17 May to 13 July 2017

1583

LYCOMING TIO540 J2BD–ATA 8520 RECIPROCATING ENGINE POWER SECTION–CAMSHAFT–FAILED. DR 611750182

Metal contamination found in oil filter inspection, suspected camshaft failure. Engine removed for further investigation.

LYCOMING LTIO540 J2BD–ATA 8520 RECIPROCATING ENGINE POWER SECTION–VALVE SEAT–DAMAGED. DR 611750232 (photo above)

Pilot reported low cylinder head temp and low EGT. Defect traced to # 6 cylinder valve seat failure. Consequently, engine is due for removal.

CONTINENTAL IO550 B–ATA 7810 ENGINE COLLECTOR/TAILPIPE/NOZZLE–MUFFLER–HOLED. DR 611750305 (photo above)

Heat buckling that caused a hole in the muffler. Age and heat could be two possible contributory factors. Parts replaced.

PRATT AND WHITNEY R985 AN14B–ATA 8500 ENGINE RECIPROCATING–PISTON ENGINE–CONTAM-METAL. DR 611750333

Metal contamination found while carrying out 50 hour inspection. Investigations will follow.

PRATT AND WHITNEY R985 AN14B–ATA 8500 ENGINE RECIPROCATING–PISTON ENGINE–CONTAM-METAL. DR 611750334

Pilot shut down engine with a sudden stop. Main bearing found seized with no metal contamination found at any inspection to this point. Engine replaced.

LYCOMING IO540 E1B5–ATA 8550 RECIPROCATING ENGINE INTERNAL OIL SYSTEM–ENGINE OIL–LOW PRESSURE. DR 611750353

During engine run up–oil pressure dropped to below 40PSI. Root cause unknown at this time. Replace engine.

LYCOMING TIO540 J2BD–ATA 8520 RECIPROCATING ENGINE POWER SECTION–Absolute Controller–FAULTY. DR 611750373

Engine found to be lagging behind other engine going to full power. Fault found to be with defective absolute controller. Overhauled controller fitted, ground run carried out, defect rectified.

CONTINENTAL IO520 N–ATA 7314 ENGINE FUEL PUMP–HOSE–LOOSE AND LEAKING. DR 611750382

Pilot reported loss of engine power on climb out once the fuel boost pump was selected off. On selecting boost pump on, engine, regained power. Initially, it was suspected that engine driven fuel pump was faulty however, during inspections, hose from the boost pump to the engine driven pump was found leaking from the engine driven pump connection. The B nut was inspected and found serviceable. The B nut connection was reconnected, torqued correctly. Engine ground run carried out with all parameters found within limits.

LYCOMING IO540 E1B5–ATA 8500 ENGINE RECIPROCATING–CRANKCASE–CRACKED. DR 611750390

Minor oil leak detected. Defect was traced to a crack below # 1 cylinder using dye penetrant inspection. Engine would be replaced.

LYCOMING IO540 E1B5–ATA 8500 ENGINE RECIPROCATING–Connecting Rod–FAILED BEARING. DR 611750393

Engine failed at take off–connecting rod failed. Suspected small end bearing manufacturing defect. Engine replaced

LYCOMING IO540 E1B5–ATA 8520 RECIPROCATING ENGINE POWER SECTION–BUSHING–FAILED. DR 611750406

Engine suspected of having defective bush fitted. At inspection, cylinders were removed to check the bushes. No 5 cylinder was found to have a loose bush. Bush was able to be removed by hand pressure. Bush replaced.

LYCOMING VO435 B1A–ATA 8520 RECIPROCATING ENGINE POWER SECTION–BEARING–WORN. DR 611750428

Engine oil pressure light was illuminated in flight. During the course of troubleshooting, lower bearing, big end and main bearings were excessively worn.

LYCOMING O540 F1B5–ATA 8500 ENGINE RECIPROCATING–BEARING–WORN. DR 611750431

Pilot reported loud ticking noise on start up. Initial investigations suggested stuck lifter with new lifters installed in #6 cylinder to remedy the tick; ground runs proved tick still evident so compression test and oil filter inspection carried out. Compression sub 50/80 and oil filter rinse showed massive amounts of very fine bronze/brass material. The #6 cylinder was removed. It was observed that the conrod little end bearing had ‘walked’ from conrod. It caused large clearances between gudgeon pin and conrod.

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