Enter minimum or maximum speed restriction for RTA navigation in lines 2, 3, or 4 depending on phase of flight. Observe RTA parameters change to reflect new limits (RTA PROGRESS page) and EXEC key illuminated.
EXEC key ........................................................................................ Push Observe MOD PERF LIMITS page change to ACT PERF LIMITS page.
Note: Entered restrictions on line 2, 3 and 4, also restrict other
navigation modes such as ECON.
Entering New Time Error Tolerances For RTA Navigation
PERF LIMITS page ....................................................................... Select
Enter desired time error tolerance (6 to 30 seconds) for the RTA waypoint on line 1L (Example: 25). Observe MOD PERF LIMITS page displayed and EXEC key illuminated.
EXEC Key........................................................................................ Push Observe the ACT PERF LIMITS page displayed.
Copyright . The Boeing Company. See title page for details.
SP.11.20 December 3, 2004
737 Operations Manual
Fuel Balancing
If a fuel leak is suspected:
Accomplish the ENGINE FUEL LEAK Checklist.
Maintain main tank No. 1 and No. 2 fuel balance within limitations.
Note: Fuel pump pressure should be supplied to the engines at all
times. At high altitude, without fuel pump pressure, thrust deterioration or engine flameout may occur. If the center tank contains fuel: Center tank fuel pump switches .................................................. OFF Crossfeed selector.......................................................................Open Fuel pump switches (low tank) ................................................... OFF When quantities are balanced: Fuel pump switches (main tank) ..............................................ON Center tank fuel pump switches ...............................................ON Crossfeed selector ................................................................ Close If the center tank contains no fuel: Crossfeed selector.......................................................................Open Fuel pump switches (low tank) ................................................... OFF When quantities are balanced: Fuel pump switches..................................................................ON Crossfeed selector ................................................................ Close
Supplementary Procedures -Fuel 737 Operations Manual
Refueling Fuel Load Distribution
Main tanks No. 1 and No. 2 should normally be serviced equally until full. Additional fuel is loaded into the center tank until the desired fuel load is reached.
Note: Main tanks No. 1 and No. 2 must be scheduled to be full if the center tank contains more than 1000 pounds (453 kilograms) of fuel. With less than 1000 pounds (453 kilograms) of center tank fuel, partial main tank fuel may be loaded provided the effects of balance have been considered.
Fuel Pressure
Apply from a truck or fuel pit. A nozzle pressure of 50 psi provides approximately 300 U.S. gallons/1136 liters per minute.
Normal Refueling
When a full fuel load is required, the fuel shutoff system closes the fueling valves automatically when the tanks are full. When a partial fuel load is required, the fuel quantity indicators are monitored and the fueling valves are closed by manually positioning the fueling valve switches to CLOSED when the desired fuel quantity is aboard the airplane.
Refueling with Battery Only
When the APU is inoperative and no external power source is available, refueling can be accomplished as follows:
Battery switch ............................................................................... ON
Standby power switch ..................................................................BAT
The battery operates the entire fueling system normally, including the gages and fuel shutoff system. The only limitation during this type of operation is the battery life.
Refueling with No AC or DC Power Source Available
When it becomes necessary to refuel with the APU inoperative, the
aircraft battery depleted, and no external power source available,
refueling can still be accomplished:
Fueling hose nozzle ................... Attached to the refueling receptacle
Copyright . The Boeing Company. See title page for details.
SP.12.2 June 8, 2001
Supplementary Procedures -Fuel 737 Operations Manual
Fueling valves ................................ Open for the tanks to be refueled
Note: Main tanks No. 1 and No. 2, and the center tank refueling valves each have a red override button that must be pressed and held while fuel is being pumped into the tank. Releasing the override button allows the spring in the valve to close the valve. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300机组操作手册Flight Crew Operations Manual FCOM 1(70)
