SDR ASAA2016011014721

Service difficulty report · Warning Message · Boeing 737890

Difficulty date: January 10, 2016
Submitted: January 12, 2016
Operation: Air carrier
Aircraft: N585AS
Make and model: Boeing 737890
Aircraft serial: 35683
Aircraft time: 32,247 hours, 9,660 cycles
Engine: Cfmint CFM567B273B3
System (JASC): 7320 · Fuel Controlling System
Part: Warning Message
Condition: Activated
Location: Engine
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

WHILE ACCOMPLISHING TASK CARD NR 78273000, INTEROGATE THE FMC CDU FOR ENGINE FAULTS, FOUND MSG NR: 73-31161, THE MECHANICAL OVERSPEED PROTECTION SIGNAL IS OUT OF RANGE, NR 1 ENGINE. THIS IS A LONG TIME FAULT. ACFT GROUNDED. ACCOMPLISHED FIM 73-21, TASK 801, INTERNAL ELECTRONIC ENGINE CONTROL FAULT AND ACCOMPLISHED NR 1 ENG ELECTRONIC ENGINE CONTROL TEST WITH NO FAULTS FOUND AND ACCOMPLISHED NR 1 ENGINE ACTUATORS TEST REF AMM 71-00-00-700-807-F00 WITH NO FAULTS FOUND. NO OTHER DEFECTS NOTED.