SDR ASAA2016052116810

Service difficulty report · Bleed Valve · Boeing 737890

Difficulty date: May 21, 2016
Submitted: May 23, 2016
Operation: Air carrier
Aircraft: N559AS
Make and model: Boeing 737890
Aircraft serial: 35178
Aircraft time: 35,826 hours, 10,679 cycles
System (JASC): 7532 · Compressor Bleed Valve
Part: Bleed Valve
Part number: 1074926
Part serial: 6804
Condition: Failed
Location: Nr 1 Engine
Part time: 52,685 hours, 18,585 cycles
Stage of operation: NR
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

DURING SINGLE PACK CONFIDENCE CHECK, LT DUCT PRESSURE DID NOT DROP BELOW 10 PSI, IT MAINTAINED 15 PSI. ACFT GROUNDED. R & R BAR AND PRSOV IAW AMM 36-11-03 & 36-11-04 AND PERFORMED INSTALLATION TEST IAW AMM 36-11-03 & 36-11-04 AND INSTALLATION TEST & LEAK CHECK GOOD AND PERFORMED ENGINE BLEED AIR CROSS OVER OPS TEST IAW AMM 36-11-00-700-801 & 36-11-00-710-801 & OPS TEST GOOD. NO FURTHER ACTION REQUIRED. ALL WORK ACCOMPLISHED AND DOCUMENTED ON NON ROUTINE G680561.