# SDR MEX2003050

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 1, 2003
- Submitted: March 26, 2003
- Operation: Air carrier
- Aircraft: N160PL
- Make and model: Doug MD-88
- Registry model: [Doug MD-88](https://openairdocs.org/model/mcdonnell-douglas-md-88) (OpenAirDocs)
- Aircraft serial: 49763
- Engine: Pwa JT8D*
- System (JASC): [2497 · Electrical Power System Wiring](https://openairdocs.org/jasc/2497)
- Part: Relay
- Condition: Damaged
- Location: Dc System
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MEX2003050

## Discrepancy

CAPTAIN REPORTED DC BUS OFF LIGHT TURN ON.  FAIL WAS CAUSED BY A TEMPORARY ELECTRICITY FAILURE IN JET WAY.  DURING CHECK, WAS DETECTED THE RELAY R2-21 DAMAGED.  AFTER RELAY WAS COOLED DOWN, THE ELECTRIC SYSTEM WAS RESETED AND WITH APU POWER WAS PERFORMED A TEST AND DC BUS OFF LIGHT TURNED OFF.  TEST WAS PERFORMED IAW MM, ALL CORRECT.

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