SDR CALA2012112800825

Service difficulty report · Sensor · Boeing 737824

Difficulty date: November 27, 2012
Submitted: November 28, 2012
Operation: Air carrier
Aircraft: N14235
Make and model: Boeing 737824
Aircraft serial: 28947
Aircraft time: 43,112 hours, 16,108 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Sensor
Part number: 1296663
Part serial: 7548
Condition: Faulty
Location: Nr 1 Engine
Part time: 38,087 hours, 13,248 cycles
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: A

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

What was found

LEFT BLEED TRIP FL 340 UNABLE TO RESET. PERFORMED ENG BLEED AIR SYS HEALTH CHECK, AMM 36-11-00-700-80 1. FOUND PRECOOLER CONTROL VALVE SENSOR; PRECOOLER CONTROL VALVE FAULTING. R & R PRECOOLER VALVE SENSOR AMM 36-12-03. PRECOOLER CONTROL VALVE AMM 36-12-02, SYS OPS NORMAL. ROTABLE PARTS CHANGE WAS INDICATED - TT 1574952, SN OFF 07548, TT 1580750, SN OFF 02024, SENSOR, PRECOOL OFF 29-3626-9-9001 7548 ON 29-3626-9-9001 5518 VALVE, PRECOOLER OFF 29-3617-9-0001 2024 ON 24-3612-9-0002 0268.