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737-300/400/500MAINTENANCE MANUAL
(f) Operate the autopilot servos:
1) Engage one autopilot channel.
2) Engage vertical speed mode.
a) Select vertical speed of 2000 fpm.
NOTE: Wait for the column motion to stop.
____
b) Select vertical speed of -2000 fpm.
NOTE: Wait for the column motion to stop.
____
3) Engage heading select mode. a) Select 30 degree heading change to the left of the airplane heading.
NOTE: Wait for wheel motion to stop.
____
b) Select 30 degree heading change to the right of the airplane heading.
NOTE: Wait for wheel motion to stop.
____
4) Repeat steps 1 thru 3 for the other two autopilot channels.
S 863-048
(9) At temperatures below -22°F (-30°C) push the brake pedal (8) times immediately before the engines are operated. Make sure that the brake pistons entend and retract correctly at the landing gears.
(a) If brake operation is not normal, do these steps: 1) Provide local warming to the brake. 2) Repeat the test until proper operation is observed. 3) If the difficulty persists, replace the brake (AMM
(AMM 32-41-41/401).
S 203-049
(10) Inspect the wheel wells for ice/snow/slush on the Alternate Landing Gear System Components. Clear as necessary.
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S 603-080
(11) Fill the CSD or VSCF Generator/Converter with oil as required (AMM 12-13-21/301).
NOTE: If the CSD or VSCF Generator/Converter is serviced for
____ cold weather operation, use the preferred oil, MIL-L- 7808 instead of MIL-L-23699 lubricant. The only MIL-L-7808 lubricant approved for Sundstrand IDGs is Exxon 2389.
S 213-051
(12)
Visually check the wing lower surface for fuel leaks.
S 213-052
(13)
Visually check the landing gear.
(a) Wipe the inner cylinder with a clean cloth to check for hydraulic leakage from the seals.
S 213-053
(14)
Check the tire pressure and inflate the tires as required (AMM 12-15-51/301).
S 213-054
(15)
Check the main gear shock strut and service as required (AMM 12-15-31/301).
S 213-055
(16)
Check the nose gear shock strut, and service as required (AMM 12-15-41/301).
S 863-056
(17)
When adding fuel, use these requirements:
(a) Make sure the fuel temperature is at least 6°F (3°C) above the fuel freeze point or -45.4°F (-43°C), whichever is higher. Use the ASTM method to determine the freeze point.
NOTE: The Fuel Quantity Indicator on the wing fuel station can
____ indicate slowly or not show numbers in extreme cold conditions. Use an external fuel flow meter to show the amount of fuel added to the airplane.
1) Use fuels that meet specification ASTM D1655; or
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2) Use fuels that meet specification GOST 10227: a) RT (PT, Russian spelling) b) TS-1 (TC-1, Russian spelling)
(b) Approved fuel additives are:
NOTE: Adding an anti-icing fuel additive may help in the
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