SDR ASAA2023061543610

Service difficulty report · Wire Harness · Boeing 737990ER

Difficulty date: June 15, 2023
Submitted: June 20, 2023
Operation: Air carrier
Aircraft: N468AS
Make and model: Boeing 737990ER
Aircraft serial: 41735
Aircraft time: 33,255 hours, 10,500 cycles
System (JASC): 2697 · Fire Protection System Wiring
Part: Wire Harness
Part number: CA24402
Condition: Failed
Location: #1 Engine
Stage of operation: IN
How discovered: V
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

ENGINE #1 A OR B FIRE LOOP WONT TEST. GROUNDED - YES. VERIFIED - REF. ASA L/P 60588323, WHILE T/S B LOOP, FOUND "A" LOOP OPEN AT CORE HARNESS MW0325. REF. B737-900 AMM 26-11-02, REMOVED/REPLACED #1 ENG. CORE DETECTOR HARNESS MW0325, INSULATORS AND CLAMPS. OPS NML.