# SDR CALA2026070117496

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 29, 2026
- Submitted: July 1, 2026
- Operation: Air carrier
- Aircraft: [N30913](https://openairdocs.org/aircraft/N30913), registered now
- Make and model: Boeing 787-8
- Registry model: [Boeing 787-8](https://openairdocs.org/model/boeing-787-8) (OpenAirDocs)
- Aircraft serial: 35879
- Aircraft time: 46,536 hours, 5,632 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Part number: 200078702
- Part serial: 508859
- Condition: Faulted
- Location: Zone 200
- 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/CALA2026070117496

## Discrepancy

FWD ZONAL DRYER FAN FAILS, LATCHED MAINTENANCE MESSAGE 21-71211.   R & R FWD ZONAL DRYER IAW AMM 21-72-01-00A-720A.MESSAGE STILL PRESENT.  PERFORMED CMCF GROUND TEST 21 HUMIDITY CONTROL SYSTEM, SYSTEM, FORWARD ZONAL DRYER AND HUMIDIFICATION SYSTEMS TEST PASSED AND MESSAGE WENT AWAY. SMELL STILL EXISTS IN THE CABIN. REF LP 9439349 FOR NEW WRITE UP ON BURNING SMELL. CLEARING LOGPAGE SINCE FAULT FOR FWD ZONAL DRYER FAN IS CLEARED.

---
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.