# Service difficulty reports: N721HS, cancelled Jul 25, 2025

A list on [N721HS, cancelled Jul 25, 2025](https://openairdocs.org/deregistered/N721HS-2025-07-25.md).

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first.

- [SDR SIMA20130822001](https://openairdocs.org/sdr/SIMA20130822001.md): Roller · lack of lube · Aug 22, 2013 · N721HS · Emb EMB135LR · Passenger/Crew Doors
  > F/A REPORTS MAIN CABIN DOOR DIFFICULT TO OPEN. LUBRICATED ROLLERS IAW AMM 53-21-02. OPS CHECKED IS GOOD.
- [SDR SIMA20130702010](https://openairdocs.org/sdr/SIMA20130702010.md): Bulb · loose · Jul 2, 2013 · N721HS · Emb EMB135LR · Emergency Equipment
  > THE CREW REPORTED THE CAPTAIN’S FLASHLIGHT WAS INOPERATIVE. ACFT REMOVED FROM SERVICE. SECURED BULB AT CAPTAIN’S FLASHLIGHT IAW CMM 25-60-11. OPS TESTED GOOD, NO FURTHER DEFECT NOTED. ACFT RETURNED TO SERVICE.
- [SDR SIMA20130423009](https://openairdocs.org/sdr/SIMA20130423009.md): Controller · inoperative · Apr 23, 2013 · N721HS · Emb EMB135LR · Cabin Pressure Controller
  > ON FLIGHT 4526 THE CREW REPORTED THAT ON CLIMBOUT THE AUTO PRESSURIZATION CONTROLLER FAILED. MANUAL CONTROLLED CABIN NORMALLY. THE CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. ITEM DEFERRED PER MEL 21-16 AUTH# 041068DM-C. M PROCEDURES COMPLIED WI
- [SDR SIMA20130415007](https://openairdocs.org/sdr/SIMA20130415007.md): Hydraulic System · low · Apr 15, 2013 · N721HS · Emb EMB135LR · Hydraulic System, Main
  > ON FLIGHT 4484 THE CREW REPORTED A HYDRAULIC 1 LOW MESSAGE. THE CREW DECLARED AN EMERGENCY AND LANDED AT DESTINATION WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. SERVICED HYD 1 SYSTEM IAW 12-13-01. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT
- [SDR SIMA20130304003](https://openairdocs.org/sdr/SIMA20130304003.md): Light · inoperative · Mar 4, 2013 · N721HS · Emb EMB135LR · Emergency Lighting
  > DURING B INSPECTION FOUND THE CEILING EMERGENCY LIGHT ROW 12 INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE AFT CEILING EMERGENGY LIGHT ABOVE ROW 12 IAW EMB-135 AMM 33-50-08. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RET
- [SDR SIMA20130118002](https://openairdocs.org/sdr/SIMA20130118002.md): Light · inoperative · Jan 18, 2013 · N721HS · Emb EMB135LR · Emergency Lighting
  > DURING MAINTENANCE INSPECTION FOUND THE COCKPIT EMERGENCY LIGHT INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE COCKPIT EMERGENCY LIGHT LAMP IAW EMB AMM 33-50-05 AND IAW 33-50-00. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS
- [SDR SIMA20121003005](https://openairdocs.org/sdr/SIMA20121003005.md): Flashlight · unserviceable · Oct 3, 2012 · N721HS · Emb EMB135LR · Emergency Equipment
  > ON FLIGHT 2772 THE CREW REPORTED THE FIRST OFFICER NEEDED A NEW FLASHLIGHT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE FIRST OFFICER’S FLASHLIGHT IAW EMB 135 33-51-01 AMM. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SE
- [SDR SIMA20120316003](https://openairdocs.org/sdr/SIMA20120316003.md): Holder · broken · Mar 16, 2012 · N721HS · Emb EMB135LR · Emergency Equipment
