SDR FDEA2018080321896

Service difficulty report · Thermal Switch · Boeing 7572S7

Difficulty date: August 2, 2018
Submitted: August 14, 2018
Operation: Air carrier
Aircraft: N926FD
Make and model: Boeing 7572S7
Aircraft serial: 23323
Aircraft time: 95,160 hours, 37,307 cycles
System (JASC): 2613 · Overheat Detection
Part: Thermal Switch
Part number: 9750304003
Condition: Failed
Location: Lt Engine
Stage of operation: CL
How discovered: O
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

LT ENG STRUT OH DET 1 EICAS MESSAGE ON STATUS PAGE DURING CLIMB OUT TO 360. FOUND THERMAL SWITCH S10196 GIVING AN OVERHEAT DETECTION INDICATION BEFORE TEMPERATURE THRESHOLD. REMOVED AND REPLACED THERMAL SWITCHES S10194, S10195, AND S10196 FOR THE LEFT STRUT OVERHEAT LOOP 1, OPS CHECK GOOD IAW AMM 26-12-01-4.

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