SDR ASAA2023042543000

Service difficulty report · Unknown · Boeing 737990ER

Difficulty date: April 25, 2023
Submitted: April 26, 2023
Operation: Air carrier
Aircraft: N435AS
Make and model: Boeing 737990ER
Aircraft serial: 43292
Aircraft time: 35,442 hours, 11,181 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Unknown
Part number: UNKNOWN
Condition: Unknown
Location: Unknown
Stage of operation: DE
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

COPILOT CDU BLANKED AT 10000' ON DESCENT RESTORED WITHIN 1 MINUTE. GROUNDED - YES. PEFORMED FMC BITE ON L AND R POS, FOUND PGM FAULT FOR RH FMC, WITH NO OTHER ASSOCIATED FAULTS. REF B737-900 FIM 34-61 TASK 801 AND 837. ALL REQUIRED TESTS PASSED, DISPLAY FUNCTIONS NORMALLY.