Service difficulty report · Fmc · Boeing 737890

Difficulty date
July 17, 2010
Submitted
July 19, 2010
Operation
Air carrier
Aircraft
N568AS
Make and model
Boeing 737890
Aircraft serial
35183
Aircraft time
13,343 hours, 4,329 cycles
Part
Fmc
Part number
1762000101
Part serial
002659
Condition
Failed
Location
E&E Bay
Part time
13,357 hours, 4,335 cycles
Stage of operation
NR
How discovered
O
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

L & R FMC HAD 1.0+ XTK ERROR. WHEN PROCEEDING TO BTG VOR THE A BEAM POINTS REMAINED IN RT FMC WITH A ROUTE DISCONTINUITY AT THE DSD01 A BEAM. WHEN NEW A BEAM SELECTED IN THE L FMC. R FMC SHOWED DSDO1 & DSDO2 OVERLAPPING. STEADY "RATE " FAILURE LOGGED IN RT FMC. REPLACED RT FMC COMPUTER REF MM 34 61 02 00 801. OPENED & CLOSED C/B'S P6 1 D15 & D16. FMC OPS TEST OK REF MM 34 61 00 710 801 CROSS LOADED NAV DATA & VERIFIED OPS SOFTWARE U.10.7.