S 215-049
(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 865-050
(11)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a) P6 Main Power Distribution Panel 1) 6D32 PROBE HEAT AUX PITOT L 2) 6E01 PRIM T/E FLAP CONT AC 3) 6E02 PRIM T/E FLAP CONT DC
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
34-11-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400
MAINTENANCE MANUAL
TASK 34-11-00-795-051
6. The Auxiliary No. 2 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
E. Procedure
S 865-269
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.
CAUTION: MAKE SURE THAT YOU DO NOT APPLY ELECTRICAL POWER TO THE
_______ PITOT-STATIC PROBE HEATERS. YOU CAN CAUSE DAMAGE TO THE PITOT-STATIC PROBES.
(1) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P6 Main Power Distribution Panel
1) 6D33 PROBE HEAT AUX PITOT R
2) 6E01 PRIM T/E FLAP CONT AC
3) 6E02 PRIM T/E FLAP CONT DC
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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MAINTENANCE MANUAL
S 485-053
WARNING:_______MAKE SURE THAT THE PROBE HEAT IS NOT ON. YOU CAN CAUSE INJURY TO PERSONS.
(2) Install the pitot-static probe adapter on the lower right pitot-static probe.
CAUTION:_______DO NOT EXTEND THE SEALS INTO THE PITOT DRAINS. YOU CAN CAUSE DAMAGE 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, approximately 2.25 inches,
____
aft of the probe tip.
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: 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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