SCHEDULE OF AIRWORTHINESS DIRECTIVES
CESSNA T310 · Service Bulletins
Overview
This document is a Schedule of Airworthiness Directives issued by the Civil Aviation Safety Authority of Australia, specifically addressing the KT 76A ATC Transponder. It outlines the applicability of the directive to various aircraft models, including the Cessna 310. The directive mandates the replacement of specific resistor network modules in the KT 76A transponders to prevent misleading altitude information from being transmitted to air traffic control. Compliance with this directive is required prior to installation in an aircraft, but no later than September 10, 1999. The document serves as a critical safety measure to ensure accurate altitude reporting from affected aircraft, thereby enhancing overall aviation safety.
- The directive applies to Cessna 310 and other aircraft models using KT 76A transponders.
- Transponders affected are part numbers 066-1062-00, -10, and -02 with serial numbers 93,000 to 109,999.
- Replacement of resistor network modules RM401 and RM402 is required.
- Compliance deadline is September 10, 1999.
- The directive addresses safety concerns regarding misleading altitude information from transponders.
Document
Source
Originally published by services.casa.gov.au. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Service Bulletins
- Year
- 1998
- Pages
- 1
- File size
- 12 KB
- Publisher
- services.casa.gov.au
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In this document
Applicability
The directive applies to AlliedSignal KT 76A Air Traffic Control transponders with specific part numbers and serial numbers. It is noted that these transponders are installed on various aircraft models, including the Cessna 310.
Requirement
The directive requires the replacement of two resistor network modules, RM401 and RM402, with new glass-coated parts as per the modification procedure outlined in the AlliedSignal Service Bulletin SB KT 76A-7 dated July 1996.
Compliance
Compliance with the directive must be achieved prior to the installation of the transponder in an aircraft, with a final deadline set for September 10, 1999.
Background
The FAA identified issues with KT 76A ATC transponders transmitting incorrect altitude information, which could lead to safety risks. This directive aims to rectify that issue and ensure accurate reporting.
Safety notes
- Failure to comply with the directive may result in inaccurate altitude reporting, posing safety risks.
Full document text
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Radio Communication and Navigation Equipment AD/RAD/63 KT 76A ATC Transponder 10/98 Applicability: AlliedSignal KT 76A Air Traffic Control (ATC) Transponders, part numbers 066- 1062-00, -10 and -02 with serial numbers 93,000 through 109,999 inclusive. Note: These transponders are known to be installed on, but not limited to, the following series of aircraft: Manufacturer Aircraft Series Cessna Aircraft Company 172, 182, T182, R182, 206, P206, U206, TP206, 210, T210, P210, 310, E310, T310 and 421 Twin Commander Aircraft Company 500, 520, 560, 680, 681, 685, 690, 695 and 720 The New Piper Aircraft Corporation (formerly known as Piper Aircraft Corporation) PA-31, PA-32 and PA-34 Raytheon Aircraft Corporation (formerly known as Beech Aircraft Corporation) E33, F33, G33, 35, J35, K35, L35, M35, P35, S35, V35, 36, A26, B36, D55, E55, 56, A56, 58, 58A, 95, B95, D95 and E95 Mooney Aircraft Corporation M20 McDonnell Douglas Helicopter Company 500N Requirement: Replace the two resistor network modules, RM401 and RM402, with new glass- coated parts in accordance with the ‘Modification Procedure’ section of AlliedSignal Service Bulletin SB KT 76A-7 dated July 1996. (When accomplished, this replacement is referred to as Mod 7.) Note: FAA AD 98-14-03 Amdt 39-10637 refers. Compliance: Prior to installation in an aircraft, but no later than 10 September 1999. This Airworthiness Directive becomes effective on 10 September 1998. Background: The FAA has advised that KT 76A ATC transponders have been identified as transmitting misleading encoding altimeter information to ground-based ATC radar sites and proximate Traffic Alert and Collision Avoidance System (TCAS) equipped aircraft. The actions specified by this directive are intended to prevent the transmission of misleading encoding altimeter information from affected aircraft.