SDR ASAA2016010814702

Service difficulty report · Regulator · Boeing 737890

Difficulty date: January 8, 2016
Submitted: January 12, 2016
Operation: Air carrier
Aircraft: N588AS
Make and model: Boeing 737890
Aircraft serial: 35685
Aircraft time: 31,487 hours, 9,595 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Regulator
Part number: 1074847
Part serial: 11987
Condition: Failed
Location: Nr 1 Engine
Part time: 20,326 hours, 6,103 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

ON CLIMB OUT "RT" DUCT PRESSURE 20 PSI, "LT" 50 PSI, LT FLUCTUATING =- 5PSI, 45 TO 55PSI, AT LEVEL OFF AT 360 BOTH STABILIZED AT 42 PSI. ACFT GROUNDED. ACCOMPLISHED NR 1 ENGINE BLEED AIR HEALTH CHECK IAW NG-36WC-00001. R & R NR 1 ENGINE HIGH STAGE REGULATOR IAW AMM 36-11-07-000/400-801. ACCOMPLISHED BLEED AIR OPS TEST & REPAIR CONFIRMATION FOR NR 1 & NR 2 ENGINE IAW AMM 36-11-00-710-801 & FIM 36-10, TASK 807.