SDR UIEA2019060704427

Service difficulty report · Wire · Boeing 747481

Difficulty date: June 7, 2019
Submitted: June 7, 2019
Operation: Air carrier
Aircraft: N322SG
Make and model: Boeing 747481
Aircraft serial: 30322
Aircraft time: 45,914 hours, 6,019 cycles
System (JASC): 2697 · Fire Protection System Wiring
Part: Wire
Condition: Damaged
Location: Fire Loop A
Stage of operation: IN
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

EXISTING FAULT, ENG 4 LOOP A. REPLACED WIRE W5324-451, -452, -453, -454, -455, -456 IAW SWPM 20-30-11 REV. 70 AND WDM 26-11-14 REV. 45. INSTALLED TERMINAL AND CONDITION CHECK NORMAL IAW AMM-26-11-02-404-029-003, REV. 75.& PERFORMED OPERATIONAL TEST OF ENGINE FIRE AND OVERHEAT DETECTION SYSTEM, THE RESULT WAS SATISFACTORY IAW AMM 26-11-00-715-001 REV. 95.