SDR ASAA2014082608966

Service difficulty report · Warning System · Boeing 737990ER

Difficulty date: August 26, 2014
Submitted: August 29, 2014
Operation: Air carrier
Aircraft: N409AS
Make and model: Boeing 737990ER
Aircraft serial: 41733
Aircraft time: 6,268 hours, 2,004 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning System
Condition: Malfunctioned
Location: Vnav
Stage of operation: CL
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

DURING CLIMB, VNAV STUCK ON "ACT 216 CLB" WITH "TGT SPD" OF "313/.790" AT CRUISE ALT OPERATION NORMAL. ACFT GROUNDED. PERFORMED BITE CHECK OF FMC IAW AMM 34-61, TASK 801, NO FAULTS FOUND. PERFORMED BITE CHECK OF DFCS NO FAULTS FOUND REF AMM 22-11, TASK 801. NO HISTORY PAST 30 DAYS. OK FOR CONTINUED SERVICE.