(3)  
Make sure that the pitot-static probes do not show damage to the pitot tip or the static ports (Ref 34-11-11/601).

 S 845-106

 (4)  
Close the STALL WARNING NO. 1 and NO. 2 circuit breakers on load control panels P6 and P18.

 S 845-107

 (5)  
Close the FLAP LOAD RELIEF circuit breaker on the load control panel P6.

 S 865-347

 (6)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 TASK 34-11-01-795-109
 5. The Auxiliary No. 1 Pitot System Leak Test
__________________________________________
 A. General
 (1)  The leak test is not necessary on these airplanes because the system is capped at the lower right pitot-static probe.
 TASK 34-11-01-795-150
 6. The Auxiliary No. 2 Pitot System Leak Test
__________________________________________
 A. Standard Tools and Equipment
 (1)  Air data test set, Castleberry AT700-2, Castleberry Instr & Avionics, Austin, TX; or equivalent
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH EFIS ú

 34-11-01

 ú ú 03 Page 518 ú Nov 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (2)  
Pitot-static probe adapter kit, P/N AD-953-7, Nav-Aids Ltd., Montreal, Canada; or equivalent

 (3)  
Flow restrictors, control valves, cutoff valves, vinyl adhesive tape, and port seals as required

 B. References
 (1)  
24-22-00/201, Manual Control

 (2)  
34-11-11/601, Pitot-Static Probe

 C. Prepare for the Test
 S 865-355
 (1)  Supply electrical power (AMM 24-22-00/201).
 S 865-356
 WARNING:_______YOU MUST OPEN THE FLAP LOAD RELIEF CIRCUIT BREAKER. YOU CAN CAUSE INJURY TO PERSONS.
 (2)  Open the FLAP LOAD RELIEF circuit breaker on the load control panel P6.
 S 485-358
 WARNING:_______MAKE SURE THAT THE PROBE HEAT IS NOT ON. YOU CAN CAUSE INJURY TO PERSONS.
 (3)  Install the pitot-static probe adapter on the lower left
 pitot-static probe.

 CAUTION:_______DO NOT EXTEND THE SEALS INTO THE PITOT DRAINS . YOU CAN CAUSE CAMAGE TO THE SURFACE IN THE AREA WHEN YOU REMOVE THE SEALS.
 (a)  Seal the pitot chamber drain hole on the bottom of the probe with vinyl adhesive tape.
 NOTE: You will find the drain hole about 2.25 inches aft of
____
 the probe tip.

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 34-11-01
 ú ú 03 Page 519 ú Mar 15/97

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 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 probe adapter with water.
 NOTE: A solution that has equal parts of ethylene glycol and
____ water must be used in temperatures between 32 degrees F and -40 degrees F.
 (c)  Install the probe adapter on the probe.
 S 485-359
 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.
 (4) Connect the pneumatic test set to the pitot-static probe adapter.
 (a)  
Connect the pitot (pressure) source in the pneumatic test unit 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 Auxiliary No. 2 Pitot System Leak Test
 S 865-158
 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.
　
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