N343AL

Part: PUMP — INTERMITTENT (LT FUEL BOOST)

IN CRUISE FLIGHT, PILOT NOTICED THAT LT BOOST PUMP IS INTERMITTENT. UPON LANDING THE MECHANIC REMOVED AND REPLACED THE LT FUEL BOOST PUMP AND AC WAS RETURNED TO SERVICE AFTER COMPLETION OF OPERATIONAL CHECKS IAW MM. (K)

Part: BLADE — CORRODED (MAIN ROTOR) · airframe 13,030 hrs

TRAILING EDGE EXTRUSION EXFOLIATED, LOWER O/B GRIP FINGER DOUBLER SEPARATED AND CORRODED, ALSO CORROSION BETWEEN SKIN AND SPAR. SCRAPPED BLADE, AND INSTALLED A NEW BLADE.

Part: TUBE — DISCONNECTED (T/R CONTROL)

DURING CONTROL FUNCTION CHECK ON RUN-UP TAIL ROTOR PEDALS FELT WEAK, PILOT SHUT THE AIRCRAFT DOWN AND NOTIFIED MAINTENANCE. THE MECHANIC FOUND TAIL ROTOR CONTROL TUBE IN THE BOX BEAM TO THE BELLCRANK IN HAT RACK AREA NOT CONNECTED, THE MECHANIC RECONNECTED THE CONTROL TUBE.

Part: GEAR — CONTAMINATED (GEARBOX)

UPON DISASSEMBLY AND INSPECTION OF PARTS DUE TO METAL CONTAMINATION. PINION GEAR HAS EXCESSIVE GALLING ON GEAR TEETH DUE TO IMPROPER MACHINING AND MESHING WITH T/M GEAR. BOTH PARTS WERE SCRAPPED AND SENT FOR WARRANTY CREDIT. ASSURE PROPER MACHINING AND MESHING OF GEAR TEETH.

Part: TURBINE BLADES — CORRODED (ENGINE)

DURING DISASSEMBLY TO REPAIR FOR LOW POWER. SULPHADATION ON FRONT SIDES OF BLADES. HAVE WHEELS TESTED FOR PROPER COATING. (M)

Part: BLADE — CORRODED (ENGINE)

DURING DISASSEMBLY TO REPAIR FOR LOW POWER, SULPHIDATION ON FRONT SIDES OF BLADES. (M)

Part: BLADE — CORRODED (MAIN ROTOR)

DURING DAILY INSPECTION, CORROSION AND DEBOND OF SKIN AND SPAR BENEATH GRIP FINGER DOUBLER ON LOWER SURFACE. DAMAGE BEYOND MANUFACTURER'S LIMITS, BLADE SCRAPPED.

Part: BEARING — LOOSE (LEG ASSY)

DURING INSPECTION, FOUND BEARING WITH EXCESSIVE PLAY.

Part: LINE — LEAKING (HYDRAULIC SYSTEM)

DURING FLIGHT, THE HYDRAULIC SYSTEM LOST PRESSURE. PRESSURE LINE FROM PUMP WAS FOUND LEAKING.

Part: BLADE — CORRODED (M/R)

DURING DAILY INSPECTION FOUND BLADE SKIN CORRODED AND SEPARATED FROM SPAR AT BLADE TIP.

Part: NUT — LOST TORQUE (MAST BEARING)

WHEN REMOVING SWASHPLATE, MECHANIC FOUND NUT TO HAVE LOST TORQUE. (HAND TIGHT.) HAVE FOUND SEVERAL MAST NUTS ON 206L-3'S AND 206L-4'S MAST ASSEMBLIES THAT HAVE LOST TORQUE. BELIEVE THE CONTACT AREA BETWEEN THE MAST NUT AND THE BEARING INNER RACE IS TOO SMALL. THE 206B AND 206L-1 MAST NUTS HAVE A LARGER CONTACT AREA AND DO NOT CAUSE A PROBLEM. MODIFY MAST NUT FOR GREATER CONTACT AREA.

Part: LINK IDLER — WORN (PYLON)

DURING DAILY INSPECTION, FOUND BUSHINGS AND BEARINGS WORN BEYOND LIMITS. PARTS REQUIRING REPLACEMENT: 4 EACH 206-010-338-001 SPACERS, 4 EACH 206-010-337-001 BEARINGS, 2 EACH 206-010-338-003 BUSHINGS, 2 EACH NAS6605D64 BOLTS, 1 EACH 206-010-470-101 BEARING. SUBMITTER STATED NORMAL USE CAUSES PARTS TO WEAR OUT TOO SOON. WORN PARTS TT, 375.8 HOURS.

Part: LEVER ASSY — WORN (PYLON)

DURING DAILY INSPECTION, FOUND BUSHINGS AND BEARINGS WORN BEYOND LIMITS. PARTS REQUIRING REPLACEMENT: 4 EACH 206-010-338-001 SPACERS, 4 EACH 206-010-337-001 BEARINGS, 2 EACH 206-010-338-003 BUSHINGS, 2 EACH NAS6605D64 BOLTS, 1 EACH 206-010-470-101 BEARING. SUBMITTER STATED NORMAL USE CAUSES PARTS TO WEAR OUT TOO SOON. WORN PARTS TT, 375.8 HOURS.

Part: LINK IDLER — WORN (PYLON)

DAILY INSPECTION FOUND BUSHINGS AND BEARINGS WORN BEYOND LIMITS. PARTS REQUIRING REPLACEMENT: 4 EACH 206-010-338-001 SPACERS, 4 EACH 206-010-337-001 BEARINGS, 2 EACH 206-010-338-003 BUSHINGS, 2 EACH NAS 6605D64 BOLTS, AND 1 EACH 206-010-470-101 BEARING. NORMAL USE CAUSES PARTS TO WEAR OUT TOO SOON. WORN PARTS TT 494.1 HOURS.

Part: LEVER ASSY — WORN (PYLON)

DAILY INSPECTION FOUND BUSHINGS AND BEARINGS WORN BEYOND LIMITS. PARTS REQUIRING REPLACEMENT: 4 EACH 206-010-338-001 SPACERS, 4 EACH 206-010-337-001 BEARINGS, 2 EACH 206-010-338-003 BUSHINGS, 2 EACH NAS 6605D64 BOLTS, AND 1 EACH 206-010-470-101 BEARING. NORMAL USE CAUSES PARTS TO WEAR OUT TOO SOON. WORN PARTS TT 494.1 HOURS.

Part: COMPRESSOR — CONTAMINATED (ENGINE)

DURING A COMPRESSOR CHANGE FOUND WHILE POSITIONING THE COMPRESSOR ON A WORK BENCH, A SMALL WHITE HARD BEAD ROLLED OUT OF THE SCROLL DISCHARGE TUBE. THE COMPRESSOR SCROLL WAS BORESCOPED TO CHECK FOR ANY MORE BEADS WHICH MAY HAVE BEEN LODGED IN THE SCROLL. NO FURTHER BEADS WERE NOTED.

Part: GEARSHAFT — PITTED (GEARBOX)

UPON DISASSEMBLY AND INSPECTION, FOUND AIR OIL GEARSHAFT PITTED.