C-5FuelControl_TestInstruction.pdf

TO 2G-GTCP165-13-9

WP 005 00

9. TEST

NOTE

Unit shall be checked for leaks throughout entire testing section. If a leak is detected, stop testing immediately and repair leak.

Apply assembly fluid to all packings prior to installation.

Unless otherwise noted, fuel inlet pressure to be 5 ±0.5 psig.

9.1 Preparation

a. Test Equipment

1. See table 5 for test setup and equipment requirements.

9.2 Run-in Fuel Control

a. Run-In Unit Setup

1. After completing assembly of the pump, install packings

(figure 2, sheet 6, 150) onto filter plug (284769-1-1).

2. Install filter plug assembly (284769-1-1 & packing) into filter element bore with threaded side facing out.

3. Using alignment device 284793-1-1 to protect lip of seal

(figure 2, 135), press plate assembly (134, 135, 138, 139) into body (159) and secure with washers (137) and screws (136). Torque screws to 18-22 inch-pounds.

4. Install packing (41) on filter body (40). Install strainer element (42) in body (figure 2, sheet 6, 159). Install filter assembly (40, 41) with washers (39) and screws (38).

Torque to 38-45 inch pounds.

5. Install plug assembly (79001250-1) with packing (figure

2, sheet 4, 91). Secure with washer (figure 2, sheet 6,

110) and screws (109). Washer (110) is only required for outer screw. Torque to 32-38 inch-pounds

6. Install plug assembly (79001251-1) with packing (figure

2, sheet 4, 92). Secure with washers (101) and screws

(100). Torque to 32-38 inch pounds.

7. Install plug assembly (79001249-1) with packing (figure

2, sheet 6, 113). Secure with washers (figure 2, sheet 6,

110) and screws (109). Torque to 20-25 inch pounds.

8. Install plug assembly (79001252-1) with packings

(figure 2, sheet 1, 36 & 37). Secure with washer (3) and screws (2). Torque to 23-28 inch-pounds

9. Install adjusting screw assembly (figure 2, sheet 3, items

59-62) into body (159).

10. Install plug assembly (79001253-1) with packings

(figure 2, sheet 3, 47, 48, 49). Secure with plug (43).

11. Install plug and packing (figure 2, sheet 1, 11 & 12) into governor discharge port (figure 24).

12. Install plug (AN814-4DL) and packing (S9412-504) into control discharge port (figure 24)

13. Install plug (79001254-1) into schedule ΔP valve adjustment port (figure 24).

b. Stand Installation

1. Install adapter plate assembly (102187-51-5) on to test stand (figure 1, 2).

2. Install adapter plate (102187-58-1) on to test stand.

3. Install shaft adapter 201225109.

4. Install packing (S9412-033) on body (figure 2, 159).

5. Install fuel control unit assembly on stand to interface plate adapter (102187-58-1).

6. Secure fuel control assembly to stand using clamp (4268-

268). Torque to 20±2 in-lb.

7. Setup stand according to figure 22a.

c. Bleed fuel control

1. Open valve in line connected to governor discharge port

(figure 24, 6).

2. Supply fuel (46-18) to fuel inlet port (figure 24) at 5

(±.5) psig. Bleed unit until continuous flow is noted from governor discharge port (figure 24).

3. Close valve in line connected to governor discharge port

(figure 24, 6).

d. Pump Run-in Test

WARNING

Open back pressure valve (figure 22a) between operations to prevent injury to personnel and damage to equipment.

1. Perform pump run-in test as outlined in Figure 25.

Slowly vary backpressure valve in order to obtain pump discharge pressures on run sheet.

2. Following completion of all pump run-in steps, slowly bring fuel control to a stop and set all values to 0 on test stand.

9.3 Pump Capacity

NOTE

Run in and capacity check are accomplished in the same test setup.

a. Pump Capacity Test

Open back pressure valve (figure 22a) between operations to prevent injury to personnel and damage to equipment.

