Continental GTSIO520M reciprocating engine power section—stud separated. SDR 510021017
LH engine No5 cylinder lower forward holddown stud separated. P/No: 6461401. TSN: 1467 hours.
Continental IO360HB magneto/distributor—screw missing. SDR 510020927
On engine ground runs, L/H magneto found out of limits. Initial findings show five housing screws missing and magneto separated. P/No: 10157158. TSO: 445 hours.
Lycoming IO360M1A engine fuel pump—pump faulty. SDR 510021086
Engine driven fuel pump faulty. High-fuel flow with fuel pressure fluctuating + – 1psi. P/No: 62B26931. TSN: 30 hours.
Lycoming IO360M1A engine fuel pump—pump faulty. SDR 510021087
Engine driven fuel pump faulty. High fuel flow. P/No: 62B26931. TSN: 63 hours.
Lycoming IO540E1B5 fuel control/reciprocating engines—FCU low pressure. SDR 510021148
Fuel control unit (FCU) unserviceable. Pump had low fuel flow with boost pump off. P/No: RS10B1. TSO: 2457 hours.
Lycoming IO540E1B5 fuel pressure indicating system—vent line FOD. SDR 510021085
Fuel pressure indicator gauge vent line blocked by wasp nest. Investigation also found a cracked bellows within the gauge.
Lycoming IO540E1B5 reciprocating engine power section—crankcase cracked. SDR 510021002
Engine crankcase cracked in area above No 4 cylinder. Crack length approximately 25.4mm (1in). P/No: LW11036. TSO: 2110 hours
Lycoming IO540E1B5 reciprocating engine power section—crankcase cracked. SDR 510021035
RH engine crankcase cracked between No 5 cylinder lower hold down studs. Cylinder partially separated. P/No: LW11036. TSO: 1269 hours.
Lycoming LTIO540J2BD reciprocating engine cylinder section—piston ring broken. SDR 510021089
RH engine No 1, No 2, No and No 4 cylinders had glazing of the cylinder barrels. No 4 cylinder compression rings broken and oil control ring seized.
Lycoming O235 engine fuel/oil cooler—oil cooler cracked. SDR 510020903 (photo above)
On final approach, pilot noticed low oil pressure. Oil cooler found cracked at the top tank weld seam. P/No: 1156031. TSN: 881 hours.
Lycoming O320E2D engine reciprocating—exhaust valve broken. SDR 510020919
In cruise pilot reported engine vibration and loss of power. No compression on #4 cylinder. Exhaust valve head had separated from stem, valve guide and exhaust flange cracked, piston damaged. All four cylinders replaced with complete cylinder kits.
Lycoming O320E2D reciprocating engine cylinder section—valve sticking. SDR 510021154
No 4 cylinder valve sticking in valve guide due to carbon build-up. P/No: 17B23936. TSO: 644 hours.
Lycoming O360 engine reciprocating—clamp separated. SDR 510020915
Engine air inlet hose found separated from cowl duct. Suspect failed hose clamp. P/No: Z00N7141010075. TSN: 7929 hours.
Lycoming O360J2A fuel control/reciprocating engines—carburettor faulty. SDR 510021047
Carburettor running lean.
Magneto/distributor—magneto unserviceable. SDR 510020917
Operator reported hard starting. Troubleshooting found L/H magneto starting spark retard to be 10 degrees late. Magneto replaced and tested serviceable. Fault is incorrect impulse coupling fitted at manufacture of magneto. P/No: 4371. TSN: 429 hours/29 months.
Magneto/distributor—magneto unserviceable. SDR 510020918
Operator reported hard starting. Troubleshooting found LH Magneto starting spark retard (impulse coupling) to be 10 degrees late or 10 degrees after top dead center. New replacement magneto sourced and installed, retard timing checked and found correct. Fault is incorrect Impulse coupling fitted at manufacture of magneto. P/No: 4373. TSN: 277 hours/26 months.