Service difficulty report · Fmc · Boeing 737990ER

Difficulty date
August 6, 2023
Submitted
August 11, 2023
Operation
Air carrier
Aircraft
N479AS
Make and model
Boeing 737990ER
Aircraft serial
60576
Aircraft time
28,749 hours, 8,940 cycles
Part
Fmc
Part number
1762000101
Part serial
010494
Condition
Faulty
Location
E/E Shelf E5-2
Part time
25,340 hours, 7,875 cycles
Stage of operation
TO
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

ON T/O L FMC SEQENCED TO NEXT WAY POINT ON DEPARTURE. GROUNDED - YES. (RESOLVED ON W/O: 1964758 TASKCARD: N/R-00002 ) THE MEL IS ACTUALLY 34-36J, REMOVED AND REPLACED LH FMC COMPUTER IAW AMM 34-61-02-000-801 AND 34-61-02-400-801, ETOPS GROUND FUNCTIONAL OPS CHECK GOOD IAW AMM 34-61-00-710-801. SOFTWARE INSTALLED PER AMM 34-61-00/201 AND FMCS PERFORMANCE FACTORS ADJUSTED IAW AMM 34-61-00-800-801. ALTERNATE DEACTIVATION PROCEDURES PERFORMED PER MPM CH.5 05-07-01, TABLE 3. POWER RESTORED TO NORMAL AFTER MAINTENANCE. CLEARS MEL 34-36J, SEAMC WILL NOTIFIED OF ETOPS MAINTENANCE AND MEL CLEARANCE. AIRCRAFT CONFIGURATION CHANGE RESTORED TO NORMAL BY PUTTING FMC SWITCHING PANEL TO NORMAL.