Airworthiness Directives; Rockwell Collins, Inc. Transponders
airworthiness · Rule · Final rule. · Published 2014-09-09 · Effective 2014-10-14 · 79 FR 53288
Document
Document number
2014-21027
Federal Register citation
79 FR 53288
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2014-09-09
Effective date
2014-10-14
FAA docket
Docket No. FAA-2014-0326
Abstract
We are adopting a new airworthiness directive (AD) for certain Rockwell Collins TDR-94 and TDR-94D Mode select (S) transponders that are installed on airplanes. 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. This AD requires inspecting the setting of the airplane type code category strapping and requires either modifying the airplane type code category setting or installing the software upgrade to convert the affected transponders to the new part number. We are issuing this AD to correct the unsafe condition on these products.