N260AS

Part: BATTERY — DISCHARGED (CABIN)

DURING HANGAR INSPECTION IN TXK, THE LEFT OVERWING EMERGENCY LIGHT WAS FOUND INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE NR 1 EMERGENCY LIGHT BATTERY. OPERATIONAL CHECKS GOOD. AIRCRAFT OK FOR SERVICE. (M)

Part: STRINGER — CRACKED (RT WING)

DURING SCHEDULED MAINTENANCE IN TXK, STRINGER 10 ON THE RIGHT WING WAS FOUND CRACKED AT THE OUTBOARD EDGE OF THE NR 1 FUEL PANEL. MAINTENANCE REPAIRED STRINGER 10 ON THE RIGHT WING AT THE OUTBOARD EDGE OF THE NR 1 FUEL PANEL IAW EMB-120 SRM 57-20-03. THE NR 1 FUEL PANEL ON THE RIGHT WING WAS REINSTALLED IAW ASA EO 120-51-0005. LEAK CHECK GOOD AND RII INSPECTION COMPLIED WITH. (M)

Part: BRACKET — CRACKED (LT WING)

DURING SCHEDULED MAINTENANCE IN TXK, RIB 8 WAS FOUND WITH CRAKES SKIN SUPPORT BRACKET AFT OF THE NR 1 FUEL PANEL ON THE LEFT WING. MAINTENANCE REMOVED AND REPLACED THE SKIN SUPPORT BRACKET AT RIB 8 ON THE AFT SIDE OF THE NR 1 FUEL PANEL ON THE LEFT WING. MAINTENANCE THEN REINSTALLED THE LEFT WING NR 1 FUEL PANEL IAW ASA EO 120-51-0005. LEAK CHECK GOOD. AIRCRAFT RETURNED TO SERVICE. (M)

Part: BATTERY PACK — DISCHARGED (CABIN)

DURING SCHEDULED MAINTENANCE IN TXK, SEVERAL EMERGENCY EXIT LIGHTS WERE FOUND INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE NR 1 EMERGENCY LIGHTING BATTERY PACK. OPS CHECKS GOOD. AIRCRAFT OK FOR SERVICE. (M)

Part: BATTERY PACK — INOPERATIVE (CABIN)

FLT 4935 - DURING GROUND INSPECTION IN DFW, CREW OBSERVED MID SECTION OF EMERGENCY FLOOR LIGHTS WERE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED MID SECTION EMERGENCY LIGHT BATTERY PACK. OPERATIONAL CHECKS NORMAL. AIRCRAFT OK FOR SERVICE. (M)

Part: FRAME — CRACKED (ENGINE NACELLE)

DURING ROUTINE MAINTENANCE C-CHECK, A CRACK WAS FOUND ON BOTH ENGINE NACELLE FRAMES NR 1. THE CRACK IS LOCATED ON THE LOWER SIDE OF THE STIFFENING WEB BETWEEN THE TOP OUTBOARD MOUNTING HOLE AND THE OUTBOARD EDGE OF THE FRAME. SUBMITTER RECOMMENDED REPLACING BOTH FRAMES AND CONTINUE MONITORING IAW EXISITING CHECKS. (X)

Part: ANGLE — CRACKED (LT VERT STAB)

DURING A ROUTINE MAINTENANCE C-CHECK, CRACKS WERE FOUND ON THE LEFT SIDE OF THE VERTICAL STABILIZER CHINE ANGLE BETWEEN STA 16128.0 AND STA 16144.9 AT 3 WORKING RIVETS. POSSIBLE CAUSE. FATIGUE/VIBRATION. SUBMITER RECOMMENDED A DETAILED INSPECTION CALL OUT DURING C-CHECK. (X)

Part: SKIN — CORRODED (BS 15)

TWO AREAS OF CORROSION WERE FOUND ON THE INNER SIDE WHICH EXCEEDED THE MANUFACTURER'S ALLLOWABLE LIMITS. THE CAUSE OF CORROSION IN THIS AREA IS DUE TO THE PRESENCE OF EXCESSIVE MOISTURE, AND OTHER CONTAMINENTS WHICH ARE FREQUENTLY PRESENT. THE FIRST AREA WAS APPROXIMATELY 1 INCH AFT OF FRAME 15 IN BETWEEN STR 16L AND STR 17L, ON THE CHEM-MILLED AREA OF THE INNER SKIN. DEPTH OF THE CORROSION WAS .050 INCH. THE SECOND AREA OF CORROSION EXTENDED FROM THE EDGE OF THE AFT SIDE OF FRAME 15A, 1.5 INCHES, AND EXTENDED FROM THE CENTER RIVET LINE OF STR 18L, 2.2 INCHES TOWARDS STR 17L. THE DEPTH OF CORROSION WAS .030 INCH.

Part: NUT — LOOSE (MLG)

DURING C-CHECK INSPECTION OF THE LT AND RT MLG, THE NUT RETAINING THE INBOARD TRUNNION BEARING WAS FOUND TO HAVE PLAY. THE LOCK WASHER WAS ALL THAT WAS HOLDING NUT IN PLACE. UPON REMOVAL OF GEARS, IT WAS FOUND THAT THE ADJUSTMENT SKIN ON THE OUTBOARD SIDE OF GEAR WAS DETERIORATING.

Part: RIVET — SHEARED (VERT STABILIZER)

DURING C-CHECK INSPECTION, A RIVET HEAD WAS FOUND SEVERED FROM ITS SHAFT. THE RIVET LOCATION IS AT FRAME 47, STA X16128, AT THE LEFT HAND SIDE OF THE VERTICAL STABILIZER BASE. THERE IS NO INDICATION AS TO WHAT CAUSED THE RIVET HEAD TO BECOME SEVERED. THE HOLE DOES NOT SHOW EVIDENCE OF ANY DAMAGE. SUBMITTER RECOMMENDED REPLACING RIVET AND CONTINUE MONITORING WITH ESTABLISHED C-CHECKS.

Part: SLEEVE — TORN (LT ACM)

OKC/DFW - FLT 7683 - ON TAXI-OUT, CREW RECEIVED TRIPLE CHIME/AURAL WARNING 'DUCT LEAK' ON THE LT SIDE. MECHANIC TIGHTENED HOSE COMING OFF HEAT EXHANGER AND COOLED OFF SENSOR LINE FOR THE LIGHT. AFTER ENG START AND SELECTING PACKS 'ON', RECEIVED LT SIDE 'PACK FAIL' FOLLOWED BY SMOKE BILLOWING FROM ALL AIR VENTS. ACFT EVACUATED WITH NO FURTHER INCIDENCE. MAINTENANCE DEFERRED THE LT PACK AND ACFT POSITIONED BACK TO DFW. DFW MAINTENANCE FOUND THE SLEEVE FROM ACM BYPASS TO THE SECONDARY HEAT EXCHANGER TORN AND THE SLEEVE AT THE HEAT EXCHANGER ON THE SAME SIDE LEAKING. REMOVED AND REPLACED SLEEVE AT ACM BYPASS AND SECURED SLEEVE AT THE HEAT EXCHANGER. OPERATIONAL CHECKS GOOD, ACFT RELEASED FOR SERVICE. (X)