SDR DALA2025072905707

Service difficulty report · Tachometer · Airbus A321211

Difficulty date: July 28, 2025
Submitted: July 30, 2025
Operation: Air carrier
Aircraft: N387DN
Make and model: Airbus A321211
Aircraft serial: 9025
Aircraft time: 18,906 hours, 8,170 cycles
System (JASC): 3240 · Landing Gear Brake System
Part: Tachometer
Condition: Failed
Location: Brake
Stage of operation: TO
How discovered: O
Nature of condition: J
Precautionary procedure: C

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

What was found

RTO AT 70KTS DUE TO A BRAKES RELEASED ECAM MESSAGE WITH A TACH 1 FAILURE MESSAGE. FAILED TACH 1 SPIN-UP TEST. BRAKE COOLING FAN ALSO HAD THE SHROUD, IMPELLER, GUARD, & FAN SUPPORT LOOSE. REPLACED BSCU, TACH GENERATOR 1 AND FAN ASSEMBLY.

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