# SDR CALA2026032014712

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 19, 2026
- Submitted: March 20, 2026
- Operation: Air carrier
- Aircraft: [N34455](https://openairdocs.org/aircraft/N34455), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 41743
- Aircraft time: 42,493 hours, 15,678 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Part number: 903146
- Condition: Damaged
- Location: Zone 400
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026032014712

## Discrepancy

ENG 1 FIRE LOOP A & B INOP. LOCKED BY TOMC SDR REQUIRED FOR AIR RETURN. UNLOCK FOR EWR STATION TO DO THE SDR REPLACED LOOP AND INSTALLED CANNON PLUG PARTS USED: 29-2611-9-0003,QTY :1 MFG PN ON - 902862 MFG SN ON - 25704 M&E SN ON - 05704 M&E PN ON - 29-2611-9-0003 MFG SN OFF - 58351 MFG PN OFF - 903146 ROTABLE PARTS CHG:TT # 1772677 SN OFF 8351 PN OFF 29-2611-9-0003 IPC REFERENCE # MFG SN OFF NOT ON AC M&E OFF 29-2611-9-0003 SN OFF 8351 - S/N ENTERED IS INVALID

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