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SDR ASAA2013032594268

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Service difficulty report · Eec · Boeing 737890

FAA SDR system

Difficulty date
March 25, 2013
Submitted
March 27, 2013
Operation
Air carrier
Aircraft
N588AS
Make and model
Boeing 737890
Aircraft serial
35685
Aircraft time
20,528 hours, 6,418 cycles
Engine
Cfmint CFM567B27
System (JASC)
7320 · Fuel Controlling System
Part
Eec
Condition
Malfunctioned
Location
Engine
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

WHILE RUNNING NR 1 ENGINE, FOUND MAINT MESSAGE DEU 2 BLEED DATA DISAGREE. NR 1 EEC BITE IAW MM 73-21-00-740-801-F00 SHOWED ONE OCCURRENCE OF SHORT TERM FAULT 73-11291 DEU-2 BLEED DATA DISAGREE. ACCOMPLISHED TROUBLESHOOTING FOR FAULT 73-11291 IAW FIM 73-24, TASK 804. DID NOT CONFIRM FAULT. ACCOMPLISHED FAULT ISOLATION IAW PARA G. ALL DEU BLEED INPUTS CHECKED NORMAL FOR BOTH DEU-1 AND DEU-2. ACCOMPLISHED REPAIR CONFIRMATION IAW PARA H ALL TESTS PASS. NR 2 EEC BITE IAW MM 73-21-00-740-801-F00. SHOWED ONE OCCURRENCE OF SHORT TERM FAULT 73-21292 DEU-2 BLEED DATA DISAGREE. ACCOMPLISHED TROUBLESHOOTING FOR FAULT 73-21292 PER FIM 73-24 TASK 804 INITIAL EVALUATION (EEC TEST) IAW PARA E DID NOT CONFIRM FAULT. ACCOMPLISHED FAULT ISOLATION IAW PARA G. ALL DEU BLEED INPUTS CHECK NORMAL FOR BOTH DEU-1 AND DEU-2. ACCOMPLISHED REPAIR CONFIRMATION IAW PARA H. ALL TESTS PASS.