Service difficulty report · Fuel Control · Boeing 737890

Difficulty date
September 1, 2012
Submitted
September 18, 2012
Operation
Air carrier
Aircraft
N506AS
Make and model
Boeing 737890
Aircraft serial
35690
Aircraft time
16,355 hours, 5,234 cycles
Engine
Cfmint CFM567B27
Part
Fuel Control
Part number
4419215
Part serial
CUC15324
Condition
Malfunctioned
Location
Apu
Part time
4,224 hours, 7,052 cycles
Stage of operation
NR
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

FAULT LIGHT DURING INFLIGHT APU START. PERFORMED APU BITE CHECK, REF AMM 49-61-00. FOUND APU FAULTS FAULT HISTORY - FAULT 49-41010. NO ACCELERATION SHUTDOWN WITH 5 FLIGHT OCCURRENCES. FOUND APU FAULT -MX HISTORY - FAULT 49-31171, FUEL CONTROL UNIT FLOW DISAGREES WITH COMMAND - WITH 4 FLIGHT HISTORY OCCURRENCES. 2 OF THE ABOVE FLIGHT OCCURRENCES OVERLAP WITH EACH OTHER. PERFORMED FIM 49-31-00-810-808 INITIAL EVAL. NO FAULTS NOTED.