Mechanical Inspection - SB-740-91-010325

SB 740-91-01

(6) Open keyboard and verify keyboard cable is fastened to the BCU housing J10.

(7) Verify both handles are spring loaded to the down position and freely move to the horizontal position

and stops.

(8) Verify that the ground strap is securely fastened to the BCU housing.

(9) Verify Pressure Relief Valve is spring loaded to the closed position and it does not appear damaged.

(10) Verify the paint finish is uniform over the entire housing.

(b) Mechanical Inspection

(1) Verify all screws and fasteners are tight.

(2) Verify pipe plug on left side of BCU is firmly in place.

(3) Verify CHAN 1, CHAN 2 and GDU binding posts on left side of BCU push in freely and will hold a #18

wire firmly.

(4) Loosen the captive screws holding the PLU cover and check the rubber "O" ring is firmly bonded to

the cover.

(5) Observe that a PLU is not installed in the chamber. The PLU plug receptacle shall have no bent or

missing pins. Close PLU cover and tighten captive screws.

(6) Verify the keyboard assembly latches are properly adjusted to close the door firmly against the BCU

housing assembly.

(7) Lower -the keyboard and check the lock assembly to hold the keyboard door in position.

(8) Check that the lock plunger is seated properly in the bar countersink of the PLU door handle.

(9) Verify all keys on the keyboard are firmly in place and the rubber boots are not damaged.

(10) Verify all knobs are secured on their control shafts and detent switches detent properly and the knob

indicators line up with the proper nomenclature.

(11) Verify all potentiometer type controls rotate smoothly to their stops. There shall not be any 360

rotation of these controls.

(12) Close and lock the keyboard assembly.

Change 1 B-130.2