# SDR DALA2026040802241

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 1, 2026
- Submitted: April 8, 2026
- Operation: Air carrier
- Aircraft: [N177DN](https://openairdocs.org/aircraft/N177DN), registered now
- Make and model: Boeing 767332
- Aircraft serial: 25122
- Aircraft time: 147,732 hours, 21,739 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Condition: Damaged
- Location: Zone 100
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026040802241

## Discrepancy

DURING L ENG START AT 50% WHEN ENG START SELECT CYCLED TO AUTO A STRONG BURNING SMELL (BURNING PAPER & RUBBER) WAS SMELLED.  FOUND LT AND RT RECIRC CHECK VALVES DAMAGED AND LT RECIRC VLV WAS INJESTED INTO LT RECIRC FAN RMVD LT&RT CHECK VLV AND LT RECIRC FAN. (7800198) (AIRCRAFT GROUNDED)

---
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.