# SDR FDEA201809202632

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 20, 2018
- Submitted: September 20, 2018
- Operation: Air carrier
- Aircraft: [N578FE](https://openairdocs.org/aircraft/N578FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48458
- Aircraft time: 73,212 hours, 19,980 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Warning System
- Condition: Activated
- Location: Cockpit
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: I
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA201809202632

## Discrepancy

ALT FL350 CABIN ALTITUDE LEVEL 3 ALERT. FASE 1S TO QRH. REF FIM 21-33-00-2 FIG 103 CHECKED BOTH CPC'S FOR BLOCKAGE AND NONE FOUND. CFDS FAULTS ACC1 WITH PK 1  RAD ACT IN LAST LEG BUT NO CURENT FAULTS. DEFERED PACK NR 1 RAM AIR ACTUATOR WRI 21-52-1583. PERFORMED RTS ON ACC1, ACC2, ACC3, ESC, CPC1, CPC2 WITH NO FAULTS NOTED. CPC2 WAS ACTIVE WHEN FAULT ACCURED. R/R NR 2 CPC AS PRECAUTION REF AMM 21-31-04-2. ALL TEST GOOD  REF AMM 21-62-01-5 AND 21-08-01-5. A/C OK FOR SERVICE

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