TM 55-2840-231-23
3-2.
Outer Combustion Case - Inspection - Continued
ENGINE/ - 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. CRACKS UP TO 1/16 IN. (1.6 MM) LENGTH IN BUTT WELDS 1A& 1B OUTSIDE OF LENGTH E.
2. CRACKS UP TO 1 /2 IN. (12,7 MM) LENGTH OR SEPARATED CRACKS FOR AN ACCUMULATED LENGTH
OF 14/2 IN. (38.1 MM) TOTAL LENGTH IN BUTT WELDS 3 AND ADJACENT FLANGE.
3. 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.
4. 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.
5. CRACKS UP TO 1/2 IN. (12.7 MM) LENGTH IN SHEET METAL AREA ADJACENT TO BUTT WELD 3.
6. CRACKS UP TO 3/8 IN. (9.5 MM) LENGTH IN FILLET WELDS 5 AND 6
7. CRACKS IN AREAS OTHER THAN ABOVE UP TO 1 IN. (25.4 MM) LENGTH.
3-3
