(d)
Write the airspeed.
(e)
Stop for 1 minute and read the airspeed again.
(f)
Make sure that the airspeed does not go down by more than 5.0 knots (0.16 in. Hg).
S 865-024
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 10.19 INCHES OF MERCURY. YOU CAN CAUSE DAMAGE TO THE PITOT-STATIC SYSTEM.
(5)
Open the pitot cutoff valve.
S 865-265
(6)
Put the captain's pitot system to ambient pressure.
S 085-025
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.
(7)
Disconnect the pneumatic test set from the pitot-static probe adapter.
S 085-026
(8)
Remove the pitot-static probe adapter from the upper left pitot-static probe.
(a) Remove the probe adapter from the probe.
NOTE: Dry off the pitot-static probe with a soft rag when you
____ use ethylene glycol.
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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.
(b) Remove the vinyl adhesive tape from the drain hole of the probe pitot chamber.
S 215-027
(9)
Examine the pitot-static probes for unwanted materials and rough locations on the inner and outer surfaces (Ref 34-11-01/601).
S 215-028
(10)
Make sure that the pitot-static probes do not show damage to the probe tip or the static ports (Ref 34-11-01/601).
S 865-029
(11)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a) P6 Main Power Distribution Panel
1) 6D30 PROBE HEAT PITOT L
2) 6E01 PRIM T/E FLAP CONT AC
3) 6E02 PRIM T/E FLAP CONT DC
TASK 34-11-00-795-030
4. The First Officer's Pitot System Leak Test
__________________________________________
A. Standard Tools and Equipment
(1)
Adapters
(a) Pitot-static probe test adapter -Rosemount Engineering, P/N 884EE with RCF kit P/N 508 or, RCF Seals & Couplings, Inc., P/N 508747, (4 required)
(2)
Pneumatic Test Set
(a) Dry air pressure source, - 30 to 35 inches of mercury (absolute).
(3)
Gages
(a)
Pitot system test gage - required to indicate 10 to 30 inches of mercury (absolute) with an accuracy of |0.16 (readable to |0.03) inch of mercury or |5 (readable to |1) knots.
(b)
Differential pressure gage - required to indicate 10 inches of mercury differential pressure (minimum) with an accuracy of |0.010 inch of mercury.
(4)
Flow restrictors, control valves, cutoff valves, pressure tape and port seals as required.
B. Consumable Materials
(1) G00000, Soft rag for wiping off pitot-static probe
C. References
(1) 34-11-01/601, Pitot-Static Probe
D. Access
(1) Location Zone 116 Area Between Nose Gear Well and Fuselage, RH
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E. Procedure
S 865-262 WARNING: MAKE SURE THAT YOU DO NOT APPLY ELECTRICAL POWER TO THE FLIGHT
_______ CONTROLS. FLIGHT CONTROL SURFACES CAN MOVE AUTOMATICALLY WHEN YOU PRESSURIZE THE PITOT-STATIC SYSTEM. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
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