inc. Transponders

Models named: ATR 42, 2000, 525, 525A, 525B, 560, 560XL. Read the applicability below — it usually turns on serial or part numbers too.

(1) This AD applies to the following Rockwell Collins, Inc. part number (P/N) Mode S transponders that are known to be installed on but not limited to the airplanes listed in paragraphs (c)(2)(i) through (c)(2)(xiv) of this AD, except for those airplanes listed in paragraphs (c)(3)(i) through (c)(3)(vi) of this AD, that have been modified in-production or in-service: (i) TDR-94: CPN 622-9352-008, 622-9352-108, 622-9352-308, 622-9352-408; and (ii) TDR-94D: CPN 622-9210-008, 622-9210-108, 622-9210-308, 622-9210-408. (2) The products listed in paragraphs (c)(1)(i) and (c)(1)(ii) of this AD may be installed on but not limited to the following airplanes featuring weight-on wheels input to the transponder, certificated in any category: (i) ATR42 and ATR72; (ii) Bombardier (Canadair) CL-600-2B16 (604 Variant); (iii) Bombardier CL-600-2B19 (RJ100 and RJ200); (iv) Cessna 525, serial numbers (S/N) 525-0600 through 525-0684 (CJ1); (v) Cessna 525A, S/N 525A-0300 through 525A-0438 (CJ2); (vi) Cessna 525B, S/N 525B-0001 through 525B-0293 (CJ3); (vii) Cessna 560, S/N 560-0751 through 560-0802 (Citation Encore); (viii) Cessna 560XL, S/N 560-6001 and subsequent; (ix) Dassault Aviation Mystere-Falcon 50; (x) Dassault Aviation Mystere-Falcon 900; (xi) Dassault Aviation Falcon 2000; (xii) Dassault Aviation Falcon 2000EX; (xiii) Piaggio Aero Industries P.180 (Avanti and Avanti II); and (xiv) SAAB 2000. (3) This AD action does not apply to the excepted airplane models, identified in paragraphs (c)(3)(i) through (c)(3)(vi) of this AD, that have been modified in-production or in-service. They do not have the unsafe condition described in this AD. (i) Dassault airplanes that have been modified in-service or in-production following the applicable Dassault Aviation service information as listed in table 1 of paragraph (c)(3)(i) of this AD. Table 1 of Paragraph (c)(3)(i) of This AD: Excepted Dassault Airplanes Airplane models Service bulletin Modification(s) Mystere-Falcon 50 F50-457 M2966 and M2968 Mystere-Falcon 900 F900-354 M3896 Falcon 900EX F900EX-239 M3896 Falcon 2000 F2000-312 M2624 and M2632 Falcon 2000EX F2000EX-043 M2624 (ii) Model ATR 42 airplanes or ATR 72 airplanes that had P/N 622-9210-108 transponders installed in production using ATR modification 05614 or installed in-service using ATR Service Bulletin ATR42-34-0167 or ATR Service Bulletin ATR72-34-1094, as applicable. (iii) SAAB Model 2000 airplanes that had P/N 622-9210-008 transponders installed in production using SAAB modifications 6231, 6243, and 6249 or installed in-service using SAAB Service Bulletins 2000-34-066, 2000-34-072, and 2000-34-076. (iv) Bombardier Aerospace (Canadair) airplanes Model CL-600-2B16 (604 Variant) that had P/N 622-9210-008 transponders installed and incorporated the corrective actions recommended in the Bombardier Advisory Wire AW 604-34-0078 using the instructions in Bombardier Aerospace Service Bulletin 604-34-054 (drawing 604-70482 Engineering Order, Revison D-1) or using a service request for product support. Bombardier Aerospace (Canadair) airplanes Model CL-600-2B19 (RJ100 and RJ200) that had P/N 622-9210-008 transponders installed in production using Bombardier Aerospace Modification TC601R16789 or in service using Bombardier Aerospace Service Bulletin 601R-34-142 (Modification TC601R16790). (v) Cessna Aircraft Company Models 525, 525A, and 525B airplanes that had P/N 622-9352-008 transponders installed in production using Cessna Engineering Change Records (ECRs) 55298, 58654, and 59567; and Model 525B airplanes that had P/N 622-9352-008 transponders installed in service using Cessna Aircraft Company Service Bulletin SB525B-34-03 or SB525B-34-08. Cessna Aircraft Company Models 525, 525A, 525B, 560, and 560XL airplanes that had P/N 622-9210-008 transponders installed in production using Cessna ECRs 55298, 58654, 59567, 56135, and 58032; and Model 525B airplanes that had P/N 622-9210-008 transponders installed in service using Cessna Service Bulletin SB525B-34-03 or SB525B-34-08. (vi) Piaggio Aero Industries Model P.180 (Avanti) airplanes that had P/N 622-9210-008 transponders installed in production using Piaggio modification 80-0773 or in service using Piaggio Service Bulletin SB-80-0227. Piaggio Aero Industries Model P.180 (Avanti II) airplanes that had P/N 622-9210-008 transponders installed in production using Piaggio modification 80-0588 and 80-0598.

Comply with this AD within the compliance times specified, unless already done.

Within the next 2 years after October 14, 2014 (the effective date of this AD), inspect the airplane type code category strapping setting for a value of zero (0) or one (1) following Rockwell Collins, Inc. Service Information Letter 07-2, 523-0810069-101000, TDR-94() SIL 07-02, Revision 1, dated September 2, 2008. If the airplane type code category strapping is set to a value of zero (0) or one (1), no further action is required by this AD.

This AD was prompted by instances where the TDR-94 and TDR-94D Mode S transponders did not properly respond to Mode S Only All-Call interrogations when the airplane transitioned from a ground to airborne state. We are issuing this AD to detect and correct Mode S transponders that do not respond correctly to Mode S Only All-Call interrogations, which could result in increased pilot and air traffic controller workload as well as reduced separation of airplanes.

None.