Service difficulty report · Connector · Boeing 737990

Difficulty date
March 28, 2021
Submitted
April 1, 2021
Operation
Air carrier
Aircraft
N431AS
Make and model
Boeing 737990
Aircraft serial
43255
Aircraft time
27,777 hours, 8,965 cycles
Part
Connector
Condition
Broken
Location
Cockpit - Fms
Stage of operation
IN
How discovered
9
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

FCC BITE INHIBITED WHEN FMS-2 DATA SELECTED. REF B737-900 WDM 34-61-14, WIRES W0523-2769 B&R 24 NOT INSTALLED IN FMC-2 CONNECTOR D3261A PINS G9& H9. E5-2 RACK REMOVED FOR ACCESS. GROUNDED - YES. REF B737-900 WDM 34-61-14 PAGE 7A WIRE W0523-2769-24 NOT PRESENT AT D3216A PINS G9 AND H9 OR AT TB524 YAS OR YAB, AND NOT FOUND IN WIRE BUNDLE BETWEEN THOSE TWO POINTS REF WDM 34-58-21 FOUND WIRE W0523-2788-24R TO BE BROKEN AT SPLICE SM62 ADJACENT TO D3261. REPAIRED WIRES W0523-2788-24 AND W0523-2789-24 PER SWPM 20-30-12. FABRICATED AND INSTALLED WIRE W0523-2769-24 PER SWPM 20-10-11, 20-71-14 AND PERFORMED WIRING CHECKS FOR FMC AND GOGO WIRING PER TSR710677-ALL WIRING CHECKS GOOD. E5 COOLING HOSE DUCTS INSTALLED AND SECURED. MOUNTING HARDWARE INSTALLED PER B737-900 AMM 20-50-11 AND IPC 25-50-52-22A.