# SDR ASAA2016022115615

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 21, 2016
- Submitted: February 23, 2016
- Operation: Air carrier
- Aircraft: [N581AS](https://openairdocs.org/aircraft/N581AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35188
- Aircraft time: 33,933 hours, 10,278 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7720 · Engine Temperature Indicating System](https://openairdocs.org/jasc/7720)
- Part: Probe
- Part number: TC29603
- Condition: Failed
- Location: Nr 1 Engine
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016022115615

## Discrepancy

WHILE ACCOMPLISHING TC 78273000, NR 1 ENGINE RECENT FAULTS, FAULT HISTORY DISPLAY FAULT 73-31371, UPPER EGT SECTORS READING HIGH.  FLT LEGS 2,4  AND 10, FAULT IS ECONOMIC. ACFT GROUNDED. ACCOMPLISHED FIM 73-11, TASK 801, STEP E5 C1.  S4, 125 DEGREES LOWER THAN OTHER 3.  ACCOMPLISHED FIM 77-05, TASK 801, PROBE S4 MORE THAN 50 DEGREES DIFFERENT THAN OTHER 3.  R & R S4 REF AMM 77-21-01. OPS GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.