# SDR IPXA2021061870743

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 18, 2021
- Submitted: June 21, 2021
- Operation: Air carrier
- Aircraft: [N273UP](https://openairdocs.org/aircraft/N273UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48574
- Aircraft time: 71,679 hours, 14,731 cycles
- System (JASC): [5210 · Passenger/Crew Doors](https://openairdocs.org/jasc/5210)
- Part: Warning Message
- Condition: False Activation
- Location: Pax Door
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2021061870743

## Discrepancy

CABIN DOOR FWD L LEVEL ONE ALERT IN FLIGHT FL310 CABIN ALT US50 DP 8.1 (IT ALSO WENT AWAY BEFORE ANYTHING CHANGED.  REF M747491 MEL 52 40 1 1 0 1 CABIN DOOR FWD L LEVEL 1 MESSAGE MAYBE DISPLAYED.INSPECTED L1 DOOR CLOSE LIMIT SWITCH (S1-248) AND GIRT BAR ARM SWITCH (S1-590).  FOUND GIRT BAR ARM SWITCH FAULTY & CORRODED.  R/R'D SWITCH (S1-590) IAW MD11 AMM 52-11-02-501.  R/R'D CONNECTOR P1 1882 PRECAUTIIONARY IAW SWPM 20-31-00.  OPS CHKS GOOD ON GROUND AT THIS TIME.  M747491 CLOSED. ESR MD11 IPC 52-11-70-01.

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