SDR ASAA2021052434968

Service difficulty report · Fmc · Boeing 737890

Difficulty date: May 24, 2021
Submitted: June 1, 2021
Operation: Air carrier
Aircraft: N596AS
Make and model: Boeing 737890
Aircraft serial: 35688
Aircraft time: 47,188 hours, 14,064 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Stage of operation: TX
How discovered: O
Nature of condition: O
Precautionary procedure: O

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

What was found

FMC PER INIT DATA AND T/O DATA WONT LOAD. TURNED OFF AIRPLANE AND BACK ON PROBLEM PERSISTS. GROUNDED - YES. C/W 737-800 FIM 34-61 TASK 899 RESET FMC'S, VERIFIED FMCS - DISPLAYS - CDU - PERF INIT PAGE PROMPTS PER B737-800 SDS 34-61-00-037 & B737-800 AMM TASK 34-61-00-710-801 ALL PROMPTS NORM. OPS TEST GOOD. C/W ACARS - OPERATIONAL TEST REF AMM TASK 23-27-00-740-806-004. ALSO VERIFIED TRHU TEXT MSG WITH DISPATCH. OPS TEST GOOD. COULD NOT DUPLICATE FAULT.