Apply new weld

TM 5-5420-279-23

CAUTION

Take care not to damage the parent metal. Ensure that the defective weld has been

completely removed.

(b)

Hand mill a gradual taper at each end of the cut-out area.

NOTE

Depending upon the component, the type of joint and the length of the weld, it may

be permissible to remove the weld on a milling machine.

(c)

If applicable, hand mill the original weld preparation on the parent metal. (See

Sections 5 and 6).

(d)

Wire brush the joint to remove all loose material and oxide film.

(e)

Inspect visually for any remaining cracks.

CAUTION

Do not use the dye penetrant technique. The seepage of dye through exposed joint

gaps will contaminate the parent metal and cause porosity in the repair weld.

WARNING

PRIOR TO ANY WELDING ON THE LAUNCH VEHICLE PROCEDURE 6-39 GENERAL

WELDING MAINTENANCE FROM TM 9-2320-364-34-2 CHAPTER 2 MUST BE

PERFORMED ALONG WITH THE DISCONNECTION OF ALL EXTERNAL MIL

CONNECTORS FROM BOTH THE LAUNCHER CABINET AND THE OPERATOR

CABINET. BOTH THE CHEST PACK AND THE TAIL LIFT PENDANT MUST ALSO BE

REMOVED.

(4)

Apply new weld

(a) Note the welding conditions for type of joint and weld size. See Section 5.

(b) Finish weld as required.

(5)

Final Inspection

Inspect the weld using the dye penetrant technique (Section 3 c.).

Appendix K Page 6