# SDR CALA2026070917626

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 7, 2026
- Submitted: July 9, 2026
- Operation: Air carrier
- Aircraft: [N66808](https://openairdocs.org/aircraft/N66808), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 42820
- Aircraft time: 38,791 hours, 14,323 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cabin
- Stage of operation: NR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026070917626

## Discrepancy

APU ELEBC KICKED OFF FOLLOWED BY STRONG ODOR OF BURN OF RUBBED THROUGHOUT ENTIRE ACFT PERFOMED APU BITE CHECK FOUND ONLY ONE FAULT 49-31171. FUEL CONTROL UNIT DISAGREES WITH COMMAND.   INSPECTED APU AND APU COMPARTMENT IAW TASK 49-11-00-860-801 NO ISSUES NOTED, ALSO PERFORMED TASK 36-00-00-860-803 ON PACK SYSTEM NO ISSUES NOTED , OPENED PACK SYSTEM COMPARTMENT NO DEFECTS NOTED, APU RUN WITH ELEC SYS ON AND AIR WITH PACK OPS CHKS NORMAL, NO RUBBER ODOR NOTICED REFERANCE OPS TEST, NO RUBBER ODOR NOTED, ACFT OK FOR SERVICE

---
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.