SDR ASAA2018031723938

Service difficulty report · Annunciator · Boeing 737990ER

Difficulty date: March 17, 2018
Submitted: March 19, 2018
Operation: Air carrier
Aircraft: N407AS
Make and model: Boeing 737990ER
Aircraft serial: 41731
Aircraft time: 21,269 hours, 6,895 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Annunciator
Condition: Malfunctioned
Stage of operation: CR
How discovered: O
Nature of condition: N
Precautionary procedure: O

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

What was found

THRUST MODE ANNUNCIATOR SHOWS "CRZ" AFTER VNAV LEVEL OFF, AT CRUISE ALTITUDE. SHOULD REMAIN IN "CLB" WITH U.11. ACFT GROUNDED. RELOADED NDB SOFTWARE IAW AMM 34-61-00-470-805. ACCOMPLISHED FMC SOFTWARE CONFIGURATION CHECK IAW AMM 34-61-00-750-801. SOFTWARE IS UP TO DATE.