# Service difficulty reports: N404QS A list on [N404QS](https://openairdocs.org/aircraft/N404QS.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR DXTA2026101510131](https://openairdocs.org/sdr/DXTA2026101510131.md): Wire Harness · defective · Oct 11, 2026 · N404QS · Emb EMB505 · Landing Gear System Wiring > ANTI-SKID FAIL CAS ILLUMINATED DURING GEAR EXTENSION ON APPROACH INTO LAS. CHECKLIST WAS COMPLETED AND LANDING WAS UNEVENTFUL, WITH SLOW, LIGHT BRAKE APPLICATION UNTIL ABOUT 100 YARDS BEFORE OUR EXIT TAXIWAY WHEN THE TIRE BLEW. I TAXIED THE AIRCRAFT VERY SLOWL - [SDR DXTA2026082509393](https://openairdocs.org/sdr/DXTA2026082509393.md): Interface Unit · faulted · Aug 22, 2026 · N404QS · Emb EMB505 · Landing Gear Position and Warning > IN CRUISE, MULTIPLE CAS MESSAGES AND X INDICATIONS ON ENGINE, ETC. NOSE GEAR INDICATION UNSAFE WHILE RETRACTED AND EXTENDED. WE PERFORMED A LOW PASS AND TOWER CONFIRMED ALL GEAR APPEARED DOWN. EMERGENCY EXTENSION WAS PULLED PER THE CHECKLIST. SOME CAS - [SDR DXTA2025121506074](https://openairdocs.org/sdr/DXTA2025121506074.md): Uplock · defective · Dec 10, 2025 · N404QS · Emb EMB505 · Landing Gear Position and Warning > AFTER SELECTING THE LANDING GEAR LEVER TO THE DOWN POSITION. WE RECEIVED 2 MAIN GEAR INDICATORS IN THE DOWN AND LOCKED POSITION (GREEN) AND THE NOSE INDICATOR WAS A RED HATCHED BOX. WENT AROUND, PER THE QRH WE CYCLED THE GEAR, RECEIVED 3 GREEN INDICATORS AND D - [SDR DXTA2025103105491](https://openairdocs.org/sdr/DXTA2025103105491.md): Battery Pack · discharged · Oct 29, 2025 · N404QS · Emb EMB505 · Emergency Lighting > LINE SERVICE AGENT FOUND EMERGENCY LIGHTS FLASHING ON RT SIDE OF ACFT. RECHARGED EMERGENCY LIGHTS. OPS CHECKED IAW AMM 33-52-00. - [SDR DXTA2025093005133](https://openairdocs.org/sdr/DXTA2025093005133.md): Structure · no discrepancy · Sep 28, 2025 · N404QS · Emb EMB505 · Standard Practices/Structures > DEPARTED MMUN, HEADING TO KAPF ABOUT 8 MINUTES OUT FROM LANDING ATC ADVISED US THAT THE CONTROLLERS FROM MEXICO SAID THAT A PART OF OUR AIRCRAFT FELL OFF THE PLANE AFTER DEPARTURE. DIVERTED TO RSW, DID A LOW FLY-BY, WAS TOLD ALL LANDING GEAR AND TIRES APPEARED - [SDR DXTA2025090404810](https://openairdocs.org/sdr/DXTA2025090404810.md): Fce · faulted · Sep 3, 2025 · N404QS · Emb EMB505 · Trailing Edge Flap Control System > FLAP FAILED BETWEEN 1 AND 2. REVIEWED PREVIOUS STEPS AND PROCEEDED WITH THE FOLLOWING: SWAPPED FCE 1 & 2. PERFORMED RIGGING OF FLAP SYSTEM FOR FCE 1 AND PERFORMED OPS CHECKS OF FLAP SYSTEM S TIMES IAW AMM. WORK DONE IAW EMB-505 AMM 27-50-00. PERFORMED