SDR REXA201100877

Service difficulty report · Switch · Cndair CL6002B19

Difficulty date: November 27, 2011
Submitted: December 1, 2011
Operation: Air carrier
Aircraft: N8970D
Make and model: Cndair CL6002B19
Aircraft serial: 7907
Aircraft time: 17,929 hours, 15,090 cycles
System (JASC): 3620 · Pneumatic Indicating System
Part: Switch
Condition: Defective
Location: Bleed Air Sys
Stage of operation: TO
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

ON DEP WITH WING ANTI ICE OFF, GOT ANTI ICE DUCT WARNING, MSG THEN WENT AWAY. LATER WITH IT ON NORM IT CAME BACK, ALSO IN STBY MODE, ALL LEFT LEADING EDGE. FOUND LT O/B SECTION LEAK DET CIRCUIT SHORTING WHEN HOT. REMOVED AND REPLACED ALL O/B SWITCHES & OP CHECK GOOD IAW AMM 36-21-00. LT WING OVERHEAT WARNING MESSAGE INFLIGHT. T/S SYSTEM FOUND LT LEADING EDGE OUTBOARD CIRCUIT HAVING HIGH RESISTANCE CHECKED FOR WIRING. WIRING CHECKED GOOD. REMOVED AND REPLACED S27WK. SYSTEM OPC GOOD IAW AMM 36-21-00.