Mod. : 4292
ATR 42 Model : 500
SYSTEMS
LIMITATIONS
P 2
NOV 97
100
2.01
.
05
OXYGEN
Minimum flight crew oxygen pressure with and without observer and capacity with full pax
(50 cabin occupants).
T
O
F
A
–02–01–05–002–A
100A
A
MINIMUM BOTTLE PRESS
(STANDARD CONDITION 21
°
C)
(PSI)
M
IN
B
O
TTLE
P
R
E
S
S
INDI
CA
T
IO
N
(P
S
I)
AVAILABLE TIME AFTER
DECOMPRESSION
HOLDING ALTITUDE
R
This graph gives the minimum bottle pressure required after loss of cabin pressure to
provide crew members and 100 % of passengers protection with diluted oxygen during
descent from FL 250 to holding level followed by descent to FL100 (rate 3000 ft/minutes).
Reference Temperature = Cabin Temperature or OAT whichever is higher, on ground.
= Cabin Temperature, in flight.
Note : - At dispatch the computed flight time after decompression should be at least
1/2
of estimated flight time to destination or flight time to the longest en route
alternate which ever is higher.
Provision is made to cover :
- unusuable quantity
- normal system leakage
- Ref. Temp errors
AA
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01/07//2018 REV 1 These notes are not revised after issue For Training Purposes Only
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