SDR ASAA2017061621114

Service difficulty report · Shutoff Valve · Boeing 737890

Difficulty date: June 16, 2017
Submitted: June 19, 2017
Operation: Air carrier
Aircraft: N584AS
Make and model: Boeing 737890
Aircraft serial: 35682
Aircraft time: 37,559 hours, 11,174 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Shutoff Valve
Part number: 32145526
Part serial: 2789
Condition: Leaking
Location: Nr 1 Engine
Part time: 66,320 hours, 31,102 cycles
Stage of operation: CR
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

RT A/C PACK 44 PSI, LT A/C PACK 15 PSI, FL 360, N1 90.4%. RT PACK 30 PSI, LT PACK 30 PSI, FL 22, N1 60.0% GROUND IDLE/ LT & RT PACKS 15%. ACFT GROUNDED. TROUBLESHOT IAW FIM 36-10, TASK 810. DURING FURTHER EVALUATION FOUND A LEAKING PRSOV & STICKING VALVE. REMOVED & REPLACED THE PRSOV IAW AMM 36-11-04. GROUND VERIFICATION SUCCESSFUL.