1. Run pump capacity check as outlined in Figure 25.

Slowly vary backpressure valve in order to obtain pump discharge pressures on run sheet.

2. If limits are not met, inspect packing (figure 2, sheet 6, item 150) on plug assembly (284769-1-1) before disassembling pump section for repair.

3. Following successful completion of test run relieve discharge pressure by opening back pressure valve and decrease drive shaft speed to zero. Then set all other values to zero on stand. Remove fuel control unit from test stand

4. Remove screws (figure 2, sheet 6, 136) and washers

(137). Remove plate assembly (134, 135, 138, 139) by using working bolts (figure 2, sheet 4, item 70). Remove filter plug 284769-1-1 from filter bore using a working bolt (MS16997-23)

5. Install strainer element assembly (148) by following instructions below.

(a) Place strainer element (148) without packing (figure

2, sheet 6, item 150) into small filter bore with threaded side of plug facing out to allow for future extraction.

(b) Place depth micrometer on top of fuel control body

(159) and measure to the top of the strainer element

(148). Record as dimension A.

(c) Measure to the base of the fuel control body (159).

Record as dimension B.

(d) Subtract dimension B from dimension A. The result shall be called dimension C.

Formula: A-B=C

(e) Dimension C will be the required thickness of shims

(149).

(f) Remove strainer element (148) and install packing

(150).

(g) Reinstall strainer element (148).

(h) Install required shims calculated by dimension C with a tolerance of ±.005.

(i) Using alignment device 284793-1-1 to protect lip of seal (figure 2, 135), press plate assembly (134, 135, 138, 139) into body (159) and secure with washers

(137) and screws (136). Torque screws to 18-22 inch-pounds.

9.4 High Pressure Relief Valve Setting

ΔP valve governor adjustments not required for this test, only required to hold spring in ΔP valve assembly.

Leave in an adjust screw (figure 2, sheet 3, 59-62) as part of test fixture.

The relief valve cracking pressure may be determined by slowly increasing the pump discharge pressure until a sudden pressure drop is observed and the fuel flow increases significantly. The point of highest pressure just prior to the drop is the relief valve cracking pressure.

CAUTION

Do not exceed discharge pressure of 700 psig. Do not operate fuel control unit more than 10 seconds with relief valve fully closed.

Prior to running, ensure shutoff valve is never closed during this test. Failure to open shut off valve may cause severe damage to personnel or equipment.

a. Test Setup

1. Remove the governor ΔP valve assembly (Figure 2, Sheet 3, 43 through 58) from fuel control unit.

2. Assemble the governor ΔP valve assembly (43 through

58) in 265213 or 296243-1 test fixture (Figure 27) prior to testing.

3. Setup valve according to figure 27a.

b. Test

1. Fully open back pressure valve (figure 27a) if installed.

2. Test the assembly in accordance with requirements of fuel control data sheet (Figure 25). Fuel control unit must meet these requirements.

3. If pressure relief valve fails, add washers (Figure 2, sheet

3, 54) under guide (52) to increase cracking point if under limits. Remove washers (54) to decrease pressure.

4. If adjustments are made, retest pressure relief valve.

5. If capacity requirements are not achieved, select springs

(P/N 892991-1 or 892991-2) as necessary to meet requirement.

6. Remove governor ΔP valve assembly (43 through 58) from test fixture (P/N 296243-1) and install back into fuel control unit.

7. Finish building up fuel control unit per assembly section.

9.5 Main Test Setup

This test setup applies all remaining tests outlined in the testing section of this TO.

a. Install adapter plate assembly (102187-51-5) on to test stand

(figure 1, 2).

b. Install adapter plate (102187-58-1) on to test stand.

c. Install shaft adapter 201225109.

d. Install packing (S9412-033) on body (figure 2, 159).

e. Install fuel control unit assembly on stand to interface plate adapter (102187-58-1).

f. Secure fuel control assembly to stand using clamp (4268-

268). Torque to 20±2 in-lb.

g. Make all connections according to figure 22.

