# SDR AALA202308221262

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 2023
- Submitted: August 22, 2023
- Operation: Air carrier
- Aircraft: [N866NN](https://openairdocs.org/aircraft/N866NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 40584
- Aircraft time: 37,637 hours, 15,829 cycles
- System (JASC): [2613 · Overheat Detection](https://openairdocs.org/jasc/2613)
- Part: Detector
- Part number: 90201601
- Condition: False Indication
- Location: Zone 400 - Nac/P
- Stage of operation: CL
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202308221262

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO DFW DUE TO ENGINE #1 OVERHEAT LIGHT ILLUMINATED ON INITIAL CLIMB. THE AIRCRAFT LANDED SAFELY AT DFW WITHOUT FURTHER INCIDENT. **SUPPLEMENTAL REPORT FOR AALA202308214097: MAINTENANCE REPLACED #1 ENGINE UPPER FAN FIRE/OVERHEAT DETECTOR ASSEMBLY M1757 (AALA202308214097), LOWER FAN DETECTOR ASSEMBLY M1758 (AALA202308221262), LEFT CORE DETECTOR ASSEMBLY M1759 (AALA202308221394), RIGHT CORE DETECTOR ASSEMBLY M1760 (AALA202308220767) PER AMM 26-11-01.** (CLOSED)

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