(4)
Remove the electrical power (AMM 24-22-00/201).
TASK 29-22-00-735-002
3. PTU System Test
_______________
A. Standard Tools and Equipment
(1)
Ground Service Cart - capable of 20 gpm at 3000 psi.
(2)
Stopwatch
B. References
(1)
AMM 12-12-00/301, Hydraulic Reservoirs
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 29-09-00/201, Hydraulic Reservoir Pressurization System
(4)
AMM 29-15-00/201, Hydraulic System A, B and Standby
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(5)
AMM 29-22-11/401, Power Transfer Unit (PTU)
(6)
AMM 29-22-21/201, PTU Pressure Filter Module
(7)
AMM 71-00-00/201, Power Plant
C. Access
(1) Location Zone
101, 102 Control Cabin
216, 217 Main Wheel Well
D. Prepare for the Test
S 615-066
(1)
Fill the hydraulic reservoirs if the fluid level is below RFL (AMM 12-12-00/301).
S 865-023
(2)
Supply the electrical power (AMM 24-22-00/201).
S 865-024
(3)
Make sure the two Stall Warning Vanes (Alpha Vanes) are at the zero position.
S 865-025
(4)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6-2 Panel
1) PTU/LG BYP V CONT - 1
2) NOSE GEAR AIR/GND
(b)
P6-11 Panel
1) STBY HYD PUMP NORMAL
(c)
P6-12 Panel
1) STBY HYD PUMP (ALTERNATE)
S 865-026
(5) Make sure these circuit breakers are closed:
(a) P6-2 Panel
1) FLIGHT CONTROL SHUTOFF VALVES - FLAP
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2) FLAP POS IND - T.E.
3) PTU/LG BYP V CONT - 2
4) AUTO SLAT NO. 1 DC
5) AUTO SLAT NO. 2 DC
S 865-027
(6) AIRPLANES WITH AN AUTOSLAT COMPUTER (P/N 65-52818); Make sure these circuit breakers are closed:
(a) P6-2 Panel
1) AUTOSLAT NO. 1 AC
2) AUTOSLAT NO. 2 AC
S 865-029
(7) Retract the flaps if they are not fully retracted:
WARNING: KEEP PERSONS AND EQUIPMENT CLEAR OF THE FLIGHT CONTROL
_______ SURFACES, THE THRUST REVERSERS, AND THE LANDING GEAR. THESE COMPONENTS CAN MOVE SUDDENLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(a)
Supply hydraulic power to system B (AMM 29-15-00/201).
(b)
Move the flap control lever to the UP position.
(c)
Make sure the flaps are in the fully retracted position.
(d)
Remove the hydraulic power from system B (AMM 29-15-00/201).
S 735-031
(8) Make sure the position indicator on the PTU control valve is in the closed position.
NOTE: The position indicator will point approximately 45° forward
____ of inboard when the valve is open. The position indicator will point approximately 45° aft of inboard when the valve is closed.
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E. Procedure
S 735-039
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