CSP-HE/HS-1
Optional Equipment
Utiltiy Floats
ROTORCRAFT FLIGHT MANUAL
MD 500
(Models 369HE/HS/HM
)
Revision 6
9-49
FAA Approved
Changes of altitude are limited is accordance with the following:
If The Base
Altitude Float
Pressure Is:
(psig)
The Allowable
Altitude
Increase Is:
(feet)
The Allowable
Altitude
Decrease Is:
(feet)
1.5 (minimum)
7400
0
2.0
5100
1000
3.0
3000
3000
4.0
1000
5100
5.0
0
7400
NOTE
:
This will include the normal variations in ambient temperature associated with
changes in altitude.
The floats incorporate a pressure relief valve with a nominal setting of 5 psig.
If the allowable increase in altitude noted above is exceeded, minimum opera−
tional float pressure (1.5 psig) will not be available on return to base altitude.
To account for variations in ambient temperature or water temperature at a
given base of operations, the following criteria should be used to maintain the
minimum 1.5 psig inflation pressure.
When an ambient (air) temperature or water temperature colder than the tem−
perature at initial inflation is anticipated, float inflation pressure should be in−
creased 0.5 psig (above minimum 1.5 psig) for each 15 degrees decrease in
temperature anticipated.
EXAMPLE: Floats inflated to 1.5 psig
75
°
F
ambient temperature at time of inflation
50
°
F
anticipated water temperature at scheduled landing site
25
°
F
temperature decrease
Pressure change to account for: (25
°
15
°
) X 0.5 psig = 0.8 psig
Minimum float inflation pressure for this operation would be:
1.5 psig + 0.8 psig = 2.3 psig
Temperature increase will increase float inflation pressure and need not
be considered.
Kit Combinations Limitations:
The 369H90060 Passenger Step Kit may not be installed in combination
with the Utility Floats.
