ENGINE INDICATING -INDICATIONS -EICAS & SECONDARY ENGINE DISPLAYS

EFFECTIVITY BEJ ALL  77-00-00 
Page 9 
D633W101-BEJ  Sep 05/2002 

ENGINE INDICATING -INDICATIONS -PERFORMANCE & ENGINE EXCEEDANCE MAINTENANCE PAGES

Performance Maintenance Page
The top part of the performance maintenance page shows general airplane and environment data. GROSS WT is the gross weight of the airplane. SAT is the static air temperature and TAT is the total air temperature. The temperatures show in degrees Celsius. GS is the ground speed and CAS is the calibrated air speed. The speeds show in knots. ALT is the altitude in feet.
The bottom part of the performance maintenance page shows the same engine parameters as the EICAS display and the secondary engine display. These indications are described in their related sections. The page also shows the value for these indications:
*
PB

*
DUCT PRESS.

PB is the burner pressure in psi. The EEC gets PB from a tap on the HPC case.
DUCT PRESS is the manifold duct pressure in psi. It comes from the air supply cabin pressure controller (ASCPC).
Engine Exceedance Maintenance Page
The exceedance maintenance page shows exceedance profiles for rotor speeds (N1 and N2) and EGT. It can show up to eight different profiles. The rotor speeds can make four profiles and EGT can make four profiles. The oldest profile is on the left.
EFFECTIVITY
BEJ ALL

The N1 and N2 profiles show the highest actual rotor speed if it is higher than the redline. The profile also shows the redline value and the time the rotor speed is higher than the redline.
The EGT profile shows if the EGT is higher than the amber or redline. It also shows the type of exceedance as EGT START, EGT AMBER, or EGT REDLINE.
The EGT profile makes a record of EGT in increments. The time next to each increment tells how long the EGT was higher than that value. The total time of the exceedance shows next to the lowest EGT increment. The highest EGT is at the top of the profile and does not have a time value.
77-00-00

Page 10 D633W101-BEJ Sep 05/2002

ENGINE INDICATING -INDICATIONS -PERFORMANCE & ENGINE EXCEEDANCE MAINTENANCE PAGES

EFFECTIVITY BEJ ALL  77-00-00 
Page 11 
D633W101-BEJ  Sep 05/2002 

ENGINE INDICATING -INDICATIONS -EPCS MAINTENANCE PAGES

Indication
The EPCS maintenance pages show engine parameters from many engine sensors. The parameters show for channels A and B of the EEC. There is a box around the channel that the EEC uses to control the engine.
These engine parameters show on the EPCS maintenance page
1:
*
N1, LPC rotor speed (percent)

*
N2, HPC rotor speed (percent)

*
EGT, exhaust gas temperature (degrees C)
　
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本文鏈接地址：777 AMM 飛機維護手冊 發動機指示 Engine Indicating PW 777 AIRCRAFT MAINTENANCE MANUAL(4)