*
TRA, thrust resolver angle (degrees)
*
T/R, left and right thrust reverser position (percent deployed)
*
PAMB, ambient pressure (psi)
*
PB, burner pressure (psi)
*
P2, fan inlet pressure (psi)
*
P5 (P4.95), turbine exhaust pressure (psi)
*
T2, fan inlet temperature (degrees C)
*
2.5 BLD, 2.5 bleed valve actuator position (percent open)
*
SVA, variable stator vane actuator position (percent open)
*
OIL T, oil temperature (degrees C)
*
OIL P, oil pressure (psi).
These engine parameters show on the EPCS maintenance page
2:
*
FMV, fuel metering valve position (percent open)
*
TCA, turbine vane cooling air valve position (percent open)
*
LPT TCC, LPT turbine case cooling valve position (percent open)
*
HPT TCC, HPT turbine case cooling valve position (percent open)
*
FUEL T, fuel temperature (degrees C)
*
ENG AOC, engine air/oil cooler valve position (percent open)
*
IDG AOC, IDG air/oil cooler valve position (percent open)
*
VSCF AOC, VSCF air/oil cooler valve position (percent open).
Refer to the related ATA chapter for more information about these indications.
Status Words
The status words at the bottom of the page show data about the EEC. Each word is a four character hexadecimal number. When decoded, each word shows 16 different parameters.
EFFECTIVITY BEJ ALL 77-00-00
Page 12
D633W101-BEJ Sep 05/2002
ENGINE INDICATING -INDICATIONS -EPCS MAINTENANCE PAGES
EFFECTIVITY BEJ ALL 77-00-00
Page 13
D633W101-BEJ Sep 05/2002
PW4000 SERIES ENGINES
777 AIRCRAFT MAINTENANCE MANUAL
THIS PAGE IS INTENTIONALLY LEFT BLANK
77-00-00
Page 14 D633W101-BEJ Sep 05/2002
ENGINE INDICATING -INDICATIONS -PROPULSION DATA LIMITS MAINTENANCE PAGES
Propulsion Data Limits -Page 1
The propulsion data limits maintenance page 1 shows data limits for these engine parameters:
*
Rotor speeds
*
EGT
*
Oil pressure
*
Oil temperature.
Propulsion Data Limits -Page 2
The propulsion data limits maintenance page 2 shows these limits:
*
Exceedance profiles
*
Takeoff thrust
*
Minimum idle
*
Oil quantity
*
Vibration
*
In-flight relight
*
Cross-bleed start.
The exceedance profile display shows the limits for the EGT profiles. The EGT profiles show on the engine exceedance maintenance page (not shown). EGT OPER ORIGIN is the start of the operating EGT exceedance temperature profile. The profile records after the engine starts and runs above the limit. EGT START ORIGIN is the start of the engine start temperature exceedance profile. The profile records while the engine starts and an out of limit EGT occurs.
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