Service difficulty report · Autothrottle Sys · Boeing 74787UF

Difficulty date
October 16, 2019
Submitted
October 25, 2019
Operation
Air carrier
Aircraft
N853GT
Make and model
Boeing 74787UF
Aircraft serial
37572
Aircraft time
30,747 hours, 4,512 cycles
Part
Autothrottle Sys
Condition
Malfunctioned
Stage of operation
TO
How discovered
O
Nature of condition
O
Precautionary procedure
C

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

What was found

AUTO THROTTLES DID NOT ENGAGE AFTER DEPRESSING TO/GA SWITCH, REJECTED T/O AT APPROX 110 KTS. RTB WITH BRAKE TEMPS AT 5.0. PERFORMED HIGH ENERGY STOP INSPECTION IAW AMM 05-51-10, NO DEFECTS NOTED. CYCLED L AND R FMC, AND FMC SERVO CIRCUIT BREAKERS. PERFORMED GROUND TESTS IAW AMM 34-61-00 AND AUTO UNIQUE GROUND TEST IAW AMM 22-10-00. ALL TESTS PASSED. A/C RETURNED BACK TO CAT IIIB STATUS AND CAT PLACARD ROTATES BACK TO CAT IIIB.

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