(b)
Connect the first officer's static system drain fitting to the static cutoff valve through the static system test gage and flow restrictor.
NOTE: The First officer's static system drain fitting is found
____ on the right forward end of the nose wheel well.
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(c) Open the static cutoff valve.
D. The First Officer's Static System (Low-Range) Leak Test
S 865-217
CAUTION: MAKE SURE THAT THE PITOT LINE PRESSURE IS EQUIVALENT OR MORE
_______ THAN THE STATIC LINE PRESSURE. KEEP THE STATIC PRESSURE CHANGE BELOW 5000 FEET 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 a vacuum to the first officer's static system equal to 5,000 feet of altitiude above field elevation (ambient pressure minus
5.25 |0.25 in. Hg).
S 865-219
CAUTION: HOLD THE PRESSURE, 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 PRESSURE.
(2)
Close the static cutoff valve to the system when the necessary altitude is reached.
S 865-221
(3)
Stop for 5 to 6 minutes to allow the system to stabilize.
(4)
Write the altitude.
(5)
Stop for one minute and read the altitude again.
S 865-224
(6)
Make sure that the altitude does not decrease by more than 80 feet
S 865-222
S 865-223
(0.07 in. Hg).
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S 865-225
CAUTION: MAKE SURE THAT THE PITOT LINE PRESSURE IS EQUIVALENT OR MORE
_______ THAN THE STATIC LINE PRESSURE. KEEP THE STATIC PRESSURE CHANGE BELOW 5000 FEET 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.
(7) Open the static cutoff valve and send the first officer's static system to ambient pressure.
E. Put the Airplane Back to Its Usual Condition
S 085-376
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 drain fitting.
S 095-405
WARNING: WHEN THE STATIC PORTS ARE COVERED, MAKE SURE THAT CONDITION IS
_______ VISIBLE FROM THE GROUND. FAILURE TO OBSERVE AND REMOVE COVERINGS FROM THE STATICPORTS BEFORE FLIGHT MAY CAUSE LARGE ERRORS IN AIRSPEED SENSING AND ALTITUDE SENSING SIGNALS, WHICH MAY LEAD TO LOSS OF SAFE FLIGHT.
CAUTION: MAKE SURE THAT YOU REMOVE ALL OF THE PIECES OF TAPE FROM EACH
_______ PITOT-STATIC PROBE. THE SYSTEM WILL NOT OPERATE CORRECTLY WHEN THE TAPE IS IN ITS POSITION.
(2)
Remove the vinyl adhesive tape from the forward static ports (S1) on the upper right pitot-static probe.
S 845-231
(3)
Remove the vinyl adhesive tape from the forward static ports (S1) on the lower left pitot-static probe.
S 845-232
(4)
Examine the static ports for unwanted materials and rough locations on the inner and outer surfaces (Ref 34-11-11/601).
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