# SDR 04FDEA01473

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 26, 2004
- Submitted: June 3, 2004
- Operation: Air carrier
- Aircraft: N399FE
- Make and model: Doug DC-10-10
- Registry model: [Doug DC-10-10](https://openairdocs.org/model/mcdonnell-douglas-dc-10-10) (OpenAirDocs)
- Aircraft serial: 48262
- Aircraft time: 66,994 hours, 21,820 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Proximity Sensor
- Condition: Faulty
- Location: Cargo Door
- Stage of operation: AP
- 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/04FDEA01473

## Discrepancy

ON EXT FINAL TO MEM RECEIVED AN ALERT INDICATING THE MAIN CARGO DOOR WAS OPEN (B-LOOP).  DOOR WAS VERIFIED CLOSED BY FIRE/RESCUE PERSONNEL  AFTER LANDING.  RELEASED FOR SERVICE PER MEL/CDL: 52-40-01-06 CATEGORY: B EXPIRATION: 29MAY04 MEL 52-40-01-06: CARGO DOOR UPPER B ALERT INOP.  VERIFY DOOR IS CLOSED AND LOCKED PRIOR TO BLOCK-OUT.  REPLACED CARGO DOOR PROX SENSOR IAW MM 52-70-06-2.  OPS CHECKS GOOD.

---
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.