9.6 Torque Motor Check

a. Resistance

1. Check resistance between each of the indicated pins outlined in figure 25. Each set (1 and 4, 2 and 3) shall not be more than 5 ohms from each other.

2. If resistance does not meet the requirements replace torque motor or route for repair.

b. Short Check Test

1. Check the torque motor for proper wiring connections by using multimeter. Touch one end of terminal lead to pin

5 and the other terminal lead to case of torque motor or connector case. Multimeter shall show a closed or grounded connection.

2. Check pins 1 through 4 with case to ensure an open circuit.

3. If torque motor does not meet these requirements, replace torque motor or route for repair.

9.7 Secondary Tests

Torque Motor Testing, Minimum Flow Valve Setting, Governor Flow Setting, and Fuel Schedule Sea Level shall be performed in harmony with each other in any sequence. Requirements of all four sections must be met before progressing to calibration check. Once requirements of each of the four are met, record values.

a. Torque Motor Polarity & Range Test

For initial torque motor adjustment, turn proportional fuel flow adjustment (governor) screw (Figure 24) clockwise until it bottoms out then back out 1 turn counterclockwise and tighten nut to prevent damage to torque motor pivots.

Turn off pins 1 and 4 when pins 2 and 3 are activated.

Turn off 2 and 3 when pins 1 and 4 are activated.

1. Proportional Fuel Flow Setting Test

(a) Set up circuit as outlined in figure 23

(b) Operate fuel control unit in accordance with settings as outlined in figure 25.

(c) If flow is not achieved, adjust proportional fuel flow adjustment screw (figure 24) to attain requirement.

(d) Tighten nut after adjustment has been made.

2. Polarity Test

(a) Operate fuel control unit and run polarity check as outlined in figure 25.

(b) Apply 24 ± 6 Vdc to pin 1+ and pin 4-.

(c) Start current at 0 and slowly increase current to 260 mA ensuring that flow increases as current increases.

(d) Set current back to zero and turn off pin 1+ and 4-.

(e) Apply 24 ± 6 Vdc to pin 2- and pin 3+

(f) Start current at 0 and increase to 260 mA to verify flow increases.

(g) Decrease current back to zero and turn 2- and 3+ switch to off position.

(h) If flow does not increase, replace torque motor or route for repair.

3. Torque Motor Range Test

(a) Operate fuel control unit in accordance with settings as outlined in figure 25.

(b) Apply 260 mA across each pin set indicated in figure 25.

(c) Adjust schedule ΔP pressure regulator as required to achieve above stated requirements.

(d) If unit fails, try the following in the outlined order:

(1) Check governor flow setting and adjust as necessary.

(2) If flow is still less than values indicated in figure 25, remove shims (Figure 3, sheet 6,

112) between the torque motor housing and main fuel control body. If values are higher than required, add shims.

(3) Change the governor spring (114) to a higher spring rate.

(4) Add or remove shims (figure 22, 16) between governor slide valve (119) and ball bearing

(117). Adding shims will decrease flow, remove to increase.

(5) Replace torque motor.

b. Minimum Flow Valve Setting

1. Operate fuel control unit in accordance with settings as outlined in figure 25.

2. Adjust minimum flow valve (figure 24) to achieve fuel flow required.

c. Governor Flow Setting outlined in figure 25.

2. Make adjustments to the governor ΔP valve as necessary to meet requirements.

3. Add or remove shims (figure 22, 16) between governor slide valve (119) and ball bearing (117). Adding shims will decrease flow, remove to increase.

d. Fuel Schedule Valve Setting

1. Fuel Schedule Adjustment

The ΔP value limits are initial starting values only and are to be used to get the fuel control unit to initial settings in preparation for subsequent tests.

Adjustments outside of these limits may be required to ensure the fuel control performs within all mandatory limits

(a) Operate fuel control in accordance with settings as

(b) Make adjustments as necessary to the scheduling

ΔP valve (figure 24) to meet differential pressure on schedule ΔP gage (figure 22) of 21 ± 3 psid.

