Service difficulty report · None · Boeing 737900ER

Difficulty date
March 7, 2022
Submitted
March 7, 2022
Operation
Air carrier
Aircraft
N66831
Make and model
Boeing 737900ER
Aircraft serial
44562
Aircraft time
24,884 hours, 8,836 cycles
Part
None
Part number
NA
Condition
Faulted
Location
Na
Stage of operation
UK
How discovered
O
Nature of condition
O
Precautionary procedure
A

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

What was found

FMC VNAV CLIMB MODE INDICATES FLAPS 1 MIN SPEED WITH FLAPS AT 0 NOT ATTEMPT A CB RESET OR FMC TRANSFER. CREW HAD NO OTHER ALSO NO FAULTS. ABNORMAL INDICATIONS AND FLAPS INDICATED CORRECT WITH FLAP HANDLE POSITION FLIGHT CREW REPORTEDAT 10K FT. THEY PUT FLAPS ALL THE WAY UP AT PER FLIGHT CREW AUTOPILOT NOT ENGAGED FOUND DFCS FAULT ON LAST FLIGHT LEG. "22-11822" SAME FAULT ON PSEU BITE SHOWED NO FAULTS AS WELL BOTH SMYD 1 AND 2 SHOWED "FMC DATA INVALID" FAULTS MX MSG 0 AND FMC WAS STILL INDICATING "CLIMB" PHASE WITH MAX SPEED BOTH CH A AND B. REF FIM 22-11 TASK 811 PERFORMED DFCS CURRENT 27-31026 AND 27-32026. SMYD FLAP POSITION DISCRETES SHOWED ALLOWED 250KNOTS. THEY DESCENDED BACK TO 10K FT AND CYCLED FLAPS FAULTS AND TEST PASSED, PERFORMED ADIRS BITE TEST AND NO FAULTS CORRECT WITH FLAP POSITION TO SEVERAL POSITIONS 1-5AND BACK TO 0 AND NO CHANGE. THEY DID AND ENG 1 AND 2 EEC BITE AND NO FAULTS, DEU 1 AND 2 BITE AND REPLACED FMC# 1 PER AMM 34-61-02 . PERFORMED SOFTWARE CROSSLOAD AND VERIFIED SOFTWARE AS CORRECT PER LRU SOFTWARE NON 787 CONFIGURATION PAGES. FMC #1 BITE PASSED. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1017823 SN OFF 3159 COMPUTER, FLT M OFF 29-3461-9-0001 3159 ON 29-3461-9-0001 0276

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