(c)
Carefully pull the probe away from the fuselage until you can get at the hoses and the electrical connector.
(d)
Disconnect the electrical connector from the probe.
(e)
Install a dust cap on the electrical connector.
CAUTION: USE TWO WRENCHES TO APPLY PRESSURE TO EACH SIDE OF THE
_______ HOSE CONNECTIONS. THIS WILL PREVENT DAMAGE TO THE PROBE.
(f)
Remove the hose connections from the bottom of the probe.
(g)
Install dust caps on the hoses.
(h)
Remove the gasket and discard it.
TASK 34-11-01-424-018
3. Pitot-Static Probe Installation (Fig. 401)
_______________________________
A. Standard Tools and Equipment
(1) Resistance bridge or ohmmeter that can measure 0.010 ohm with an accuracy of 0.001 ohm.
B. Consumable Materials
(1)
A00247 Sealant - BMS 5-95, Class B-1/2
(2)
B00184 Solvent - BMS 11-7
(3)
G02409 Corrosion Inhibiting Compound - Dinitrol AV5B
(4)
G00040 Nylon Cord - V-T-295, Type 1, Class 2, Size 9
C. References
(1)
AMM 20-11-14/701, Metal Surface Cleaning
(2)
AMM 30-31-00/501, Pitot-Static Probe Anti-Icing
(3)
AMM 34-11-00/501, Pitot-Static System
(4)
AMM 51-31-01/201, Seals and Sealing
(5)
AIPC 34-11-01 Fig. 1
D. Access
(1) Location Zones
113 Nose Gear Well, LH
211 Passenger Cabin Nose to First Door, LH
114 Nose Gear Well, RH
212 Passenger Cabin Nose to First Door, RH
E. Install the Pitot-Static Probe
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34-11-01
ALL ú ú 01 Page 406 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 864-006
CAUTION: DO NOT USE TOO MUCH FORCE TO INSTALL THE PITOT-STATIC PROBE.
_______ YOU CAN CAUSE DAMAGE TO THE PITOT-STATIC PROBE.
(1) Make sure these circuit breakers are open with the DO-NOT CLOSE tags attached:
(a) P6 Main Power Distribution Panel
1) 6D30, PROBE HEAT PITOT L
2) 6D31, PROBE HEAT PITOT R
3) 6D32, PROBE HEAT AUX PITOT L
4) 6D33, PROBE HEAT AUX PITOT R
S 164-007
(2) Clean and prepare the surface and the sides of the installation hole (AMM 20-11-14/701).
S 144-008
CAUTION: DO NOT PERMIT UNWANTED MATERIALS TO GO INTO THE PITOT-STATIC
_______ PROBE. UNWANTED MATERIALS CAN CAUSE CONTAMINATION OF THE PITOT-STATIC SYSTEM.
CAUTION:_______REMOVE THE PROTECTIVE COVER FROM THE PITOT-STATIC PROBE. THIS WILL PREVENT DAMAGE TO THE PROBE.
(3)
Clean the surface of the pins on the bottom of the probe (AMM 20-11-14/701).
S 624-009
(4)
Apply a thin layer of corrosion inhibiting compound, BMS 3-23, to the surface of the pins.
S 424-010
(5)
Install the pitot-static probe:
(a)
Remove the dust caps from the hoses.
(b)
Install the new gasket on the bottom of the probe.
CAUTION: USE TWO WRENCHES TO APPLY PRESSURE TO EACH SIDE OF THE
_______ HOSE CONNECTIONS. THIS WILL PREVENT DAMAGE TO THE PROBE.
(c) Connect the hoses to the bottom of the pitot-static probe.
NOTE: The hose connections are three different dimensions.
____
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