ILF 101, 151, 156-199, 401, 402, 405, 406, 409, 410, 412, 416, 424, 425, 427-429, 451, 452, 491-504,
507-510, 512-516, 518-520, 523-528, 530-533, 535-537, 541, 542, 552-557, 559, 560, 562-564, 567-569,
571-577, 581, 583, 585, 588-590, 592-599, 601-603, 606, 607, 610-615, 620, 625-627, 671, 672, 686,
691-699, 703, 707-710, 803-813, 821, 822, 831-838, 841, 842, 851, 852, 854-858, 861-863, 871-874,
947, 948, 971
(a) Make sure that the corresponding ON light on the window/pitot heat control panel comes
on.
NOTE: It can take up to 15 seconds for a light to come on.
NOTE: If the window temperature is more than 110°F (43°C) corresponding ON light on
the window/pitot heat control panel stays off.
ILF 301, 304, 308, 310, 314, 315, 317-319, 323, 331-399, 561, 968-970, 972, 973, 980-999
(b) Make sure that the corresponding OFF light on the window/pitot heat control panel goes
out.
NOTE: It can take up to 15 seconds for a light to go out.
NOTE: If the window temperature is more than 110°F (43°C) corresponding OFF light on
the window/pitot heat control panel stays on.
ILF ALL
(c) Make sure that both MASTER CAUTION lights on the glareshield panel, P7, are off.
SUBTASK 30-41-11-860-004
(3) Put the WINDOW HEAT OVHT/PWR TEST switch to the OVHT position for 1 second.
(a) Make sure that the OVERHEAT lights come on.
(b) Make sure the MASTER CAUTION lights come on.
(c) Make sure ANTI-ICE light comes on.
ILF 101, 151, 156-199, 401, 402, 405, 406, 409, 410, 412, 416, 424, 425, 427-429, 451, 452, 491-504,
507-510, 512-516, 518-520, 523-528, 530-533, 535-537, 541, 542, 552-557, 559, 560, 562-564, 567-569,
571-577, 581, 583, 585, 588-590, 592-599, 601-603, 606, 607, 610-615, 620, 625-627, 671, 672, 686,
691-699, 703, 707-710, 803-813, 821, 822, 831-838, 841, 842, 851, 852, 854-858, 861-863, 871-874,
947, 948, 971
(d) Make sure the ON lights go off in less than 70 seconds.
ILF 301, 304, 308, 310, 314, 315, 317-319, 323, 331-399, 561, 968-970, 972, 973, 980-999
(e) Make sure the OFF lights go on in less than 70 seconds.
ILF ALL
SUBTASK 30-41-11-860-005
(4) One switch at a time, put each window heat control switch in the OFF position for 1 second
and then put the switch in the ON position.
(a) Make sure that the applicable OVERHEAT light goes off.
ILF 101, 151, 156-199, 401, 402, 405, 406, 409, 410, 412, 416, 424, 425, 427-429, 451, 452, 491-504,
507-510, 512-516, 518-520, 523-528, 530-533, 535-537, 541, 542, 552-557, 559, 560, 562-564, 567-569,
571-577, 581, 583, 585, 588-590, 592-599, 601-603, 606, 607, 610-615, 620, 625-627, 671, 672, 686,
691-699, 703, 707-710, 803-813, 821, 822, 831-838, 841, 842, 851, 852, 854-858, 861-863, 871-874,
947, 948, 971
(b) Make sure the window heat ON light comes on.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-41-11
Page 502
D633A101-ILF Jun 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
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