S 864-152
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P7 Overhead Circuit Breaker Panel
1) 7A10, ADC L PWR
2) 7A12, AOA L
3) 7A13, AOA ALTN L
4) 7A14, ADC R PWR
5) 7A16, AOA R
6) 7A17, AOA ALTN R
7) 7J15, ADC C PWR
S 014-011
(3)
Open the main power distribution panels P6-3 and P6-4.
S 024-003
(4)
Remove the ADC transformer:
(a)
Identify the wires for the installation.
(b)
Remove the wires from the transformer.
(c)
Remove the adapter plate.
(d)
Hold the transformer and remove the screws.
TASK 34-12-07-404-132
3. ADC Transformer Installation____________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AIPC 34-12-01, Fig. 61
B. Access
(1) Location Zone
222 Control Cabin, RH
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C. Procedure
S 864-251
(1)
Make sure the two F/D switches on the MCP are in the OFF position.
S 864-191
(2)
Make sure these circuit breakers are open:
(a) P7 Overhead Circuit Breaker Panel
1) 7A10, ADC L PWR
2) 7A12, AOA L
3) 7A13, AOA ALTN L
4) 7A14, ADC R PWR
5) 7A16, AOA R
6) 7A17, AOA ALTN R
7) 7J15, ADC C PWR
S 424-006
(3) Install the ADC transformer:
(a)
Align the transformer with the holes on the adapter plate.
(b)
Install the transformer on the adapter plate.
(c)
Install the adapter plate.
(d)
Connect the wires to the transformer.
S 414-012
(4)
Close the main power distribution panels P6-3 and P6-4.
S 864-013
(5)
Supply electrical power (AMM 24-22-00/201).
S 864-230
(6)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a) P7 Overhead Circuit Breaker Panel
1) 7A10, ADC L PWR
2) 7A12, AOA L
3) 7A13, AOA ALTN L
4) 7A14, ADC R PWR
5) 7A16, AOA R
6) 7A17, AOA ALTN R
7) 7J15, ADC C PWR
S 714-129
WARNING: DO NOT ADJUST THE ANGLE OF ATTACK SENSOR WITH THE SENSOR HEAT
_______ ON. YOU CAN GET BURNED WHEN THE ANGLE OF ATTACK SENSOR HEAT IS ON.
(7) Do a test of the ADC transformer:
(a) Set the vane on the AOA sensor to |5°.
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CAUTION: DO NOT PUSH THE ADC TEST SWITCHES WHILE THERE IS PRESSURE
_______ IN THE PITOT-STATIC SYSTEM. THE ADC WILL GO INTO A FAILURE CONDITION AND TRANSMIT THIS CONDITION TO ITS INTERFACE SYSTEMS.
(b)
Push and hold the FUNCTIONAL TEST button on the front panel of the applicable air data computer (ADC). 1) Use the left ADC when you replace the left ADC transformer. 2) Use the right ADC when you replace the right ADC
transformer. 3) Use the center ADC when you replace the center ADC transformer.
(c)
Make sure a (-) shows in the EXTERNAL SENSOR FAULT display on the front of the ADC.
S 864-010
(8) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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