SDR ASAA2013022393970

Service difficulty report · Shutoff Valve · Boeing 737890

Difficulty date: February 23, 2013
Submitted: February 26, 2013
Operation: Air carrier
Aircraft: N588AS
Make and model: Boeing 737890
Aircraft serial: 35685
Aircraft time: 20,219 hours, 6,322 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Shutoff Valve
Part number: 32145526
Part serial: 10236
Condition: Inoperative
Location: Nr 1 Engine
Part time: 20,364 hours, 6,064 cycles
Stage of operation: CL
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

NOTICED DUCT SPLIT 18,000 L25, R35. 28,000 L35, R21. 34,000 L35, R19. MATCHED AT CRUISE AFTER 15 MINUTES, 86 L30, R30. REPLACED PRSOV REF MM 36-11-04. REPLACED PRE-COOLER CONTROL VALVE REF MM 36-12-02. REPLACED 450 SENSOR REF MM 36-11-05. ALL LEAKED CHECKED GOOD. ACCOMPLISHED ENGINE BLEED CROSSOVER TEST TASK AMM 36-11-00-710-801. OPS CHECK WITHIN LIMITS.