Tire Inflation; Propeller Servicing - Cirrus SR20 Pilot Operating Handbook

Cirrus Design
SR20

Tire Inflation

For maximum service from the tires, keep them inflated to the proper
pressure. When checking tire pressure, examine the tires for wear,
cuts, nicks, bruises and excessive wear.
To inflate tires:
1. Remove inspection buttons on wheel pants to gain access to valve
stems. It may be necessary to move airplane to get valve stem
aligned with the access hole.
2. Remove valve stem cap and verify tire pressure with a dial-type
tire pressure gage.
3. Serials 2016 thru 2240 before SB2X-32-21: Inflate nose tire to
40+/-2 psi (276 kPa) and main wheel tires to 62+2/-0 psi (427
kPa).
Serials 2016 thru 2240 after SB2X-32-21, 2241 & subs: The
LH and RH main wheel tire pressures must be within 20 psi of
each other to ensure the load is evenly distributed between
the main wheels.
4. Serials 2016 thru 2240 after SB2X-32-21, 2241 & subs: Inflate
nose tire to 40 - 90 psi (276 - 621 kPa) and main wheel tires to 62
- 112 psi (427 - 772 kPa).
5. Replace valve stem cap and inspection buttons.
All wheels and tires are balanced before original installation and the
relationship of tire, tube, and wheel should be maintained upon
reinstallation. In the installation of new components, it may be
necessary to rebalance the wheels with the tires mounted.
Unbalanced wheels can cause extreme vibration in the landing gear.

Propeller Servicing

The spinner and backing plate should be cleaned and inspected for
cracks frequently. Before each flight the propeller should be inspected
for nicks, scratches, and corrosion. If found, they should be repaired
as soon as possible by a rated mechanic, since a nick or scratch
causes an area of increased stress which can lead to serious cracks
or the loss of a propeller tip. The back face of the blades should be
painted when necessary with flat black paint to retard glare. To prevent
corrosion, the surface should be cleaned and waxed periodically.
P/N 21399-004 P/N 21399-004
Revision A1
Handling, Servicing, and Maintenance
• Caution •
Section 8
8-17 8-17