Boeing 737-600 - Subtask 30-71-00-720-002; Subtask 30-71-00-862-001; Subtask 30-71-00-860-006; Task 30-71-00-720-802 - Water and Drain Heater Tests

(WARNING PRECEDES)
CAUTION
DO NOT OPERATE THE DRAIN MAST HEATERS IN THE AIR MODE FOR
MORE THAN 5 MINUTES. THE DRAIN MASTS WILL BECOME TOO HOT.
(4) Make sure that this circuit breaker is closed:
CAPT Electrical System Panel, P18-3
Row Col Number Name
E 4 C00700 HEATERS DRAIN MAST AIR
SUBTASK 30-71-00-720-002
(5) Make sure that the forward and aft drain masts become hot.
(a) You can use an Infrared Thermometer, COM-1572 or other temperature measuring
device to make sure the drain mast is at least 10 degrees F (6 degrees C) warmer than
the ground mode test temperature.
(b) As an alternative, you can use a clamp-on current meter, COM-2531 or equivalent to
measure the current to the drain mast heater.
1) Make sure there is greater current to the heater than in the ground mode.
ILF 101, 151, 156-199, 310, 315, 319, 323, 331-399, 402, 406, 416, 451, 452, 491-501, 503, 504, 509,
510, 512, 514, 523-528, 530-533, 535, 537, 541, 552-557, 559-564, 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, 968-973,
980-999; ILF 301, 304, 308, 314, 317, 318, 401, 405, 409, 410, 412, 424, 425, 427-429, 502, 507, 508,
513, 515, 516, 518-520, 536, 542 POST SB 737-24-1147
SUBTASK 30-71-00-862-001
(6) Make sure the CAB/UTIL switch is set to the OFF position.
ILF ALL
SUBTASK 30-71-00-860-006
(7) Put the airplane back in the ground mode. To put it in the ground mode, do this task: Return
the Airplane to the Ground Mode, TASK 32-09-00-860-802.
END OF TASK
TASK 30-71-00-720-802
3. Water and Drain Heater Tests
(Figure 501)
A. References
Reference Title
24-22-00-860-813 Supply External Power (P/B 201)
25-27-15-000-801 Carpet Removal (P/B 401)
25-27-15-400-801 Carpet - Installation (P/B 401)
25-27-21-000-801 Entry and Service Area Floor Covering - Removal (P/B 401)
25-27-21-400-801 Entry and Service Area Floor Covering - Installation (P/B 401)
25-52-06-000-801 Cargo Compartment Sidewall Lining - Removal (P/B 401)
25-52-06-400-801 Cargo Compartment Sidewall Lining - Installation (P/B 401)
25-52-10-000-801 Cargo Floor Panel Removal (P/B 401)
25-52-10-400-801 Cargo Floor Panel - Installation (P/B 401)
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-71-00
Page 503
D633A101-ILF Jun 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL