SDR AALA20090716DFW01

Service difficulty report · Electronic Unit · Doug DC983

Difficulty date: July 16, 2009
Submitted: July 23, 2009
Operation: Air carrier
Aircraft: N980TW
Make and model: Doug DC983
Aircraft serial: 53630
Aircraft time: 28,144 hours, 13,429 cycles
System (JASC): 2612 · Fire Detection
Part: Electronic Unit
Part number: 473925
Condition: Faulty
Location: Cargo Bay
Stage of operation: CL
How discovered: O
Nature of condition: N
Precautionary procedure: F

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

What was found

AFT CARGO FIRE INDICATIONS AT 20,000 OUT OF DFW. LEVELED AT 21,000, RETURNED TO DFW BOTH FIRE BOTTLES DISCHARGED. EVEN AFTER BOTTLES DISCHARGED, HAD INTERMITTENT AFT CARGO FIRE INDICATIONS. REPLACED CARGO ELECTRONIC UNIT. SYSTEM GROUND CHECK NORMAL OPERATION.

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