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SDR ASAA2013040494332

Open the Markdown

Service difficulty report · Fuel Nozzle · Boeing 737890

FAA SDR system

Difficulty date
April 4, 2013
Submitted
April 6, 2013
Operation
Air carrier
Aircraft
N589AS
Make and model
Boeing 737890
Aircraft serial
35686
Aircraft time
20,468 hours, 6,386 cycles
System (JASC)
4930 · APU Engine Fuel and Control
Part
Fuel Nozzle
Part number
38304161
Condition
Failed
Location
Apu
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. REMOVED FUEL NOZZLES IAW TASK 49-31-14-000-801, ITEM 2AE, 1-3 12292. DURING REMOVAL OF NOZZLES, 3 FASTNERS SHEARED AT 5, 7, 8 O`CLOCK POSITION REINSTALLED HARDWARE AND LINES IAW MM 49-31-14-400 3 A F AND 3 H. REPLACED, OPS AND LEAK CHECKED APU IAW T/C 78349000, 78349001, 78349016, 78349010.