SDR LHO2004F00000

Service difficulty report · Combust Chamber · Beech 58

Difficulty date: January 9, 2004
Submitted: February 3, 2004
Operation: Air carrier
Aircraft: N85FS
Make and model: Beech 58
Aircraft serial: TH486
Engine: Cont IO520*
System (JASC): 2140 · Heating System
Part: Combust Chamber
Condition: Corroded
Location: Heater
Part time: 1,150 hours
Stage of operation: NR
How discovered: O
Nature of condition: B
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

COMBUSTION TUBE WAS FOUND TO HAVE A CORROSION HOLE IN IT. PART FAILED SOME 25 PERCENT SHORT OF TBO. PILOT NOTED SOOT ON WINDSHIELD AND ODOR IN COCKPIT. THIS HEATER HAS AN EXTENDED LIFE CERAMIC COATED TUBE AND DOES NOT REQUIRE THE FREQUENT INSPECTIONS AND DECAY TEST OF AD96-20-07. ONLY A VISUAL OR PRESSURE DECAY TEST AT 1000 HRS (PER SB 106). TBO IS 1500 HRS. THIS OPERATOR FEELS EVEN THE CERAMIC COATED COMBUSTION TUBES NEED TESTING AND INSPECTIONS AT MORE FREQUENT INTERVALS.

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