[PDF] BAC 1-11 Fueling Procedures Introduction The Bac 1-11 Model

1-11 Model 200 fuel system is designed for high rate pressure fueling and defueling The refueling circuitry Secure fuel panel and disconnect from aircraft Alternate Refueling 



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BAC 1-11 Fueling Procedures Introduction The Bac 1-11 Model

1-11 Model 200 fuel system is designed for high rate pressure fueling and defueling The refueling circuitry Secure fuel panel and disconnect from aircraft Alternate Refueling 







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BAC 1-11 Fueling

Procedures

Introduction

The Bac 1-11 Model 200 fuel system is designed for high rate pressure fueling and defueling. The refueling circuitry is interconnected with the fuel quantity indicating system enabling automatic load control for refueling and defueling . Fuel servicing may also be accomplished manually or by gravity fueling (overwing).

Normal (Auto) Fueling

Position and ground refueler. Connect single point nozzle to fuel connection located at the root end of the right wing under the leading edge and open the-fuel load control panel cover. Refer to Figure 2. Normal refueling procedures are outlinedin Figure 3. NOTE: To dial preselector the knob must be depressed. The amount of fuel onboard may be determined by dialing the preselector pointer slightly above and below the fuel quantity level. Fuel quantity is indicated by green light going on and off.

BAC 1-11 AUTOMATIC REFUELING

FIGURE 2

Fueling Procedures BAC 1-11 (Continued)

1. Master switch "ON" ------------------ "POWER ON" light comes on

2. Manual/auto switches "AUTO----------- Enables "AUTO FUELING"

3. Refuel/defuel switches "REFUEL--------- Arms refuel valves.

4. Position preselector knob -----------------Determine fuel quantity on board.

RECORD FUEL QUANTITY ON FUEL SLIP.

5. Depress and rotate preselector ----------- To desired fuel load.

6. Operate deadman-control ---------------Begin fueling aircraft.

7. Green lights go off ---------------------When fuel reaches selected load and refuel

valves close automatically. ASSURE PROPER LOAD IN EACH TANK. MAXIMUM ALLOWABLE UNBALANCE

IS 1000 LBS.

8. Return all switches to off.

9. Secure fuel panel and disconnect from aircraft.

Alternate Refueling Procedures

The following procedure may be used for fueling should the load control or fuel quantity system be inoperative. Each tank should be filled separately from the single point or overwing refueling connector when maximum capacity i s required.

1. Master power switch "ON"--------------------- Power light comes "ON"

2.. Manual/Auto switches "MANUAL"---------- Enables manual fueling

3. Left or right, refuel/defuel----------------------- Opens refuel valve

switch to refuel

4. Magna-stick* wing tank------------------------- Record inches on fuel slip

5. Operate deadman -------------------------------- Begin fueling

MONITOR MAGNA-STICKS AND REFUELER FLOWMETER.

6. Release deadman --------------------------------- At desired load

7. Repeat steps 3, 4, 5, for remaining tank

ASSURE PROPER LOAD. MAXIMUM UNBALANCE IS1000 LBS.

8. Shut off switches --------------------------------- Secure panel

*Magna-stick operating procedures included in this section.

Defueling

BAC 1-11 defueling with or without load control requires the same procedures as refueling except "DEFUEL" is selected on individual tank refuel/defuel switches.

How to Use Magna-Sticks

If the fuel quantity gauges are inoperative or there is a doubt about the accuracy of the gauges you must check the fuel load using magna sticks. A brief description of how to use magna sticks, attitude monitor, and charts is necessary before you are able to manually fuel. There are eight Magnetic Fluid Level Indicators (Magna Sticks) on the BAC 1-11 (four for each tank). Facing forward see Figure 4.The left wing tank has magna sticks 1 through 4, and right wing tank ha3 magna sticks 5 through 8. These Sticks are calibrated in 1-inch increments. Each stick measures up to a definite quantity in that tank as follows:

PoundsSticks Used

0 to 4,000 lbs.4 and 5

4,000 to 7,000 lbs.3 and 6

7,000 to 8,000 lbs.2 and 7

8,000 to full1 and 8

Check the amount of fuel on board by using the two outermost sticks (1 and 8) first and move inward until a reading is obtained. Most ramps are sloped to allow for water drainage. In addition aircraft struts (main and nose gear) extension are different on each aircraft. This means the aircraft is almost always leaning either to one side or the other or to the nose or tail. If you take half a glass of water and tilt it to one side, the glass appears full on one side and almost empty on the other. This same principle applies to the airplane on the ramp. If the aircraft is leaning more to the left side, the stick reading on the left is going to read higher than what is actually in the tank. BAC 1-11 aircraft have an attitude monitor on the fuel load control panel which provides a means of correcting the leaning of the aircraft. This monitor divides the aircraft in sections along the fuselage and across the wings as shown in Figure 5.

ATTITUDE MONITOR DESCRIPTION

Figure 5

The attitude monitor is similar to a carpenter's level. When the bubble is in the center of the

level, he knows the surface is level. If the bubble is to the left or right of center, he adjusts his

work until it is level. The attitude monitor on the BAC 1-11 is your level. The attitude monitor is broken down in the same way with grid lines similar to a checkerboard. The top grid lines are numbered 1 through 7 (tail-to-nose balance) and sides lettered A through G (wing-to-wing balance). Read the monitor letter and number where bubble appears. Refer to figure 5. The Attitude Correction Charts are your calculating machine. They interpret all your readings into actual fuel on board the aircraft. Each chart is identified by the Attitude Letter Readings (A,

B, C, etc.)

All attitude monitor letter readings have similar charts. Since other monitor letter readings mean the aircraft is leaning, the other Attitude Correction Charts are broken down into left and right tanks. Example: Assume the Attitude Monitor Reading is B5 and you obtained a stick reading on sticks

3 and 5. The inch reading on stick 3 is 7 inches and stick 5 is 17 inches. The fuel in each tank is:

- Left tank (stick 3) 7,100 lbs. - Right tank (stick 5) 5,700 lbs.quotesdbs_dbs50.pdfusesText_50