# SDR ASAA2018040224093

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 2, 2018
- Submitted: April 2, 2018
- Operation: Air carrier
- Aircraft: [N407AS](https://openairdocs.org/aircraft/N407AS), registered now
- Make and model: Boeing 737-900ER
- Registry model: [Boeing 737-900ER](https://openairdocs.org/model/boeing-737-900er) (OpenAirDocs)
- Aircraft serial: 41731
- Aircraft time: 21,435 hours, 6,956 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7797 · Engine Indicating System Wiring](https://openairdocs.org/jasc/7797)
- Part: Probe
- Condition: Dirty
- Location: Egt
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018040224093

## Discrepancy

DIAGNOSTICS REPORTED THE NR 1 ENGINE TREND DATA SHOWED A SHIFT IN EGT HOT DAY MARGIN ALL OTHER PARAMETERS NORMAL. ACFT GROUNDED.  ACCOMPLISHED A NR 1 ENGINE EGT CLEANING IAW AMM 77-21-00-140-801.   ACCOMPLISHED EGT AND T49.5 SYSTEM INSPECTION IAW AMM 77-21-01-200-801-F00.  NO DEFECTS.  ALTERNATE DEACTIVATION PROCEDURES APPLIED AND REVERSED IAW CHAPTER 5 SECTION 7 TABLE 3.

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