SDR NACA2021081650001

Service difficulty report · Switch · Boeing 767323

Difficulty date: August 15, 2021
Submitted: August 19, 2021
Operation: Air carrier
Aircraft: N351CM
Make and model: Boeing 767323
Aircraft serial: 25201
Aircraft time: 104,283 hours, 18,328 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Switch
Condition: Faulted
Location: Thermal Duct
Stage of operation: DE
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

START OF DESCENT RIGHT STRUT DETECTION LEAK EICAS MESSAGE. DEFERRED PER MEL 36-11-08-01A CAT C ON 15AUG21 @1415Z. MAINT PROCEDURES APPLIED AND PRV SECURED CLOSED. AC REMAINS ETOPS 120. SET PRV BACK TO NORM IAW AMM 36-00-00/901. THIS ACTION CLOSED MEL 36-11-08-01 08-15-21 2120Z. PERFORMED TS IAW FIM 26-18 FAULT TREE 804, FOUND RH ENGINE STRUT THERMAL SWITCH TS238 AND TS239 FAULTY. REMOVED AND REPLACED THERMAL DUCT SWITCHES IAW B767 AMM 26-18-01 OPS CHECK NORMAL.