SDR UIEA200300069

Service difficulty report · Fire Loop · Boeing 747243B

Difficulty date: November 21, 2003
Submitted: December 30, 2003
Operation: Air carrier
Aircraft: N516MC
Make and model: Boeing 747243B
Aircraft serial: 22507
System (JASC): 2612 · Fire Detection
Part: Fire Loop
Condition: Shorted
Location: Nr 2 Engine
Stage of operation: AP
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

NR 2 ENGINE INDICATED FIRE ON APPROACH, SHOT BOTH BOTTLES, INDICATIONS CONTINUED. FOLLOWED FHB PROCEDURES FOR ENGINE FIRE CHECKLISTS. DISCHARGED FIRST BOTTLE, TIMED 30 SECOND LIGHT REMAINED ON. DISCHARGED SECOND BOTTLE, LIGHT REMAINED ON. B-LOOP REMAINED OFF SCALE HIGH. INSPECTED ENGINE FOUND NO EVIDENCE OF FIRE, FOUND BOTH A AND B LOOPS SHORTED TO LOCAL GROUND. REPLACED B LOOP UPPER AND REPAIRED SHORT, OPERATION CHECK OK PER MM 26.