(c) Make adjustments as necessary to governor ΔP valve (figure 24) to meet differential pressure on governor ΔP gage (figure 22) of 43 ± 4 psid.

2. Fuel Schedule Sea Level Test

(a) Run fuel schedule sea level as shown in figure 25.

(b) Adjust scheduling ΔP valve and/or schedule valve

(figure 24) as necessary to meet requirements.

These adjustments shall be made in a repeated manner between the operating conditions associated with the 3000 and 5000 rpm points of the sea level schedule.

(c) For all units excluding fuel control unit 698395-7:

(1) If low speed flows are not achieved and the reduced flows are meeting the figure 25 requirements, less than 3 psi, remove shims

(S8154-88C) from below the ΔP bellows.

Remove a maximum of 0.008 inch shims as necessary.

(d) For 698395-7 fuel control unit:

(1) If low speed flow points are low, adjust schedule valve adjustment screw (figure 24)

CW to increase flow.

(2) Also permissible to adjust the stem (figure 2, sheet 4, 87) located inside the acceleration piston CCW to increase the flow.

(3) If above steps fail, adjust scheduling ΔP valve

(figure 24). Turn CW to increase flow.

9.8 Fuel Schedule Min. Stop Adjustment

1. Test the fuel control unit in accordance with figure 25

2. Make adjustments to minimum schedule stop adjustment to obtain the fuel flow specified in figure 25.

9.9 Fuel Schedule Altitude Run Test

1. Perform Fuel Schedule Altitude Run Test as outlined in figure 25.

2. Adjust scheduling differential pressure valve (figure 24) as needed to obtain values.

9.10 Altitude Check

outlined in table 25.

9.11 PCD Maximum Schedule Stop Setting

Compressor discharge pressure is not to exceed 74.7 psia or damage to bellows may occur.

2. Make adjustments to maximum schedule stop adjustment screw (figure 24). Adjust screw in until a decrease in flow is observed then back screw out ¼ to ½ turn and lock into place.

9.12 Maximum Sea Level Droop Point

2. If the requirement in figure 25 cannot be met, reset the altitude schedule to the high side of the tolerance band and repeat.

3. If requirements cannot be met by adjusting schedule ΔP pressure regulator, increase the governor gain by changing the governor spring (figure 2, sheet 6, item

114), and/or torque motor (111), and/or flyweights (121).

9.13 Governor Gain & Hysteresis

1. Gain Test

(a) Operate fuel control unit in accordance with settings as outlined in figure 25.

2. Hysteresis Test

(a) Operate fuel control unit in accordance with settings as outlined in figure 25.

(b) Start at 6400 rpm and slowly increase speed until the fuel flow reaches 190 lb/hr and record speed.

(c) Increase speed by 100 rpm then slowly decrease the speed until the fuel flow reaches 190 lb/hr again and record speed.

(d) Subtract the second speed indicated from the first.

The difference between the two shall be less than 50 rpm’s.

(e) If hysteresis does not meet requirements, repeat gain test procedures twice and then repeat hysteresis test. Temperature of fuel control must be close between both tests whereas this will vary results.

(f) If requirements still are not met, change governor spring to higher rate and re-run governor and torque motor checks. If this fails, reject fuel control unit and have flyweights and sleeve checked for excessive wear or rough surfaces.

9.14 Final Check Post-Calibration

a. Final Check Post-Calibration Test

The relief valve cracking pressure may be determined by slowly increasing the pump discharge pressure until a sudden pressure drop is observed or a large increase in flow is observed. The point of highest pressure just prior to the drop in pressure is the relief valve cracking pressure.

Pump discharge pressure of 700 psig shall not be exceeded when opening relief valve. Also, do not run unit for more than 10 seconds with the relief valve fully closed. Damage to unit may occur.

