1AD/RAD/58 Amdt 1 - AlliedSignal CAS-81 TCAS II

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Radio Communication and Navigation Equipment

AD/RAD/58

Amdt 1

AlliedSignal CAS-81 TCAS II 7/98

Applicability: AlliedSignal Commercial Avionics Systems CAS-81 Traffic Alert and Collision Avoidance Systems (TCAS), with serial numbers below 6066.

Note: CAS-81 TCAS II equipments are known to be installed on, but not limited to, the following aircraft series:

Aerospatiale ATR-42, ATR-72

Airbus Industries A300, A310, A320, A321, A330 and A340 Beech 1900 and BE-65 through BE-90

Boeing 727, 737, 747, 757, 767 and 777

Convair CV-580

de Havilland DHC-7 and DHC-8

Embraer EMB-120

Fairchild F227

Fokker F28 Mk 100, Mk 1000 and Mk 4000

General Dynamics Convair 340 and 440 Gulfstream G-159 and G-IV

Lockheed L1011

McDonnell Douglas DC-8, DC-9, DC-10, MD-11 and MD-80 Rockwell International NA-265-65

SAAB 340

Shorts 360

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Requirement: Amend the Limitations Section of the Aircraft Flight Manual to include the following:

“In order to ensure that the audio output of the CAS-81 TCAS operates properly, accomplish the following:

Prior to the first flight of the day; prior to the accumulation of 10 hours of uninterrupted power; and at the mid-point of any one flight scheduled to exceed 10 hours: Cycle the power to the TCAS Processor via the circuit breaker or power bus.

b. Prior to taxi before take-off: Initiate the TCAS functional test in accordance with the procedures in the Aircraft Flight Manual to verify the operational condition of the CAS-81 TCAS.”

Alternately,

If the aircraft manufacturer has substantiated 30ºC as a maximum ambient for the TCAS processor location amend the Limitations Section of the Aircraft Flight Manual to include the following:

“In order to ensure that the audio output of the CAS-81 TCAS operates properly, accomplish the following:

Prior to each flight of up to 18 hours duration, reset the TCAS circuit breaker and conduct a TCAS self-test.”

Note 1: Applications for an amendment to the Aircraft Flight Manual should be made to the local CASA District Airworthiness Office.

Note 2: Tests may be performed by a flight crew member.

Note 3: Modification of the TAP-81A TCAS processor receiver in accordance with AlliedSignal Service Bulletin TPA-81A-34-82 dated January 1996 or TPA-81A-34-84 dated January 1996 is considered an optional terminating action for the requirement of this Directive. Following incorporation of the modifications the Flight Manual amendment may be removed (see Note 1).