TM 55-2840-231-23
3-3.
Outer Combustion Case - Weld-Repair (AVIM) - Continued
COMBUSTION
SECTION/ - Continued
NOT ACCEPTABLE AND NOT REPAIRABLE
1. ARC STRIKES OR CRACKS IN SHEET METAL AREA WITHIN 2 IN. (50.8 MM) OF BUTT WELDS 1A & 1B
IN LENGTH E.
2. CRACKS IN BUTT WELDS NO. 1A&1B IN LENGTH E.
3. CRACKS IN OR ADJACENT TO BUTT WELD NO. 4.
WELD REPAIR PERMITTED
1.
2.
3.
4.
5.
6.
7.
CRACKS UP TO 1/16 IN. (1.6 MM) LENGTH IN BUTT WELDS 1A & 1B OUTSIDE OF LENGTH E.
CRACKS UP TO 1/2 IN. (12.7 MM) LENGTH OR SEPARATED CRACKS FOR AN ACCUMULATED LENGTH
OF 1-1/2 IN. (38.1 MM) TOTAL LENGTH IN BUTT WELDS 3 AND ADJACENT FLANGE.
CRACKS UP TO 1/2 IN. (12.7 MM) LENGTH OR SEPARATED CRACKS FOR AN ACCUMULATED LENGTH OF
1/2 IN. (12.7 MM) LENGTH IN BUTT WELDS 2A & 2B AND ADJACENT FLANGE.
CRACKS UP TO 1/2 IN. (12.7 MM) LENGTH IN SHEET METAL AREA WITHIN 2 IN. OF BUTT WELDS
2A& 2B IF AT LEAST 2 IN. (50.8 MM) FROM BUTT WELDS 1A & 1B IN LENGTH E.
CRACKS UP TO 1/2 IN. (12.7 MM) LENGTH IN SHEET METAL AREA ADJACENT TO BUTT WELD 3.
CRACKS UP TO 3/6 IN. (9.5 MM) LENGTH IN FILLET WELDS 5 AND 6.
CRACKS IN AREAS OTHER THAN ABOVE UP TO 1 IN. (25.4 MM) LENGTH.
3-5
