SDR CALA2013081990567

Service difficulty report · Detector · Boeing 777222

Difficulty date: August 15, 2013
Submitted: August 21, 2013
Operation: Air carrier
Aircraft: N223UA
Make and model: Boeing 777222
Aircraft serial: 30224
Aircraft time: 51,729 hours, 6,215 cycles
Engine: Pwa PW40903
System (JASC): 2613 · Overheat Detection
Part: Detector
Condition: Failed
Location: Overheat
Stage of operation: NR
How discovered: 9
Nature of condition: N
Precautionary procedure: O

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

What was found

STATUS MESSAGE "BLEED LOOP 1 BODY". MESSAGE 26-32181. NO OTHER MESSAGE FOUND. SUSPECT BLEED LOOP 1 ZONES 17 AND 18 BAD. MX MESSAGES 26-3 2181 AND 26-32171 POINTS TO ZONES INTERMITTENTLY SHORTED. VISUAL INSPECTED LOOPS IN ZONES 17 AND 18 AND OK. CHECKED RESISTANCE IAW FIM 26-18, TASK 84. M26145 READ 131K. M26146 RESISTANCE READ 1800 OHMS. INBD MAINT MSG 26-32181, BODY LOOP 1 ZONE 18 SHORT. REPLACED DETECTOR M26146. NO CURRENT FAULT.