Service difficulty report · Probe · Boeing 7377BD

Difficulty date
February 20, 2019
Submitted
February 22, 2019
Operation
Air carrier
Aircraft
N7742B
Make and model
Boeing 7377BD
Aircraft serial
33928
Aircraft time
40,474 hours, 20,695 cycles
Part
Probe
Part number
102LA2AG
Part serial
A69824
Condition
Faulty
Location
Tat
Stage of operation
CL
How discovered
O
Nature of condition
S
Precautionary procedure
O

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

What was found

DECLARED EMERGENCY, ON CLIMBOUT VERTICAL NAVIGATION DISCONNECTED, UNABLE TO RECONNECT. BOTH AUTOPILOT PILOTS WOULD NOT ENGAGE. COULD NOT MODIFY THE FMG WITH ANY INPUTS. TOTAL AIR TEMP DATA WAS MISSING ON THE CENTER DISPLAY UNIT. ENGINE N1 DIGITS ALSO MISSING. NO TRUE AIR SPEED READING ON THE DISPLAY UNITS. NO AMBER CAUTION LIGHTS ILLUMINATED. NO VERTICAL MODES ON THE MLP PANEL WORKED. R&R TOTAL AIR TEMPERATURE PROBE PER AMM.

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