Transmission EPs Flashcards
2 categories of main xmsn malfunctions
chip and lubrication
if chip problem
consider reducing load (PCL to IDLE, gen off)
if lubrication problem
consider securing main gens after APU gen turned on
Impending failure of accessory module
input chip caution
Indications of accessory drive failure
loss of hyd pump and generator
low but steady oil px
single pump failure
continually decreasing px
leak
loss of tail rotor drive in as little as ___ min after ___
8; catastrophic loss of lubricaiton
TR drive failures precipitated by __, approx. __ min prior to failure
dramatic increase in vibs/noise; 1 min
Lights for main transmission malfunction
Adv: OIL HOT, PRESS HI, PRESS LO
Caution: OIL HOT, PRESS HI, PRESS LO, #1/#2 ACC CHIP, MAIN CHIP
MAIN XMSN PRESS HI caution
px > 130 psi on vids
MAIN XMSN OIL HOT advisory
oil temp greater than or equal to 105 on vids and caution is NOT activated
MAIN XMSN PRESS HI advisory
oil px between 65 to 130 psi on vids and caution is NOT activated
MAIN XMSN PRESS LO advisory
oil px less than or equal to 30 psi on vids, Nr is greater than or equal to 25% and caution is NOT activated
XMSN OIL HOT caution comes on at
117 deg C