SDR ASAA2022080139292

Service difficulty report · Datalink · Boeing 737890

Difficulty date: August 1, 2022
Submitted: August 2, 2022
Operation: Air carrier
Aircraft: N557AS
Make and model: Boeing 737890
Aircraft serial: 35176
Aircraft time: 59,089 hours, 17,169 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Datalink
Part number: UNKNOWN
Condition: Failed
Location: Unknown
Stage of operation: NR
How discovered: V
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

ATC LOGON W/CPDLC SHOWS FAIL WHEN LOGGING ON. GROUNDED - YES. VERIFIED, NO FAULTS ON FMC BITE, ACARS TEST NORMAL. CYCLED FMC CMPTR 1 & 2, CMU-1 AC & DC, VHF-3 C/B, FAIL MSG CLEARED FROM CPDLC LOGON PAGE. ACCOMPLISHED CPDLC FUNCTIONAL TEST REF B737-800 AMM 34-61-00-720-899 TEST PASS. AFTER LOG OUT, CPDLC NOW SHOWS READY, NO HISTORY PAST 30 DAYS.