CAUTION: MAKE SURE THAT YOU FLUSH THE PROBE ADAPTER WITH WATER
_______ BEFORE YOU ATTACH THE ADAPTER TO THE PROBE. YOU CAN CAUSE DAMAGE TO THE PROBE OR THE ADAPTER.
(b)
Flush the pitot-static probe adapter with water. NOTE: Use equal parts of water and ethylene glycol when the
____ temperature is between 32 degrees F and -40 degrees F.
(c)
Install the probe adapter on the probe.
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737-300/400/500MAINTENANCE MANUAL
S 485-337
CAUTION: MAKE SURE THAT THE PITOT-STATIC PROBE HAS NO ADDED WEIGHT FROM
_______ THE TEST HOSES. YOU CAN BEND OR TWIST THE PITOT-STATIC PROBE OUT OF TOLERANCE.
(5) Connect the pneumatic test set to the pitot-static probe adapter:
(a)
Connect the pitot (pressure) source in the pneumatic test set through the pitot control valve to the pitot cutoff valve.
(b)
Connect the inlet of the probe adapter to the pitot cutoff valve through the pitot system test gage and flow restrictor.
(c)
Open the pitot cutoff valve.
D. The Captain's Pitot System Leak Test
S 865-062
CAUTION: MAKE SURE THAT THE PITOT LINE PRESSURE IS EQUIVALENT OR MORE
_______ THAN THE STATIC LINE PRESSURE. KEEP THE PITOT PRESSURE CHANGE BELOW 300 KNOTS FOR EACH MINUTE. MAKE SURE THAT THE DIFFERENTIAL PRESSURE STAYS BETWEEN 0 AND 10.00 INCHES OF MERCURY. YOU CAN CAUSE DAMAGE TO THE PITOT-STATIC SYSTEM.
(1) Apply pressure to the pitot-static system equal to 300 |5 knots of airspeed (4.53 |0.16 in. Hg differential).
S 865-064
CAUTION: HOLD THE VACUUM, AS AN ALTERNATIVE, BEHIND THE CUTOFF VALVES
_______ DURING THE CUTOFF TIME. YOU CAN CAUSE DAMAGE TO THE EQUIPMENT WHEN YOU OPEN THE CUTOFF VALVES WITHOUT THE VACUUM.
(2)
Close the pitot cutoff valve to the system when the necessary airspeed is reached.
(3)
Stop for 5 to 6 minutes to permit the system to become stable.
(4)
Write the airspeed.
(5)
Stop for one minute and read the airspeed again.
S 865-069
(6)
Make sure that the airspeed does not decrease by more than 5.0 knots
S 865-066
S 865-067
S 865-068
(0.16 in. Hg).
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737-300/400/500MAINTENANCE MANUAL
S 865-070
CAUTION: TO PREVENT EQUIPMENT DAMAGE, THE PITOT LINE PRESSURE MUST
_______ ALWAYS EQUAL OR EXCEED STATIC LINE PRESSURE. KEEP RATE OF PITOT PRESSURE CHANGE LESS THAN 300 KNOTS FOR EACH MINUTE. KEEP THE DIFFERENTIAL PRESSURE BETWEEN 0 AND 10.00 INCHES OF MERCURY.
(7) Open the pitot cutoff valve and send the captain's pitot system to ambient pressure.
NOTE: You must release the vacuum from the cutoff valves slowly.
____
E. Put the Airplane Back to Its Usual Condition
S 085-338
CAUTION: MAKE SURE THAT THE PITOT-STATIC PROBE HAS NO ADDED WEIGHT FROM
_______ THE TEST HOSES. YOU CAN BEND OR TWIST THE PITOT-STATIC PROBE OUT OF TOLERANCE.
CAUTION: DO NOT DISCONNECT THE PNEUMATIC TEST SET WHEN THE PITOT-STATIC
_______ SYSTEM IS NOT AT AMBIENT PRESSURE. YOU CAN CAUSE DAMAGE TO THE EQUIPMENT.
(1)
Disconnect the pneumatic test set from the pitot-static probe adapter.
S 085-339
(2) 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：737-300 400 500 AMM 飛機維護手冊 導航 NAVIGATION 1(44)