2. Slowly close back pressure valve until relief valve opens.

3. Close back pressure valve (figure 22) once relief valve opens. Record pressure obtained.

4. If maximum back pressure is exceeded, remove relief valve and perform high pressure relief valve setting test again.

b. Back Pressure Sensitivity Test

1. Operate fuel control unit in accordance with settings as outlined in figure 25.

2. Close the nozzle shutoff valve slowly to set pump discharge pressure to requirement outlined .

3. Record data.

4. If unit fails minimum flow rate, unit fails for a defective pump section.

c. Repeat Torque Motor Range Test

1. Repeat torque motor range test as indicated previously.

d. Repeat Governor Gain and Hysteresis Check

1. Repeat governor gain and hysteresis check as indicated previously

9.15 Preservation and Lockwire

a. If the fuel control unit is to be shipped as a spare part or stored for 10 days or more, the fuel control unit shall be preserved by disconnecting all fuel and air lines and providing drain lines.

b. Supply oil (13-50) to the fuel inlet port (Figure 24).

c. Drive the input shaft at a speed of 200 to 500 rpm until clear oil flows from the control discharge fitting and all fittings.

d. Drain all oil from the fuel control unit and plug all fittings, some residual oil is allowed.

e. Apply thin coat of assembly fluid (13-13) on packing

(Figure 2, Sheet 6, 133).

f. Install packing (133) and ring (132) on gear set (142).

g. Lockwire plug (Figure 2, Sheet 1, 9) to plug (11) using lockwire (13-42).

h. Lockwire nut (13) to retainer (15) using lockwire (13-

42).

i. Lockwire nut (Figure 2, Sheet 3, 59) to nut (Figure 2, Sheet 4, 94) using lockwire (13-41).

j. Lockwire nut (63) to nut (68) using lockwire (13-41).

k. Lockwire screws (Figure 2, Sheet 6, 109) using lockwire (13-41).

l. Preserve and package fuel control unit in accordance with specification MIL-P-116, Method III.

Table 5 - Test Setup and Equipment Requirements

Item Description Remarks

Test Stand Must meet all testing requirements and provide secure mount for fuel control unit during testing. Unit shall be mounted with the filter bore down. Test stand shall be safe to the operator.

Fuel Specification MIL-F-7024, Type II calibration fluid, filtered supplied to the fuel inlet port.

Maintain inlet fuel temperature between 70-85°F (21-29°C)

Air Clean and filtered air regulated to 60 (±1) psig maximum.

Required for the simulation of the compressor discharge pressure from the APU.

Lubricant Specification MIL-L-6081, Grade 1005 or

1010 oil

Required for preservation

Variable Speed Drive Drives input shaft of fuel control unit 600-7000 rpm (±5) Shall rotate clockwise when viewed from the input shaft end.

Atomizer Simulator Assembly Shall conform to requirements and items outlined in figure 26 or figure 26a.

Flow Divider As outlined in figure 22 per part number

384284-1

Shutoff Simulator Hand valve or orifice with pressure drop of

4 (±0.5) psig at flow of 120 (±10) pph

Required to simulate pressure drop associated with the fuel shutoff solenoid on the APU.

Back Pressure Valve Used to create pump discharge pressure for pump run in & capacity tests and high pressure relief valve tests.

Enrichment Orifice Orifice diameter shall be 0.029-0.032 inches for fuel control unit part number

698395-6.

Orifice diameter shall be 0.058-0.062 inches for fuel control unit part number

698395-7

Required for enrichment system simulation outlined in figure 22

Electrical Power 24-28 Vdc Required for torque motor operation outlined in figure 23.

Figure 26a Atomizer Simulation Requirements

Inlet Pressure

±1 psig

Required Fuel Flow

(lb/hr)

50 26.3-30.3

100 36.0-40.0

150 43.9-47.9

200 50.6-54.6

250 56.7-102.0

300 62.0-418.0

350 66.0-452.0

400 142.0-478.0

Figure 27a Setup for Crack Discharge Pressure

Fuel

Reservoir

Fuel Pump 0-1500 psig 0-1500 pph Shutoff

Valve (optional)

Pressure Gage

Figure 25 Run Sheet

P/N: 698395-_________________________________ S/N: _____________________________

Technician: _________________________________ Date: ____________________________

Par.

