# SDR CALA2011030700133

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 7, 2011
- Submitted: March 7, 2011
- Operation: Air carrier
- Aircraft: [N57111](https://openairdocs.org/aircraft/N57111), registered now
- Make and model: Boeing 757224
- Aircraft serial: 27301
- Aircraft time: 68,163 hours, 15,000 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Part number: 2156604A
- Part serial: 10425B
- Condition: Malfunctioned
- Location: E&E Bay
- Part time: 55,180 hours, 13,095 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: B, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2011030700133

## Discrepancy

DURING DEPARTURE, HEARD A THUMP OR BANG IN WHAT WE THOUGHT CAME FROM BELOW THE FO`S FLOOR SHORTLY AFTER WE STARTED SMELLING A VERY STRONG ELECTRICAL BURNING TYPE SMELL.  RETURN TO EWR.  SMELL REDUCED DURING DESCENT AND WENT AWAY F/O AWHILE BUT RETURNED DURING APPROACH REF LG PG 8695594 R&R OF FWD EQUIPTMENT EXHAUST DETECTOR ALSO FOUND FO`S EHSI SCREEN DEGRADED BRIGHTNESS.  REMOVED AND REPLACED PER MM 34-22-04 PAGEBREAK 401 OPS CHECK GOOD A/C SET UP FOR EVAL FLIGHT REF LG PG 8695595.

---
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.