# SDR USAASB00138

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 8, 2000
- Submitted: July 12, 2000
- Operation: Air carrier
- Aircraft: [N337US](https://openairdocs.org/aircraft/N337US), registered now
- Make and model: Boeing 737301
- Aircraft serial: 23235
- System (JASC): [2613 · Overheat Detection](https://openairdocs.org/jasc/2613)
- Part: Fire Loop
- Part number: 6131508551
- Condition: Failed
- Location: Nr 2 Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAASB00138

## Discrepancy

PIT - FLT 2004 - ON CLIMB-OUT FROM PIT, EN ROUTE TO LGA, THE CREW NOTED AN ENGINE OVERHEAT WARNING ON THE NR 2 ENGINE.  THE A LOOP FOR THE NR 2 ENGINE WAS ON MEL AT THE TIME.  THE WARNING WAS AT FIRST INTERMITTENT THEN BECAME STADY AS THE AIRCRAFT CROSSED THROUGH 10,000 FEET.  CREW ACCOMPLISHED PROCEDURES AND SHUTDOWN THE NR 2 ENGINE.  AN EMERGENCY WAS DECLARED AND THE FLIGHT RETURNED TO FIELD AT PIT.  FLIGHT LANDED WITHOUT FURTHER INCIDENT.  TOTAL SINGLE ENGINE TIME WAS 13 MINUTES.  MAINTENANCE REMOVED AND REPLACED THE NR 2 ENGINE FIRE WARNING SOFT CORE HARNESS.  ALSO, REMOVED AND REPLACED THE NR 2 ENGINE FAN LOWER FIRE LOOP (P/N 6676) AND FIREWALL LOOP (P/N 6672-01).  OPERATIONAL CHECK GOOD.  RAN ENGINE TO

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