SDR ASAA2014040607455

Service difficulty report · Warning Message · Boeing 737990ER

Difficulty date: April 6, 2014
Submitted: April 8, 2014
Operation: Air carrier
Aircraft: N419AS
Make and model: Boeing 737990ER
Aircraft serial: 41734
Aircraft time: 4,143 hours, 1,323 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning Message
Condition: False Activation
Location: Fmc
Stage of operation: TX
How discovered: O
Nature of condition: N
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

F/O'S PFD INDICATES "NO VSPD" AND "LND ALT" AMBER FLAGS. CAPT'S PFD NORMAL. ACFT GROUNDED. RESET CIRCUIT BREAKER FMC 2, FAULT DID NOT CLEAR, CYCLED FMC TRANSFER SWITCH TO BOTH ON "L" AND BACK TO NORMAL AND FAULT CLEARED. ACCOMPLISHED FMCS BITE PROCEDURE TO RT SIDE IAW FIM 34-61, TASK 801, SENSOR STATUS AND INFLIGHT FAULTS SHOWED NO FAULTS. ACFT OK FOR SVC.