What was found
IN REFERENCE TO NRC 00604: CORROSION ON STRINGER 19RH, 20RH AND 21RH IN STA. FS= 437 TO FS= 453 AT MAIN AVIONICS COMPARTMENT. (E/E) SUMMARY OF NRC 677 CORROSION ON STRINGER 20RH AND 21RH IN STA. FS= 437 TO FS= 453 AT MAIN AVIONICS COMPARTMENT WERE EVALUATED OUT LIMITS PER CRJ-900 SRM 53-21-03-101-006-A04 AND REPLACED PER CRJ-900 SRM 51-42-06-001-001-A01 AND PER CRJ-900 SRM 51-42-21-001-001-A01, CORROSION ON STRINGER 19RH IN STA. FS= 437 TO FS= 453 AT MAIN AVIONICS COMPARTMENT WAS EVALUATED OUT LIMITS PER CRJ-900 SRM 53-21-03-101-007-A05 AND REPAIRED PER CRJ-900 SRM 53-00-03-201-001-A02 AND TS # 012308