SDR ASAA2017010619256

Service difficulty report · Fire Loop · Boeing 737890

Difficulty date: January 6, 2017
Submitted: January 12, 2017
Operation: Air carrier
Aircraft: N518AS
Make and model: Boeing 737890
Aircraft serial: 35693
Aircraft time: 30,626 hours, 9,055 cycles
System (JASC): 2611 · Smoke Detection
Part: Fire Loop
Condition: Malfunctioned
Location: Nr 2 Nacelle
Stage of operation: IN
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

WITH LOOP SELECTORS IN, NR 2 ENGINE DOES NOT TEST ON FIRE SYSTEM CHECK. ACFT GROUNDED. UNABLE TO DUPLICATE DEFECT. IAW AMM 26-11-00, ACCOMPLISHED ENGINE FIRE DETECTION LOOP RESISTANCE SYSTEM TEST, ALL VALUES ARE WITHIN LIMITS. REINSTALLED ENGINE, AND APU FIRE DETECTION MODULE IAW AMM 26-10-01, OPS CHECKED NORMAL.