Boeing 737-600 - Subtask 30-41-41-760-001; Subtask 30-41-41-860-009; Subtask 30-41-41-710-001; Subtask 30-41-41-860-003

ILF 151, 331, 402, 405, 406, 452, 509, 510, 512, 519, 520, 523, 525-528, 530, 553-555, 575, 703; ILF 101, 156-199,
301, 304, 308, 310, 314, 315, 317-319, 323, 332-399, 401, 409, 410, 412, 416, 424, 425, 427-429, 451, 501, 504,
507, 508, 513, 515, 516, 518, 531-533, 535-537, 541, 542, 552, 556, 557, 571-574, 576, 686, 803-813, 821, 822,
831, 854-856, 861-863, 871-873 POST SB 737-56-1017 (Continued)
F/O Electrical System Panel, P6-12
Row Col Number Name
B 7 C00395 WINDOW HEAT POWER R4 & R5 (INOP)
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SUBTASK 30-41-41-760-001
(2) On the captain's main instrument panel, P1, set the switch for the master dim and test lights to
TEST.
(a) Make sure all the lights on the window/pitot heat module [1] come on.
SUBTASK 30-41-41-860-009
(3) On the captain's main instrument panel, P1, set the switch for the master dim and test lights to
BRT.
SUBTASK 30-41-41-710-001
(4) Put the PITOT & PROBE HEAT switches to the ON position.
(a) Make sure the pitot heat indications on the module go off.
WARNING
DO NOT TOUCH THE PROBES WHEN YOU CHECK FOR HEAT. THE
PROBE TEMPERATURES CAN REACH 800 DEGREES F (427 DEGREES
C) IN STILL AIR.
(b) Make sure the pitot probes get hot.
NOTE: You can check for heat by spraying the probe with water and watching for steam.
ILF 301, 304, 308, 317, 318, 332, 496, 499, 500, 512, 557, 568, 581, 686, 803, 808-811, 813, 821, 822,
836, 837, 851, 852, 857, 858, 947, 968-971, 973 PRE SB 737-30A1063
SUBTASK 30-41-41-860-003
(5) Put the PITOT & PROBE HEAT switches to the OFF position.
ILF 101, 151, 156-199, 310, 314, 315, 319, 323, 331, 333-399, 401, 402, 405, 406, 409, 410, 412, 416,
424, 425, 427-429, 451, 452, 491-495, 497, 498, 501-504, 507-510, 513-516, 518-520, 523-528,
530-533, 535-537, 541, 542, 552-556, 559-564, 567, 569, 571-577, 583, 585, 588-590, 592-599,
601-603, 606, 607, 610-615, 620, 625-627, 671, 672, 691-699, 703, 707-710, 804-807, 812, 831-835,
838, 841, 842, 854-856, 861-863, 871-874, 948, 972, 980-999; ILF 301, 304, 308, 317, 318, 332, 496,
499, 500, 512, 557, 568, 581, 686, 803, 808-811, 813, 821, 822, 836, 837, 851, 852, 857, 858, 947,
968-971, 973 POST SB 737-30A1063
SUBTASK 30-41-41-860-006
(6) Put the PITOT & PROBE HEAT switches to the AUTO position.
ILF ALL
SUBTASK 30-41-41-860-007
(7) Make sure the pitot heat indications on the module come on.
SUBTASK 30-41-41-860-004
(8) Put the WINDOW HEAT switches to the ON position.
NOTE: Do not power test when all ON lights are illuminated
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-41-41
Page 407
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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