N31211

ATA 7720

Part: GAUGE — MALFUNCTIONED

NR 1 ENGINE, T5 GAUGE BEGAN CLIMBING WITH DIGITAL STEADY. SHUTDOWN NR 1 ENGINE AND T5 STAYED AT 700C. REPLACED NR1, T5 GAUGE WITH SERVICEABLE UNIT. (K)

ATA 2435

Part: STARTER GEN — FAILED (NR 1 GEN)

DC ESSENTIAL BUSS CAUTION LIGHT ILLUMINATED IN FLIGHT. COMPLIED WITH EMERGENCY PROCEDURE AND PROCEEDED AND TERMINATED FLIGHT. FOUND NR 1 GENERATOR HAD FAILED. REPLACED NR 1 GENERATOR WITH SERVICEABLE UNIT. AIRCRAFT GROUND RUN AND FUNCTIONAL CHECKED GOOD IAW MM. (K)

ATA 7797

Part: WIRE — BROKEN (INDICATOR)

T-5 INDICATOR PROBLEM MANIFESTED DURING FLIGHT. INSPECTED SYSTEM AND FOUND BROKEN WIRE AT PIN NR 11 OF NR 2 T-5 INDICATOR CONNECTOR. REPAIRED BROKEN WIRE IAW S-76 MM. PERFORMED SYSTEM TEST USING TESTER. GROUND RUN-UP PERFORMED. NO DEFECTS NOTED. SYSTEM RETURNED TO SERVICE. (K)

ATA 6320

Part: PINION GEAR — CORRODED (GEARBOX) · airframe 14,442 hrs

FOUND CORROSION AND RUST PITTING AT ROOT OF GEAR TEETH. REMOVED AND REPLACED. REQUEST WARRANTY CREDIT DUE TO LOW TIME.

ATA 8300

Part: GEAR — SPALLED (GEARBOX) · airframe 8,845 hrs

FOUND SPALLING ON FWD. GEAR TEETH. REMOVED AND REPLACED WITH NEW PART.

ATA 7210

Part: GEAR — MISMANUFACTURED (GEARBOX)

GEARBOX WAS DISASSEMBLED DUE TO ENGINE CHIP LIGHT. IMPROPER MACHINING AND MESHING OF GEAR TEETH, CAUSING PINION GEAR TO GALL. ALSO CAUSED EXCESSIVE METAL CONTAMINATION. ASSURE PROPER MACHINING AND MECHING OF GEAR TEETH AT FACTORY.

ATA 6510

Part: BEARING — WORN (TAIL ROTOR)

PILOT REPORTED THAT T/R PEDALS WERE DRIVING THE COLLECTIVE. TROUBLESHOOTING FOUND BEARING WORN AND ROUGH. REPLACED BEARING AND OPS CHECK C/W. SUBMITTER RECOMMENDED BEARINGS BE REPLACED WHEN T/R CABLES ARE REPLACED. THIS IS THE 3RD SET OF BEARINGS REPLACED ON S76 FLEET. (X)

ATA 5302

Part: SKIN — CORRODED (TAIL BOOM)

CORROSION. SEVERE EXFOLIATION BETWEEN STA 250 - STA 300 AND STA 300 - STA 336, WITH ADDITIONAL CORROSION AT TAILBOOM, VERTICAL FIN ATTACHMENT. CORROSION AREAS ARE BETWEEN ENGINE LONGERONS AND OUTER SKIN PANELS IN NEARLY INACCESSIBLE AREAS.

ATA 7603

Part: CONTROL CABLE — MALFUNCTIONED (THROTTLE)

ON LANDING, NR 1 ENGINE WOULD NOT GO FROM IDLE OFF. SHUT DOWN WAS DONE BY USING FUEL LEVER AND ROTOR BRAKE. WHEN BRAKE WAS APPLIED, RPM WAS TOO HIGH AND R/B CAUGHT FIRE. FIRE WAS PUT OUT AND ENGINE SHUT DOWN. FOUND THROTTLE CABLE BROKEN INTERNALLY. REMOVED R/B SYSTEM AND CABLE. INSPECTED PLENUM AREA PER M & O AND SKY TECH REP. NO DAMAGE FOUND. INSTALLED NEW CABLE AND R/B SYSTEM. OPS CHECK OK. SUBMITTER RECOMMENDED BETTER COCKPIT PROCEDURES DURING PROBLEMS LIKE THIS.

ATA 6210

Part: BLADE — DEFECTIVE (M/R LE STRIP)

FOUND APPROXIMATELY 8.50 INCH SECTION OF MAIN ROTOR BLADE NICKLE LEADING EDGE STRIP MISSING APPROXIMATELY 48 INCHES FROM THE TIP CAP. THIS AREA HAD A CRACK IN THE LEADING EDGE AND IT WAS REPAIRED PER THE COMPOSITE REPAIR MANUAL. SUSPECT DISBONDING UNDER THE STRIP FROM CRACK. RECOMMEND A BETTER PROCEDURE FOR SEALING CRACKS IN LEADING EDGE ABRASION STRIPS.

ATA 3210

Part: TUBE — CORRODED (MLG)

DURING INSPECTION, FOUND HI-LOCK FASTENER ON RIGHT SIDE OF TUBE STICKING OUT APPROXIMATELY .0625 INCH ON BOTH ENDS. THE FASTENER HAD CORRODED IN THE CENTER AND BROKE. PART NUMBER OF THE FASTENER IS 1528-20 AND THE COLLAR IS NAS1080D8. SUBMITTER RECOMMENDS A ONE TIME INSPECTION AND REPLACEMENT OF ALL HI-LOCKS AND A 300 HOUR INSPECTION OF THE TUBE ASSY FOR CORROSION AND PITTING ON THE INSIDE.

ATA 6510

Part: DRIVE SHAFT — SCORED (T/R NR 1)

WHEN COMPLYING WITH ASB 76-53-35, MOD TO CENTER FIREWALL, FOUND NR 1 DRIVE SHAFT SCORED FOR A LENGTH OF 4.50 INCHES. DEPTH OF SCORE APPROXIMATELY .005 INCH. REPLACED WITH NEW SHAFT. SUSPECT THAT SOMEONE PRESSED DOWN ON TOP OF CENTER FIREWALL CAUSING IT TO RUB SHAFT. ASB WILL RELIEVE CAUSE OF PROBLEM.