SEP 2012 R66 Maintenance Manual Chapter 32 Landing Gear Page 32.23
32-64 System Maintenance (continued)
B. Inflation Check
WARNING
D679 Cylinder contents are under extreme pressure. Install
MT545-1 pin assembly in D757-1 valve assembly during
maintenance to prevent cylinder discharge.
1. Unsnap outboard edge of both float covers.
2. Remove locking pin from valve, move inflation lever safety to READY position, and
verify area around floats is clear.
3. Squeeze inflation lever to inflate floats. Approximately 20 pounds force will be
required due to the shear-rivet. Time for floats to attain full shape without wrinkles
should be three seconds or less.
CAUTION
Floats inflate rapidly and with a loud noise. Keep area clear
during inflation and inform all nearby personnel. Remove or
close all doors prior to inflation. Open doors interfere with float
inflation and may be damaged.
4. Allow float temperatures to stabilize for at least five minutes then record OAT and
pressure in each float chamber. Minimum allowable pressures are:
OAT (degrees C)
Minimum Pressure
(psig) in Forward
Two Chambers
Minimum Pressure
(psig) in Middle
Chamber
Minimum Pressure
(psig) in Aft Two
Chambers
5-9 1.30 1.00 0.60
10-14 1.60 1.30 0.90
15-19 1.90 1.60 1.20
20-24 2.20 1.90 1.50
25-29 2.50 2.20 1.80
30-34 2.80 2.50 2.10
35-39 3.10 2.80 2.40
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