SDR ASAA2015100713396

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: October 7, 2015
Submitted: October 9, 2015
Operation: Air carrier
Aircraft: N403AS
Make and model: Boeing 737990ER
Aircraft serial: 41730
Aircraft time: 11,624 hours, 3,738 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Faulted
Location: Left
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

DURING FLIGHT, VTK AND MAP MESSAGES WERE DISPLAYED ON CAPTAINS SIDE. POS SHIFT SHOWS THE LT FMC IS NOT FUNCTIONING. ACFT GROUNDED. UNABLE TO VERIFY DISCREPTION W/ A/C POWER UP AT REMOTE LOCATION. PERFORMED FIM 34-61, TASK 801, SENSOR TEST GOOD. IN-FLIGHT FAULTS SHOW PRESSURE POS LAT-RATE FAULT. PERFORMED FIM 34-61, TASK 824 INTERMITTENT FAULT. OPS NORMAL.