Summary
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.
Directive Details
AD Number
FAA-2014-0326
Document Number
2014-21027
Type
Rule
Publication Date
September 9, 2014
Effective Date
October 14, 2014
Affected Manufacturer
Rockwell Collins, Inc. Transponders
Criticality
routine
Emergency
No
Docket ID
Docket No. FAA-2014-0326
Topics
Official Documents
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