SDR ASAA2023012841715

Service difficulty report · Unknown · Boeing 737890

Difficulty date: January 28, 2023
Submitted: January 31, 2023
Operation: Air carrier
Aircraft: N557AS
Make and model: Boeing 737890
Aircraft serial: 35176
Aircraft time: 60,791 hours, 17,665 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Unknown
Part number: UNKNOWN
Condition: Unknown
Location: Unknown
Stage of operation: NR
How discovered: V
Nature of condition: J
Precautionary procedure: K

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

What was found

UPON SELECTING LNAV, FMA SHOWS NO LNAV OR A FLASHING LNAV INDICATION. WILL NOT INDIDCATE SOLID ARMED LNAV. GROUNDED - YES. ACCOMPLISHED FMC BITE PER B737-800 FIM 34-61-801 TASK. NO FAULTS FOUND. ACCOMPLISHED DFCS BITE CHK PER TASK FIM 22-11-801. NO FAULTS FOUND. ACCOMPLISHED ADIRS BITE PER FIM 34-21-TASK 801. NO FAULTS FOUND. L/NAV AND V/NAV DO ARM ON MODE CONTROL PANEL. RA#1 CURRENTLY ON ASA MEL34-20E. L/NAV ON FMA, MAY FLASH ON DEACTIVATED ALTIMETER SIDE, AS STATED IN OPERATIONS PROCEDURE LISTED FOR MEL 34-20E.