ARCTIC WEATHER APU STARTING (CONT)
g. With jet start petcock (6) closed, prime jet start valve by pulling full out. Ensure that it stays out.
h. On curbside of gooseneck, second person must open cover on APU control box (5).
i. Second person must pull knob of APU throttle control (8) fully outward.
On APU with APU engine serial number 504697 and subsequent, the glow plug
indicator is changed from a glow-type indicator to a lamp driven by a timer.
j. Second person must turn APU START switch (5) to GLOW position and hold until glow plug indicator (glow type)
(9) illuminates brightly (15 to 20 seconds) or until glow plug indicator (lamp) (9.1) extinguishes (5 seconds).
Do not exceed 30 seconds continuous cranking with decompression valve closed
or damage to starter way result. Allow starter to cool down for at least 2 minutes
between each 30-second cranking or damage to the starter may result.
k. Second person must turn start switch (7) to START position and hold for approximately 30 seconds.
l. Once APU engine starts to turn over, pump jet start valve (7) three times to prime APU.
m. When APU engine is running smoothly, turn jet start petcock (6) clockwise to close. Lower and secure step
2-210 Change 1