SDR DHL2002743003

Service difficulty report · Fire Detector · Boeing 727225

Difficulty date: April 10, 2002
Submitted: April 12, 2002
Operation: Air carrier
Aircraft: N743DH
Make and model: Boeing 727225
Aircraft serial: 22438
System (JASC): 2612 · Fire Detection
Part: Fire Detector
Condition: Malfunctioned
Location: Nr 1 Engine
Stage of operation: UK
How discovered: C
Nature of condition: L
Precautionary procedure: K

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

What was found

NR 1 DET CIRCUIT GRD LIGHT DOES NOT ILLUM W/ FIRE TEST. BOOT STRAPPED NEW FIRE LOOP NR 1 ENG, NO HELP. SWAPPED OPERATING PWR UNIT, NO HELP. SWAPPED R604 & R605, NO HELP. INSPECTED ENG WIRING, NO DEFECTS. R&R FIRE & OVERHEAT DET ACCY UNIT, NO HELP. ORIG ACCY UNIT REINSTALLED DMI REMAINS OPEN. RAN ENG FIRE TEST ON GROUND. SYS OPS CHECKS NORM, PLACARD REMOVED.