# SDR IPXA2025021905505

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 18, 2025
- Submitted: February 19, 2025
- Operation: Air carrier
- Aircraft: [N423UP](https://openairdocs.org/aircraft/N423UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25325
- Aircraft time: 34,955 hours, 22,913 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Fseu
- Part number: 285N001140
- Part serial: D01417
- Condition: Faulted
- Location: Zone 700
- Stage of operation: CL
- 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/IPXA2025021905505

## Discrepancy

**ATB** AFTER TAKEOFF MASTER WARNING GEAR NOT DOWN FOLLOWED BY GEAR DOOR. JACKED AIRCRAFT. RETRACTED LANDING GEAR.IMMEDIATELY HAD GEAR NOT DOWN WARNING. FOUND WARNING WOULD CEASE WITH #1 FSEU REMOVED FROM RACK.. REPLACE #1 FSEU PER MM 27-51-01-422-011. NO WARNINGS WITH GEAR UP AND THROTTLES ADVANCED. AFTER REPLACEMENT OF #1 FSEU ACCOMPLISHED GEAR RETRACTION. NO WARNINGS OCCURRED. REF. SSM 31-51-04.

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