SDR ASAA2014030407051

Service difficulty report · Nozzle · Boeing 737890

Difficulty date: March 4, 2014
Submitted: March 4, 2014
Operation: Air carrier
Aircraft: N529AS
Make and model: Boeing 737890
Aircraft serial: 35198
Aircraft time: 15,458 hours, 4,692 cycles
System (JASC): 4930 · APU Engine Fuel and Control
Part: Nozzle
Part number: 38304161
Condition: Malfunctioned
Location: Apu
Stage of operation: IN
How discovered: 9
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 DATA SHOWS EGT IS TRENDING TOWARDS ESTABLISHED THRESHOLD. ACFT GROUNDED. REMOVED ALL APU FUEL NOZZLES, REF AMM 49-31-14-000-801. INITIATED INSTALLATION OF ALL APU FUEL NOZZLES IAW AMM 49-31-14-400-801. STEP 3A-3F(G), APU REQUIRES INSTALLTION TEST AND LEAK CHECK OF FUEL NOZZLES. COMPLETED INSTALLTION OF APU FUEL NOZZLES IAW AMM 49-31-14-400-801, STEP 3G TO END. NO LEAKS NOTED FROM APU FUEL NOZZLES. APU OPS CHECKS NORMAL.