Section IV. TROUBLESHOOTING - TM-9-4931-583-30-P0023

9-4931-583-30&P

S E C T I O N IV.

TROUBLESHOOTING

Failure of any

NOTE

2-8.

Troubleshooting.

alignment step, table 2-1, will require isolation of

All blocks mounted on the main frame

fault to block assembly or frame.

a s s e m b l y are aligned and shimmed

during manufacture and must not be

disturbed. If blocks have been moved

a. Check all fittings to ensure correct

or altered the main frame assembly

assembly (all dowel pins and holes engaged and

shall be sent to depot for disposition.

fittings securely connected).

c. Ensure main frame assemblv mounting

surfaces are properly seated on slider studs.

b. Ensure block assemblies on all alignment

assemblies are firmly installed and seated on their

d. Check for failure of block alignment or

respective mounting plates (retainer bolts and

frame out of alignment. Refer to table 2-2.

lockwire undisturbed).

Table 2-2. Troubleshooting

MALFUNCTION

T E S T OR INSPECTION

C O R R E C T I V E ACTION

BAGSE

SELF-ALIGNMENT BORESIGHT ALIGNMENT DOES NOT CHECK WITHIN TOLERANCE.

Ensure boresight telescopes are properly aligned.

Step 1.

Step 2. Check to see if one block assembly alignment holes do not align with any other block

assembly.

If block assembly main frame assembly is misaligned, replace main frame assembly

and ship to depot for repair.

If block assembly on other than main frame assembly is misaligned, adjust block

assembly mounting adjustments.

Step 3. Check block assembly boresight telescope mounting port bushing for looseness or

damage.

Ship block assembly to depot level for bushing replacement.

Step 4. Check frame assembly for warped, bent or other damage to cause misalignment of block

assembly. A twisted frame is suspect when more than one block cannot be aligned.

Ship main frame assembly to depot for repair.

2-10