# SDR CALA2026082718954

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2026
- Submitted: August 27, 2026
- Operation: Air carrier
- Aircraft: [N839UA](https://openairdocs.org/aircraft/N839UA), registered now
- Make and model: Airbus A319-131
- Registry model: [Airbus A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (OpenAirDocs)
- Aircraft serial: 1507
- Aircraft time: 73,444 hours, 33,072 cycles
- Engine: Iae V2522A5
- System (JASC): [5311 · Fuselage Main, Frame](https://openairdocs.org/jasc/5311)
- Part: Frame
- Part number: DS31124240000
- Condition: Cracked
- Location: Fr 16
- Stage of operation: IN
- How discovered: E
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026082718954

## Discrepancy

LEFT FRAME 16, HOLE NR 4 REPAIRED ON NR 3576/9290576.   LT FRAME 16 HOLE NR 4 REPAIRED IAW 53-11-12-300-012. CRACK WAS FOUND DURING THE ISBS REF FIG 1 SHT 1 STEP 2. CRACK FOUND IN FRAME LAYER PER FIG 002 REF FIG 1 SHT 1 STEP 3. CRACK WAS FOUND WITHIN CONCERNED LAYER PER FIG 003 REF FIG 1 SHT 1 STEP 4. HOLE 4 WAS FOUND AT ORIGINAL NOMINAL DIAMETER OF .3110 IAW FIG 004 REF FIG 1 SHT 1 STEP 5. DAMAGE FOUND AT LH FR16 HOLE 4 REF FIG 1 SHT 1 S TEP 7.  FIRST OVERSIZED HOLE TO A DIAMETER OF .3270, DEFECT STILL NOTED. 2ND OVERSIZED HOLE 4 TO A DIAMETER OF .3420 REF FIG 1 SHT 1 STEP 9. PERFORMED ROTO PROBE INSP, HOLE 4 FOUND DEFECT FREE AT A DIAMETER OF .3420 REF FIG 1 SHT 2 STEP 12-13.  ASSOCIATED HOLE AS HOLE 3, HOLE FOUND TO HAVE A NOMINAL DIAMETER OF .2500, NOT OVERSIZED REF FIG 1 SHT 2 STEP 21-22. HOLE 4 IDENTIFIED AS LEADER HOLE, AND HOLE 3 IDENTIFIED AS ASSOC IATED HOLE REF FIG 1 SHT 2 STEP 24.

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