S 864-047
(4)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P18 Load Control Center
1) B9, STBY ALTM/ASI VIBR
(b)
P42 5-Volt Lighting Main Instrument Panel 1) 26V AC STANDBY PWR
S 864-048
(5)
Make sure the indicator lights are on.
S 794-120
(6)
AIRPLANES WITHOUT EFIS;
Do the alternate static system low-range leak test
(AMM 34-11-00/501).
NOTE: If a quick-disconnect fitting is replaced or installed, you
____ must do a leak check. If you only disconnect and connect a quick-disconnect, no leak test is required.
S 794-121
(7) AIRPLANES WITH EFIS; Do the Auxiliary No. 2 Pitot System Leak Test (AMM 34-11-01/501).
NOTE: If a quick-disconnect fitting is replaced or installed, you
____ must do a leak check. If you only disconnect and connect a quick-disconnect, no leak test is required.
S 864-089
(8) Remove electrical power if it is not necessary (AMM 24-22-00/201).
TASK 34-12-21-024-101
8. AIRPLANES WITH TAT/SAT/TAS INDICATOR; TAT/SAT/TAS Indicator Removal
_____________________________
A. General
(1) The TAT/SAT/TAS indicator is installed on the F/O's instrument panel (P3). The indicator is connected to the ARINC 429 digital bus 2.
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737-300/400/500MAINTENANCE MANUAL
B. Procedure
S 864-093
(1) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P18 Load Control Center
1) A7, TAT Indicator
(b)
P42 5-Volt Lighting Main Instrument Panel 1) 5V AC SEC
S 024-094
(2) Remove the TAT/SAT/TAS indicator.
(a) Loosen the two adjustment screws adjacent tothe indicator.
CAUTION: CAREFULLY PULL THE INDICATOR FROM THE INSTRUMENT PANEL.
_______ TOO MUCH FORCE CAN CAUSE DAMAGE TO THE ELECTRICAL CABLE ON THE REAR OF THE INDICATOR.
(b)
Pull the indicator from the instrument panel.
(c)
Disconnect the electrical connector from the rear of the indicator.
(d)
Put dust caps on the electrical connectors.
TASK 34-12-21-424-103
9. AIRPLANES WITH TAT/SAT/TAS INDICATOR; TAT/SAT/TAS Indicator Installation
__________________________________
A. Reference
(1) AMM 24-22-00/201, Manual Control
B. Procedure
S 864-095
(1) Make sure that these circuit breakers are open with the DO-NOT-CLOSE tags attached:
(a)
P18 Load Control Center
1) A7, TAT Indicator
(b)
P42 5-Volt Lighting Main Instrument Panel 1) 5V AC SEC
S 424-096
(2) Install the TAT/SAT/TAS indicator.
(a)
Remove the dust cap from the electrical connector.
(b)
Connect the electrical connector at the rear of the indicator.
CAUTION: CAREFULLY PUT THE INDICATOR INTO THE INSTRUMENT PANEL.
_______ TOO MUCH FORCE CAN CAUSE DAMAGE TO THE ELECTRICAL CABLE ON THE REAR OF THE INDICATOR.
(c)
Put the indicator into the instrument panel.
(d)
Tighten the two adjustment screws adjacent to the indicator.
S 864-097
(3) Supply electrical power (AMM 24-22-00/201).
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S 864-104
(4) Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a) P18 Load Control Center
1) A7, TAT Indicator
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