# SDR 2026FA0000528

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 18, 2026
- Submitted: June 18, 2026
- Operation: General aviation
- Aircraft: [N901XM](https://openairdocs.org/aircraft/N901XM), registered now
- Make and model: Agusta AW109SP
- Registry model: [Agusta AW109SP](https://openairdocs.org/model/agustawestland-aw109sp) (OpenAirDocs)
- Aircraft serial: 22422
- Aircraft time: 3,212 hours, 9,247 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Pressure Switch
- Part number: 109051267109
- Part serial: 5577
- Condition: Intermittent
- Location: Zone 100
- Part time: 647 hours, 1,898 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000528

## Discrepancy

THE MLG LEVER WAS IN UP POSITION, BUT THREE GREEN LIGHTS FOR THE GEAR (THE GEAR WAS DOWN) WITH ONE RED LIGHT SHOWING GEAR TRANSITION. MY AIRSPEED HAD EXCEEDED THE 140KT LIMIT FOR THE GEAR TO BE DOWN WHICH CAUSED THE AIRSPEED AUDIO. I ALSO NOTICED AN AMBER MASTER CAUTION AND FOUND THE CAUSE WAS A “MAIN UTIL PRE” CAUTION LIGHT. I IMMEDIATELY SLOWED DOWN TO 120KTS, NOTIFIED MY CREW WHAT WAS GOING ON, AND GOT OUT THE RED IPAD TO LOOK UP THE CAUTION IN THE QRH. I FOLLOWED THE STEPS IN THE QRH. THE FIRST STEP IS TO SELECT AUXILIARY MODE ON EDU2. I DID THIS AND NOTICED THE NORM UTILITY PRESSURE WAS 197, WHICH IS WELL BELOW THE LIMIT OF 500PSI.  HAD ALREADY SLOWED DOWN, AND I WANTED TO VERIFY THAT I WAS DOING THE CORRECT PROCEDURE. I HANDED THE RED IPAD TO MY PARAMEDIC AND ASKED HIM TO LOOK AND SEE IF THERE WAS ANYTHING THAT I MISSED. HE LOOKED AND FOUND THE PROCEDURE LANDING GEAR FAILD TO RAISE. HE READ THE PROCEDURE AND I DID THE TASKS. I CONFIRMED THAT THERE WERE NO TRIPPED LANDING GEAR CIRCUIT BREAKERS, CHECKED THAT THE GEAR SELECTOR WAS NOT IN THE EMER POSITION, AND CYCLED THE LANDING GEAR FROM UP TO DOWN. I NOTED THE THERE WERE THREE GREEN LIGHTS AND NO RED LIGHT. THIS PROCEDURE SAYS TO CONTINUE FLIGHT AND LIMIT AIRSPEED TO 140KTS (FRAGMENTS OF THE PILOT STATEMENT)

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