No. Test

Fuel Inlet (psig)

Drive Speed (rpm)

Pump Discharge

Pressure (psig) Cycle Time (minutes) Cycles Fuel Flow (pph)

9.2.d Pump Run-In

5 ± 0.5 650 ± 50 25 ± 1

5 ± 1

5 ± 0.5 650 ± 50 100 ± 5

5 ± 1

5 ± 0.5 1000 ± 100 200 ± 10

5 ± 1

5 ± 0.5 3000 ± 100 300 ± 20

5 ± 1

5 ± 0.5 6500 ± 100 300 ± 20

5 ± 1

5 ± 0.5 6500 ± 100

Cycle from 300 to 400

Hold at 400 (± 10)

30 sec min

5 ± 0.5 6500 ± 100

Cycle from 350 to 500

500 (± 10)

30 sec min

5 ± 0.5 6500 ± 100

Cycle from 450 to 600

600 (± 10)

30 sec min

5 ± 0.5 6500 ± 100

Cycle from 550 to 650

650 (± 10) 30 sec min

9.3.a Pump Capacity

5 ± 0.5 650 ± 5 25 ± 1

100 min

5 ± 0.5 650 ± 5 150 ± 2

60 min

5 ± 0.5 6500 ± 10 100 ± 2

1225 min

5 ± 0.5 6500 ± 10 300 ± 4

1150 min

9.4.b High

Pressure Relief Valve

Leakage 150 ± 10

20 max

Crack Pr.

600 ± 50

Leakage 150 ± 10

20 max

Capacity 700 max

1300 min

Note: All lines provided below values are for recording data

Figure 25 Run Sheet Continued

Par.

No. Test Coil Pins Ohms Accept Reject

9.6 Torque Motor Checks

Resistance

(a) 1 to 4 50 ± 3

(b) 2 to 3 50 ± 3

Resistance Difference

(a) – (b)

Less than 5 ohms

Short Check

Coil Pins Circuit Accept Reject

Pin 5 to case Ground

Pin 1 through 4 to case

Open

Par.

No. Test Fuel Inlet (psig)

Drive Speed (rpm)

Compressor Discharge Pressure

(psia)

Nozzle Discharge Chamber Pressure

(psia)

Drain Port Pressure (inHgA)

Enrichment Orifice

Torque Motor

Current (mA)

Fuel Flow (pph)

9.7.a.1 Proportional

Fuel Flow Setting

5 ± 0.5 6500 ± 5 69.7 ± 1.0 69.7 ± 1.0 Ambient Open 0 190 ± 5

9.7.a.2 Torque Motor

Polarity

1+, 4-

5 ± 0.5 6500 ± 5 69.7 ± 1.0 69.7 ± 1.0 Ambient Open 0-260

Increase

2-, 3+ Increase

9.7.a.3 Torque

Motor Range

1+, 4-

5 ± 0.5

6500 ± 5

69.7 ± 1.0 69.7 ± 1.0 Ambient Open

390 min

2+, 3- 6500 ± 5 260 100 max

2+, 3- 6565 ± 5 260 60 max

9.7.b Minimum Flow Valve

Setting 5 ± 0.5 6800 ± 10 40 ± 1.0 40 ± 1.0 Ambient Open 0

35 ± 3

9.7.c Governor

Flow Setting 5 ± 0.5 5850-6000 69.7 ± 1.0 69.7 ± 1.0 Ambient Open 0

395-430

Figure 25 Continued

No. Test

Fuel Inlet (psig)

Drive Speed

(rpm) ± 5

Compressor Discharge Pressure

(psia)

Nozzle Discharge Chamber Pressure

(psia)

Drain Port Pressure (inHgA)

