Service difficulty report · Antenna · Boeing 7378

Difficulty date
April 14, 2025
Submitted
April 17, 2025
Operation
Air carrier
Aircraft
N300UB
Make and model
Boeing 7378
Aircraft serial
44506
Aircraft time
591 hours, 226 cycles
Part
Antenna
Condition
Faulted
Location
Zone 100
Stage of operation
CR
How discovered
O
Nature of condition
N
Precautionary procedure
O

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

What was found

AIRCRAFT WAS GROUNDED: REPEAT RECURRING ISSUE WITH GEAR WARNING HORN GOES OFF WHEN THROTTLES PULLED BACK, ALONG WITH 3 RED GEAR LIGHTS. HORN CUTOUT WILL SILENCE THE HORN.HAD TO REDUCE SPEED IN CRUISE AND WHEN THRUST WAS REDUCED, THE HORN WENT OFF. REPLACED LRRA SYSTEMS 1 (AALA202504165893) AND 2 (AALA202504170737) ANTENNAS AND TESTED GOOD, PER AMM 34-31-11. PERFORMED J/C 09C21031001 OPERATIONAL TEST LANDING GEAR LOGIC MODULE OUTPUT TO THE AURAL WARNING MODULE, NO FAULTS NOTED.

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