CSP-HMI-3 MD Helicopters, Inc.
MAINTENANCE MANUAL
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Copyright © 1999−2016 by MD Helicopters, Inc.
NOTES:
(1) Table 203: Electrical power usage breakdown during different operating conditions for electrically operated
equipment installed in the basic aircraft.
Table 204: Electrical power usage breakdown during different operating conditions for electrically operated
options installed in the aircraft.
Total power usage may be calculated at the bottom of Table 204. Circle the options installed and add their
amperage to the basic ship amperage to get the total.
(2) Power source consists of:
A. Generator P/N 369D28550 regulated at 29.4 to 29.6 Vdc.
B. Battery P/N 369D296503 (ni−cad, 17 AH rating, 20 cell, hi rate).
(3) This load is intermittent and is considered negligible.
(4) The entry ‘‘C’’ under oper. time denotes continuous.
(5) Max. duty cycle for hoist is 3 complete cycles (approx. 15 min. total) and then rest 40 minutes before
repeating cycle.
(6) Duty cycle for transmitting is one−half minute ON followed by five minutes OFF.
(7) Duty cycle for search light is ten minutes ON, ten minutes OFF.
(8) The start pump is also part of the anti−ice filter system (on with clogged filter only).
(9) See graph of starting current vs time.
(10) Charging current shown is for 50% charged battery (typical after 2 start attempts).
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