# SDR FDEA202510282101

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 28, 2025
- Submitted: October 28, 2025
- Operation: Air carrier
- Aircraft: [N642FE](https://openairdocs.org/aircraft/N642FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48485
- Aircraft time: 79,140 hours, 19,554 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Controller
- Part number: 4059023903
- Part serial: 96030454
- Condition: Failed
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: S
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA202510282101

## Discrepancy

CAC MANF DECAY CK AT FL380. FOLLOWING THE  CHECK, LEVEL 1 AVNCS FAN OVRD, AIR SYS 3 OFF, AND  AIR SYS 2 OFF.  REMOVED AND REPLACED ENVIRONMENTAL SYSTEM CONTROLLER, ADJUSTMENT/TEST PASSED PER ABOVE REFERENCES.   REMOVED AND REPLACED ENVIRONMENTAL SYSTEM CONTROLLER, ADJUSTMENT/TEST PASSED.  PSC-1 AND PSC-2 R-T-S PASSED.   AIR SYSTEM TEST PASSED.  ACFT OK FOR SERVICE

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