Service difficulty report · Reference Unit · Boeing 737752

Difficulty date
April 6, 2018
Submitted
April 9, 2018
Operation
Air carrier
Aircraft
N7886A
Make and model
Boeing 737752
Aircraft serial
35122
Aircraft time
36,877 hours, 17,580 cycles
Part
Reference Unit
Part number
HG2050AC07
Part serial
56015094
Condition
Faulty
Location
Nr 2
Stage of operation
CL
How discovered
O
Nature of condition
P
Precautionary procedure
A

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

What was found

DURING CLIMB OUT, LOST LNAV, VNAV AND SOME FMC FUNCTIONS INCLUDING ROUTE WHICH WENT INACTIVE. LOST SPEED BANDS AND SOME MCP FUNCTIONS. FLT DIRECTORS LOST. DIVERTED. AFTER TROUBLESHOOTING THE SYSTEM CAME BACK AFTER 10-15 MINS. R & R THE NR 2 AIR DATA INTERIAL REFERENCE DATA UNIT IAW MM.