Service difficulty report · Control Unit · Boeing 747

Difficulty date
May 5, 2022
Submitted
May 10, 2022
Operation
Air carrier
Aircraft
N356KD
Make and model
Boeing 747
Aircraft serial
26356
Aircraft time
80,406 hours, 16,489 cycles
Engine
Ge CF680C2B1F
Part
Control Unit
Part number
746013J
Part serial
0698
Condition
Broken
Location
Zone 100
Stage of operation
AP
How discovered
V
Nature of condition
G
Precautionary procedure
K

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

What was found

THRUST LEVERS NON-RESPONSIVE WHEN MANUALLY INCREASED WITH AUTO THROTTLES ENGAGED. AP FAIL / AUTO THROTTLES FAIL. R & R #2 BCU IAW MM 24-23-01. AUTO LAND/AUTO THROTTLES NOW SATIS. OPS TEST OF FCC, L,C,R IAW MM 22-10-00 PASS TEST SATIS. TEST OF FMC AND FMC SERVO LOOP FOR AUTO THROTTLE SYSTEM PASS SATIS IAW MM 34-61-00.