SDR MZZA2011020400005

Service difficulty report · Control Valve · Boeing 737824

Difficulty date: February 3, 2011
Submitted: February 4, 2011
Operation: Air carrier
Aircraft: N26232
Make and model: Boeing 737824
Aircraft serial: 28942
Aircraft time: 38,716 hours, 14,447 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Control Valve
Part number: 32895625
Part serial: 9081
Condition: Failed
Location: Bleed Air Sys
Part time: 17,847 hours, 6,057 cycles
Stage of operation: CL
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

BLEED TRIP OFF LIGHT ON. RIGHT PACK 40 PSI, LEFT PACK 8 PSI. RETARD THROTTLES, RAN SPLIT. NO CHANGE PACK SAME PRESSURE NORMAL. PERFD PRECOOLER CTRL VALVE SYS HEALTH CHECK FOR NR 1 ENG IAW AMM 36 -12-00, FOUND BUTTERFLY SHAFT ON VALVE INOP. R&R SAME IAW AMM 36-12-02, RAN BOTH ENG AT HIGH PWR W/NO SPLIT OR BLEED TRIP. OP S & LEAK CHECKS NOW GOOD, OK TO CONTINUE ROTABLE PARTS CHANGE WAS INDICATED - TT # 1433993 SN OFF 09081 VALVE, PRECOOL OFF 03-3617-9-0001 9081 ON 29-3617-9-0001 5072.