What was found
LEFT VERTICAL STAB DRAG ANGLE CRACKED. L/H VERTICAL STAB DRAG ANGLE REQUIRES REPAIR IAW CRJ900 SRM 55-31-00-201-001-A01. UPON FURTHER INVESTIGATION, FOUND LH AFT DRAG ANGLE TO REQUIRE REPLACEMENT IAW CRJ900 SRM 55-31-00-201-001-A01. REMOVED LH AFT DRAG ANGLE IAW CRJ900 SRM 51-42-13-001-001-A01, 51-42-21-001-001-A01 AND 51-42-22-001-001-A01. LOCATED AND DRILLED NEW SERVICEABLE L/H AFT DRAG ANGLE P/N: AV670-21186-003 IAW CRJ900 SRM 51-40-11-001-001-A01. L/H AFT DRAG ANGLE REQUIRES COUNTERSINK AND SURFACE PREP PRIOR TO INSTALL. COUNTERSUNK AND PREPPED SURFACE ON LH AFT DRAG ANGLE IAW CRJ900 SRM 51-40-11-001-001-A01. LH AFT DRAG ANGLE REQUIRES INSTALL. INSTALLED 18 EA CHERRY MAX AND 15 JOBOLTS IAW 51-42-13-001-001-A01 AND 51-42-22-001-001-A01. L/H AFT DRAG ANGLE REQUIRES INSTALL LOCK FASTENERS. INSTALLED NEW SERVICEABLE LH AFT DRAG ANGLE IAW CRJ900 SRM 51-42-21-001-001-A01. REPAIR AREA REQUIRES EXTERNAL PAINT. PAINTED REPAIR AREA IAW CRJ900 SRM 51-25-01-001-001-A01.