RIGGIN - [SDR DXTA2025080504448](https://openairdocs.org/sdr/DXTA2025080504448.md): Battery · discharged · Aug 2, 2025 · N404QS · Emb EMB505 · Emergency Lighting > EMERGENCY LIGHTS STARTED FLICKERING DURING CRUISE. SWITCHED LIGHT TO OFF POSITION FOR 1 MIN, BACK TO ARM, & LIGHTS STARTED FLICKERING AGAIN AFTER 30 SECS. ACCESSED FWD & AFT BATTERY. DURING ACCESS & BEFORE MAINT PERFORMED, FOUND THE EMER LIGHT CLL ON, RESET - [SDR DXTA2025080404430](https://openairdocs.org/sdr/DXTA2025080404430.md): Battery · failed · Jul 31, 2025 · N404QS · Emb EMB505 · Emergency Lighting > DURING FLIGHT, EMER LIGHTS FLICKERED A FEW TIMES & THEN STAYED ON CONTINUOUSLY FOR THE REST OF FLIGHT WITH THE SWITCH IN THE ARM POSITION. PERFORMED EMERGENCY LIGHTS BATTERY TOP CHARGE, PUT EMERGENCY LIGHTS SWITCH TO ON, LEFT ON FOR 30 MINS, PUT SWITCH IN AR - [SDR DXTA2024080900147](https://openairdocs.org/sdr/DXTA2024080900147.md): Controller · faulted · Aug 8, 2024 · N404QS · Emb EMB505 · Pressure Regulator/Outflow Valve > IN CRUISE, FL430, AN AIR NOISE HEARD, FEELING A PRESSURE BUMP, & NOTED CABIN ALTITUDE FLUCTUATING BETWEEN -600FPM AND +400FPM. LASTED APPROX 4 MINS & LEVELED OFF AT 0. AFTER 10 MINS FLUCTUATIONS AGAIN, NOT EXCEEDING -300FPM TO +150FPM. LASTED ABOUT 3 MINS - [SDR DXTA2023103199390](https://openairdocs.org/sdr/DXTA2023103199390.md): Battery · inoperative · Oct 30, 2023 · N404QS · Emb EMB505 · Emergency Lighting > CABIN EMERG LIGHT: EMER LIGHTS STAY ON IN ARMED POSITION. REMOVED AND REPLACED BAD FWD EMERGENCY BATTERY WITH CUSTOMER SUPPLIED NEW ONE OPS CHECK GOOD JAW EMB 300 33-52•01 OFF PN 74SDLS-00 SN 006677 ON PN 74SOLS·OO SN 007122. REMOVED AND REPLACED BAD AFT EMER - [SDR DXTA2022081668190](https://openairdocs.org/sdr/DXTA2022081668190.md): Flap System · warning message · Aug 16, 2022 · N404QS · Emb EMB505 · Trailing Edge Flap Control System > FLAP FAIL YELLOW CAS: DURING DESCENT THROUGH FL220 WE EXPERIENCED THE INDICATIONS OF AN FCE1 FAILURE. ALL MESSAGES DISPLAYED SIMULTANEOUSLY. SWPS FAULT (YELLOW) FLAP FAIL (YELLOW) PTRIM BKP FAIL (YELLOW) SPOILER FAULT (WHITE) NO CONFIGURATIONS CHANGES WERE - [SDR 2022F00132](https://openairdocs.org/sdr/2022F00132.md): None · none · Mar 13, 2022 · N404QS · Emb EMB505 · Ailerons > DURING ACCOMPLISHMENT OF EMBRAER SERVICE BULLETIN 505-55-0004 REV 01, ONE AILERON MASS BALANCE WEIGHT WAS FOUND TO BE BELOW MINIMUM WEIGHT. REPLACED WEIGHT WITH NEW, PART NUMBER PE915109-L31 PER SERVICE BULLETIN INSTRUCTIONS. THIS REPORT SUBMITTED TO COMPLY WI - [SDR DXTA2021060443150](https://openairdocs.org/sdr/DXTA2021060443150.md): Indicator · obstructed · Jun 3, 2021 · N404QS · Emb EMB505 · Door Warning System > MAIN DOOR: LOWER LOCK INDICATOR ON MED IS NOT READABLE. VISOR IS IN PLACE BUT FLAG CANNOT BE SEEN. REMOVED MAIN ENTRY DOOR STEPS AND MOVED INTERIOR DOOR TAPE OUT OF THE WAY WHICH WAS OBSTRUCTING THE DOOR FLAG INDICATION ON MED LOWER WINDOW. REINSTALLED MAIN E - [SDR 2021FA0000085](https://openairdocs.org/sdr/2021FA0000085.md): Battery Pack · failed · Mar 17, 2021 · N404QS · Emb EMB505 · Emergency Lighting > AIRCRAFT CREW REPORTED AN EMERGENCY LIGHT IN ARM POSITION WILL NOT GO OUT. PERFORMED TROUBLESHOOTING BASED ON THE AMM CHAPTER 33-52-01 AND FOUND NR 2 EMERGENCY BATTERY LIGHT (AFT)FAULTY. PERFORMED REPLACEMENT #2(AFT) EMERGENCY LIGHT BATTERY WITH A TESTED BA - [SDR DXTA2021031839620](https://openairdocs.org/sdr/DXTA2021031839620.md): Battery Pack · inoperative · Mar 16, 2021 · N404QS · Emb EMB505 · Emergency Lighting > EMERGENCY LIGHTING: EMER LIGHT IN ARM POSITION WILL NOT GO OUT. REMOVED AND REPLACED EMERGENCY BATTERY PACK IAW EMB AMM 33-50-11. - [SDR 2020FA0000396](https://openairdocs.org/sdr/2020FA0000396.md): Balance Weight · corroded · Sep 5, 2020 · N404QS · Emb EMB505 · Elevator Structure > DURING ACCOMPLISHMENT OF SERVICE BULLETIN 505-55-0004 REV 01 (DATED 06/24/2020) WE NOTED THE FOLLOWING: LEFT ELEVATOR ADJUSTABLE MASS BALANCE WEIGHTS BELOW TOLERANCE. PART NUMBER PE915109-L33 (13 EACH) AS FOLLOWS 5=82G,8=83G (MINIMUM 84G) AND HORN MASS WEIGHT - [SDR DXTA2020020603417](https://openairdocs.org/sdr/DXTA2020020603417.md): Garlock Seal · leaking · Feb 5, 2020 · N404QS · Emb EMB505 · Engine Oil Indicating System > RIGHT ENGINE - UPON DECENT A E2 OIL LO PRESS ILLUMINATED, WITH ASSOCIATED ENGINE PRESSURE INDICATION SHOWING 28 AND FALLING. THUS DIRECTING US TOWARD THE NAP 1-16 ENGINE SHUTDOWN PROCEDURE WHICH WE ACCOMPLISHED AND LANDED IN MSP. ///SIGN-OFF/// EVALUATED AN - [SDR DXTA2018081501306](https://openairdocs.org/sdr/DXTA2018081501306.md): Computer · malfunctioned · Aug 13, 2018 · N404QS · Emb EMB505 · Stabilizer Control System > WHILE FLYING AT FL410, RECEIVED A CAUTION WITH SWPS FAULT, FLAP FAIL, PTRIM BKP FAIL AND GND SPLR FAIL ANNUNCIATIONS. GROUND SPOILER ANNUNCIATION SWITCHED TO SPOILER FAULT. SSEC ALSO DISPLAYED ON THE BACKUP ATTITUDE INDICATOR. AIRCRAFT WOULD NOT DESCEND WITH ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' WHERE n_number = 'N404QS' AND registry_match = 'registration' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/aircraft/N404QS/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.