(3)
71-00-00/501, Power Plant
(4)
WDM 30-34-11, 30-34-21, 30-34-31, 30-34-41, 73-21-76, 73-21-77
(5)
SSM 30-34-01, 30-34-02, 30-34-03, 30-34-04, 73-21-03
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73-21-03
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E. Access
(1)
Location Zone
411 Engine 1 - Inlet Cowl 1 o'clock
421 Engine 2 - Inlet Cowl 1 o'clock
431 Engine 3 - Inlet Cowl 1 o'clock
441 Engine 4 - Inlet Cowl 1 o'clock
(2)
Access Panel
411AR PT2/TT2 Probe Access Door - Engine 1
421AR PT2/TT2 Probe Access Door - Engine 2
431AR PT2/TT2 Probe Access Door - Engine 3
431AR PT2/TT2 Probe Access Door - Engine 4
F.
Prepare for the Installation
S 164-013-N00
(1) Remove all remaining sealant from the PT2/TT2 probe (9) and the
inlet cowl.
S 114-031-N00
WARNING:_______DO NOT GET SOLVENT IN YOUR MOUTH OR EYES, OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM SOLVENT. PUT ON A PROTECTIVE SPLASH GOGGLE AND GLOVES WHEN YOU USE SOLVENT. KEEP SOLVENT AWAY FROM SPARKS, FLAME, AND HEAT. SOLVENT IS A POISONOUS AND FLAMMABLE SUBSTANCE WHICH CAN CAUSE INJURY OR DAMAGE.
(2)
Use the solvent to clean the area of the PT2/TT2 probe (9) to be
sealed.
S 944-015-N00
(3)
Install the protection mats in the inlet cowl.
S 114-016-N00
(4)
From the inner side of the inlet cowl, use the solvent to clean the
area to be sealed and the inner side of the slot.
G.
Install the PT2/TT2 Probe
(1)
Remove the cap from the PT2 sense fitting on the PT2/TT2 probe (9).
S 424-018-N00
(2)
Put the PT2/TT2 probe T687 (9) in the inlet cowl slot from the
opening of the access panel (2).
S 434-019-N00
(3)
Attach the PT2/TT2 probe (9) to the studs with the nuts (7) and
washers (8).
(a)
Tighten the nuts (7).
S 434-017-N00
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(4) S 434-020-N00If you will install a new PT2/TT2 probe (9), do the steps that follow: (a) Install the new packing (10) on the PT2 sense fitting on the PT2/TT2 probe (9). (b) Install the reducer (11) on the PT2 sense fitting. 1) Tighten the reducer (11).
(5) S 434-032-N00Remove the cap from the PT2 sense tube (12).
(6) S 434-021-N00Connect the PT2 sense tube (12) to the reducer (11) on the PT2/TT2 probe (9). (a) Tighten the coupling nut.
(7) S 434-022-N00Install the bonding jumper (14) on the PT2/TT2 probe (9) with the bolt (4), washers (3), and nut (13) (Ref 20-11-15/401).
(8) S 224-023-N00Examine the electrical bonding between the PT2/TT2 probe (9) and the mounting structure (Ref 20-22-01/601). (a) The resistance must be 0.001 ohms maximum.
(9) S 434-033-N00Remove the caps from the electrical connectors DT867B (5) and DT867A (6).
S 434-024-N00
(10)
Connect the electrical connectors DT867B (5) and DT867A (6) to the PT2/TT2 probe (9).
S 394-025-N00
(11)
Apply the sealant to the PT2/TT2 probe (9).
(a)
From the inner side of the inlet cowl, apply the sealant, a minimum of 0.25 inch (6.4 mm), in the slot around the PT2/TT2 probe (9).
(b)
Make the sealant smooth, around the PT2/TT2 probe (9), to the same level as the inner surface of the inlet cowl.
S 944-026-N00
(12)
Remove the protection mats from the inlet cowl.
S 414-027-N00
(13)
Install the access panel (2) for the PT2/TT2 probe.