Enrichment Orifice

Torque Motor Current (mA)

Fuel Flow (pph)

9.7.d.1 Fuel

Schedule Adjustment

5 ± 0.5 5800 69.7 ± 1.0 69.7 ± 1.0 Ambient Closed 0

9.7.d.2

Fuel Schedule Sea Level

Test

5 ± 0.5

650 14.7 ± 0.1 14.7 ± 0.1

29.9 ± 0.1

Closed

45 ± 5

1000 14.7 ± 0.1 14.7 ± 0.1 0 60 ± 5

2000 16.7 ± 0.1 16.7 ± 0.1 0 80 ± 10

3000 22.9 ± 0.1 22.9 ± 0.1 0 105 ± 15

4000 33.7 ± 0.1 33.7 ± 0.1 0 180 ± 15

5000 49.9 ± 0.1 49.9 ± 0.1 0 280 ± 15

5500 57.5 ± 0.1 57.5 ± 0.1 0 300 min

5850-

69.7 ± 0.1 69.7 ± 0.1 Open 0 395-430

9.8

Fuel Schedule Altitude

Adjustment

5 ± 0.5 3000 10 ± 1.0 10 ± 1.0 8.9 ± 0.1 Closed 0 81 ± 15

9.9 Fuel

Schedule Altitude Test

5 ± 0.5

10 ± 1.0 10 ± 1.0 8.9 ± 0.1 Closed

45 ± 5

1000 0 60 ± 5

2000 0 75 ± 15

3000 0 81 ± 15

4000 0 91 ± 15

5000 0 115 ± 20

6000 0 158 min

9.10 Altitude Check

5 ± 0.5 6500 10 ± 1.0 10 ± 1.0 8.9 ± 0.1 Open 260 to 1+, 4- 227 min

Figure 25 Continued

No. Test Fuel Inlet (psig)

Drive Speed (rpm)

Compressor Discharge Pressure

(psia)

Nozzle Discharge Chamber Pressure

(psia)

Drain Port Pressure (inHgA)

Enrichment Orifice

Torque Motor Current (mA) Fuel Flow (pph)

9.11

PCD

Maximum Schedule

Stop Setting

5 ± 0.5 6500 ± 5 74.6 ± 0.1 74.6 ± 0.1 Ambient Closed 260 to 1+, 4-

9.12 Maximum Sea Level

Droop 5 ± 0.5 6500 ± 5 52 ± 0.5 52 ± 0.5 29.9 ± 0.1 Open 260 1+, 4-

285 min

9.13.

Governor Gain

5 ± 0.5

6400 ± 10

65 ± 5 65 ± 5 Ambient Open

255-345

6450 ± 10 0 220-270

6500 ± 10 0 185-195

6550 ± 10 0 110-160

6600 ± 10 0 35-125

9.13.

Governor Hysteresis

5 ± 0.5

(a) rpm

65 ± 5 65 ± 5 Ambient Open

(a) + 100 rpm

0 _________

(b) rpm

(a) – (b) = 50 rpm max

No. Test Fuel Inlet (psig)

Drive Speed (rpm)

Compressor Discharge Pressure

(psia)

Nozzle Discharge Pressure

(psia)

Drain Port Pressure (inHgA)

Enrichment Orifice

Torque Motor

Current (mA)

Governor Discharge Pressure

(psig) Accept Reject

9.14.a

Final Check Post-

Calibration Test

Crack Pr.

5 ± 0.5 6500 ± 20 60 ± 5 60 ± 5 Ambient Closed

600 ± 50

Capacity 0 700 max

9.14.b Back

Pressure Sensitivity

5 ± 0.5 6500 ± 10 55 ± 1 55 ± 1 Ambient Open 260 to 1+, 4-

400 ± 10

Fuel Flow (pph)

330 min

9.14.c

Torque Motor Range

Recheck

Accept Reject

9.14.d

Governor Gain &

Hysteresis Recheck

External Leakage

None permitted during testing.