# SDR CALA2026091519424

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 13, 2026
- Submitted: September 15, 2026
- Operation: Air carrier
- Aircraft: [N671UA](https://openairdocs.org/aircraft/N671UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 30026
- Aircraft time: 93,171 hours, 18,462 cycles
- Engine: Pwa PW4060
- System (JASC): [3412 · Outside Air Temperature Indicator/Sensor](https://openairdocs.org/jasc/3412)
- Part: Tat Probe
- Condition: Faulted
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: G
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026091519424

## Discrepancy

LOSS OF ALL TAT DATA CLIMBING THROUGH 330 LOSS OF AP/AT LNAV/VNA V TCAS/WINDSHEAR TROUBLESHOT IAW SSM 34-12-01-103. FOUND TAT PROBE TS161L AT FAULT. R & R TAT PROBE IAW AMM 34-12-02-401. PERFORMED TAT PROBE TEST IAW AMM 34-12-02-404-008. PROBE TESTED GOOD. OTHER AFFECTED SYS STILL REQUIRE OPS CHKS.   OPS TESTS OF AFFECTED SYS COMPLETED, REF. L/P 3333484 FOR GPWS OPS TEST 34-46-00-715-141-006. REF. L/P 3333346 FOR EPR IND.  AMM 22-32-00-715-001 AND A/T AND A/P MCDP TESTS 10, 11, AND 12 FIM 22-03-00/101. REF L/P 3333483 FOR TCAS OPS TEST 34-45-00-715-239-001. ACFT REQUIRES GROUND TEST 30 DUE TO CAT SYSTEMS BEING AFFECTED AS A RESULT OF LOSS OF ALL TAT DATA.

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