# SDR IPXA2026011406798

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 14, 2026
- Submitted: March 5, 2026
- Operation: Air carrier
- Aircraft: [N142UP](https://openairdocs.org/aircraft/N142UP), registered now
- Make and model: Airbus A300 F4-622R
- Registry model: [Airbus A300 F4-622R](https://openairdocs.org/model/airbus-a300-f4-622r) (OpenAirDocs)
- Aircraft serial: 0825
- Aircraft time: 28,985 hours, 17,602 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Warning Light
- Part number: 321490U
- Part serial: 002136
- Condition: Inoperative
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2026011406798

## Discrepancy

ON PREFLIGHT, L1 RED WARNING LIGHT DOES NOT ILLUMINATE WHEN TESTED. BUZZER DOES SOUND. FOUND ASPSU WITH RED LIGHT DISPLAYED ON UNIT POSITION. REMOVED AND REPLACED APSU 70WN AND OPERATION CHECKS GOOD IAW AMM 52-73-18/401. THIS CLEARS DMI, PLACARD REMOVED. NO DMP FOR THIS MEL.

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