Service difficulty report · Tachometer · Airbus A321231

Difficulty date
June 13, 2021
Submitted
June 23, 2021
Operation
Air carrier
Aircraft
N925UY
Make and model
Airbus A321231
Aircraft serial
6613
Aircraft time
19,726 hours, 7,609 cycles
Part
Tachometer
Part number
C201050002
Part serial
70513
Condition
Defective
Location
Lt Mlg
Part time
19,725 hours, 7,608 cycles
Stage of operation
LD
How discovered
O
Nature of condition
M
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: AFTER LANDING LEFT MAIN BRAKE TEMP INCREASED RAPIDLY UPON GATE ARRIVAL BOTH LEFT MAIN TIRES BLEW. PREFORMED INSPECTION OF LEFT MAIN LANDING GEAR AXLE PER AMM 32-11-00-200-007 AND FOUND TO BE WITHIN LIMITS FOR HARDNESS CHECK. REPLACED MAIN LANDING GEAR #1 (AALA202106149012) AND #2 (AALA202106229009) BRAKE ASSEMBLIES PER AMM 32-42-27. REPLACED MAIN LANDING GEAR #1 (AALA202106229010) AND #2 (AALA202106229011) WHEEL ASSEMBLIES PER AMM 32-41-11. REPLACED #1 (AALA202106229012) AND #2 (AALA202106229013) TACHOMETERS PER AMM 32-42-57. REPLACED BRAKE TEMPERATURE MONITOR UNIT (AALA202106229014) PER AMM 32-47-18. A SATISFACTORY OPERATIONAL CHECK OF ALL REPLACED ITEMS AND THE BRAKING SYSTEM WAS ACCOMPLISHED.

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