SDR AALA201909239029

Service difficulty report · Relay · Boeing 737823

Difficulty date: September 19, 2019
Submitted: September 23, 2019
Operation: Air carrier
Aircraft: N354PT
Make and model: Boeing 737823
Aircraft serial: 31275
Aircraft time: 6,299 hours, 2,600 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Relay
Part number: 172934001
Condition: Faulty
Location: Zone 100
Stage of operation: CR
How discovered: O
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

AIRCRAFT WAS GROUNDED: PILOT REPORTS DURING CRUISE BOTH FMC BLANKED AFTER 15 SECONDS, BOTH DISPLAYS CAME BACK ON BUT FMC PROMPT WAS MISSING AFTER 30 MORE SECONDS BOTH FMCS RETURNED TO NORMAL OPS. MAINTENANCE REPLACED FMC XFR RELAY POSITION 1 IAW AMM 34-61-00, OPS CHECK GOOD, NO FAULTS FOUND.