# SDR CALA2026050415929

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 1, 2026
- Submitted: May 4, 2026
- Operation: Air carrier
- Aircraft: [N34131](https://openairdocs.org/aircraft/N34131), registered now
- Make and model: Boeing 757224
- Aircraft serial: 28971
- Aircraft time: 101,942 hours, 21,769 cycles
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Sensor
- Part number: 871601
- Condition: Faulted
- Location: Zone 700
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026050415929

## Discrepancy

GEAR DISAGREE EICAS MEET CREW, WITH GEAR IN UP POSITION, ALL 3 GEAR LIGHTS WENT OUT BUT YELLOW GEAR DISAGREE LIGHT CAME ON NEXT TO GEAR INDICATION AND CREW ALSO GOT GEAR DISAGREE EICAS MESSAGE. CREW DID NOT PLACE GEAR IN OFF POSITION. ON APPROACH GEAR DOWN WORKED NORMALLY. FOUND NO EICAS MESSAGES. TECH SUPP UPDATE: PSEU BITE ACP'D PER FIM 32-09/804. FLT FAULTS SHOW CODES 065, 078, 421, 422, 423, 424 IN ORDER FROM MOST RECEN T TO OLDEST. CODES 421, 422, 423, 424 LIKELY ASSOCIATED WITH PRE V FAULT ON L/P 8500186. SPECIFIC FLIGHT LEGS NOT SHOWN ON PSEU. NEED TO FOCUS ON CODES 065 & 078. PSEU ALL TEST "505" FAULTS CAR D 3, ALSO INDICATES POSSIBLE TARGET GAP OR SENSOR ISSUE WITH S10 078. TECH SUPP UPDATE: FOR NLG LOCKED SENSORS S10065 AND S10078, ACCO MPLISH TARGET GAP CHECK PER AMM 32-61-03-822-038 PARA D.4 AND IN DUCTANCE & RESISTANCE TEST PER AMM 32-61-00-765-196. RECORD RESU LTS ON THIS L/P. PROCEED WITH R&R OF S10065 AND S10078. WHILE SE NSORS ARE DISCONNECTED, ACCOMPLISH FOLLOWING MEG CHECKS:PSEU D32 10E PIN J2-GND, PIN K2-GND, PINS J2-K2 AND PSEU D3210A PIN E1-GN D, PIN F1-GND, PINS E1-F1. VERIFY NO SHORTS EXIST. AFTER R&R OF SENSORS, RE-VERIFY PROPER TARGET GAP AND INDUCTANCE READINGS. RE-ACCOMPLISH PSEU BITE PER FIM 32-09/804. ENSURE S10065 AND S10078 TARGET TEST PASS AND PSEU ALL TEST 505 PASSES, THE CLEAR PS.

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