SDR FDEA201209140353

Service difficulty report · Fire Detector · Doug MD11F

Difficulty date: September 14, 2012
Submitted: February 14, 2013
Operation: Air carrier
Aircraft: N616FE
Make and model: Doug MD11F
Aircraft serial: 48747
Aircraft time: 57,927 hours, 13,424 cycles
System (JASC): 2612 · Fire Detection
Part: Fire Detector
Condition: Failed
Stage of operation: CL
How discovered: O
Nature of condition: N
Precautionary procedure: J, A

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

What was found

AFTER DEPARTURE, CLIMBING THROUGH FL300 FOR FL330. RECEIVED FIRE DET 3 FAIL ALERT. DUMPED APPROX 17,000 LBS FUEL AND RETURNED TO DEPARTURE. AFTER BLOCK IN WITH EXTERNAL POWER ON EXTERNAL POWER DROPPED OFF. AFTER STARTING APU POWER, RECEIVED ENG 3 FIRE WARNING. VERIFIED FROM GROUND THAT THERE WAS NO ACTUAL FIRE. R & R NR 3 ENG LOOP A AND B FROM DH5C TO TB2C. OPS CHECK GOOD. REF AMM 26-11-03-4. ALSO RAN ENG IAW JRH ALL INDICATIONS NORMAL.

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