SDR CALA2026062517341

Service difficulty report · Adapter · Boeing 737824

Difficulty date: June 24, 2026
Submitted: June 25, 2026
Operation: Air carrier
Aircraft: N12221
Make and model: Boeing 737824
Aircraft serial: 28930
Aircraft time: 82,242 hours, 30,969 cycles
System (JASC): 5300 · Fuselage Structure (General)
Part: Adapter
Part number: 143A3181U26
Condition: Damaged
Location: Tcas Antenna
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

UPPER FUSELAGE STA 385, NR 2 TCAS ANTENNA MOUNTING SURFACE HAS MULTIPLE TOOLING MARKS. REQUIRES EVALUATION. REMOVED AND REPLACED TCAS ANTENNA ADAPTER AT UPPER FUSELAGE IAW DWG: 143A3180 REV V, PL:143A3180 REV J, SRM 51-40-02-0G -0 STEP 4, 51-40-05--0G-0, AMM 51-21-41-370-802, 51-21-72-370-80 4, AND 51-21-99-300-801.