E8 L3 Environmentals Gauge Flashcards
Stage of compression tap off for wing anti-ice
9th stage
Normal regulated system pressure by bleed valve
45-60 psi
Bleed air valve driven toward closed (temperature)
450°F
Bleed air valve closed
490°F
Pre-cooler bypassed
<360°F
Precooler valve fully opened
> 425°F
Pre-cooler discharge temp OVERHEAT illuminates
505°F (+/-10)
FIREWALL CLOSED light illuminates
70-80 psig
FIREWALL CLOSED light extinguishes
73 (+/-1) psig
OVERPRESSURE light illuminates
83 (+/-2) psig
OVERPRESSURE light extinguishes
76 (+/-2) psig
ACM temperature output
35 (+3/-2) °F
35 degree control valve fully open
33°F
35 degree valve closed
38°F
Primary heat exchanger bypass valve
Maintain 60°F compressor inlet temp
Temp LEAK light illuminates in engine strut downstream on firewall SOV
310°F
Temp LEAK light illuminates anywhere along wing
255°F
AIR COND UNIT OFF light illuminates
245°F turbine inlets
AIR COND UNIT OVHT light illuminates
335°F compressor outlets
CREW/MAIN CABIN OVHT light illuminates
190°F
MAIN CABIN ALERT light illuminates
220°F
Normal operating range in inches of water
4-20 inches
Minimum inches of water to open trim air valve
4 inches
TURBO-FAN EXIT valves closed above
5000 ft AGL
VCM output temperature to PME
43°F
VCM PACK ON light time to illuminate
Up to 10 seconds
Time after (trip) reset before VCM back to ON
53 second
Number of VCM resets inflight
3
Equipment cooling VALVE OPEN light indicates
valve open more than 30 degrees
VALVE OPEN light extinguishes during climbout
2.8 psid
VALVE OPEN light illuminates during descent
1.8 psid
Draw Through OVBD VLV OPEN light
Overboard discharge valve open more than 3°
OVBD VLV OPEN light extinguishes after T/O
within 30 sec
COTS allowable temperature range
55 to 90°F
Pressurization in TAKEOFF position
Cabin altitude descends 250 ft below airport
Max differential pressure (both outflow valves)
8.6 psid
Pressure relief setting
9.42 psid positive / .36 psid negative
Emergency depressurization switch
1 psig of ambient within 60 seconds
Cabin altitude warning horn (LOSS OF PRESS)
10,000 (+/- 1000)
Cabin altitude override limits cabin altitude to
14,000 ft
Inner window cracked depressurize to
5.0 psid
Both windows cracked depressurize to
2.0 psid (inner and outer)
Stage of compressiong tap off for conditioned air
15th stage