SDR ASAA12511495

Service difficulty report · Nozzle · Boeing 737890

Difficulty date: May 4, 2012
Submitted: May 4, 2012
Operation: Air carrier
Aircraft: N596AS
Make and model: Boeing 737890
Aircraft serial: 35688
Aircraft time: 15,258 hours, 4,886 cycles
Engine: Cfmint CFM567B273
System (JASC): 4930 · APU Engine Fuel and Control
Part: Nozzle
Part number: 38304161
Condition: Failed
Location: Apu Fuel
Stage of operation: IN
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

APU CT5ATP EGT TREND DATA SHOWS EGT HAS SHIFTED ABOVE THE ESTABLISHED THRESHOLD. ACFT GROUNDED. REMOVED ALL FUEL NOZZLES IAW MM 49-31-14, STEPS A, E. INSTALLED FUEL NOZZLES IAW MM 49-31-14, STEPS A, F. ACCOMPLISHED STEPS G AND H MM 49-31-14-400, LEAK CK GOOD.