  > DURING MAINTENANCE INSPECTION FOUND THE CAPTAINS EMERGENCY FLASHLIGHT HOLDER BROKEN. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE CAPTAIN'S EMERGENCY FLASHLIGHT ASSEMBLY IAW EMB AMM 33-50-16. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT
- [SDR SIMA2012059003](https://openairdocs.org/sdr/SIMA2012059003.md): Light · damaged · Feb 27, 2012 · N721HS · Emb EMB135LR · Emergency Lighting
  > DURING MAINTENANCE INSPECTION FOUND EMERGENCY LIGHT STRIP MISSING POWER TERMINAL AT 11A. THE AIRCRAFT WAS REMOVED FROM SERVICE. REPLACED EMERGENCY LIGHT STRIP POWER TERMINAL AT 11A IAW EMB 135 AMM 33-50-08. THE AIRCRAFT WAS RETURNED TO SERVICE.
- [SDR SIMA2011346008](https://openairdocs.org/sdr/SIMA2011346008.md): Light · inoperative · Dec 10, 2011 · N721HS · Emb EMB135LR · Emergency Lighting
  > DURING MAINTENANCE BASE VISIT FOUND THE EMERGENCY LIGHT STRIP AT ZONE 261 INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE FLOOR PROXIMITY LIGHT AT ZONE 261, IAW EMB135 AMM 33-50-12. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WA
- [SDR SIMA2011297007](https://openairdocs.org/sdr/SIMA2011297007.md): Light · inoperative · Oct 21, 2011 · N721HS · Emb EMB135LR · Emergency Lighting
  > DURING MAINTENANCE INSPECTION FOUND THE SERVICE DOOR EMERGENCY LIGHT INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE SERVICE DOOR EMERGENCY LIGHT LAMP IAW EMB135 AMM 33-50-10. THE AIRCRAFT WAS RETURNED TO SERVICE.
- [SDR SIMA201128401](https://openairdocs.org/sdr/SIMA201128401.md): Light · inoperative · Oct 10, 2011 · N721HS · Emb EMB135LR · Emergency Lighting
  > DURING MAINTENANCE BASE VISIT THE AFT EMERGENCY CELING LIGHT WAS FOUND TO BE INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE AFT EMERGENCY CELING LIGHT IAW EMB135 AMM 33-50-08. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RE
- [SDR SIMA201125802](https://openairdocs.org/sdr/SIMA201125802.md): Sill · corroded · Sep 13, 2011 · N721HS · Emb EMB135LR · Fuselage Miscellaneous Structure
  > DURING MAINTENANCE BASE VISIT INSPECTION FOUND THE CARGO DOOR SILL CORRODED. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED CARGO DOOR SILL IAW EMBRAER STRUCTURAL REPAIRE MANUAL 51-40-02. THE AIRCAFT WAS RETURNED TO SERVICE.
- [SDR SIMA201011602](https://openairdocs.org/sdr/SIMA201011602.md): Radar · inoperative · Apr 25, 2010 · N721HS · Emb EMB135LR · Weather Radar System
  > ON FLIGHT 4475 DURING CRUISE THE CREW REPORTED THE WEATHER RADAR STOPPED WORKING GOING INTO JFK. THE CREW ELECTED TO RETURN TO RDU DUE TO WEATHER. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE RADAR W
- [SDR SIMA200925402SUP](https://openairdocs.org/sdr/SIMA200925402SUP.md): Frame · misinstalled · Oct 21, 2009 · N721HS · Emb EMB135LR · Fuselage Main, Frame
  > DURING MAINTENANCE INSPECTION, DISCOVERED IMPROPERLY BUCKED RIVETS FOUND ON FRAME 2 ON THE RIGHT SIDE OF THE FUSELAGE. SKIN REQUIRES REPLACEMENT FROM FRAME 1A TO 3 FOR FRAME 2 REPAIR. AIRCRAFT REMOVED FROM SERVICE. REPLACED SKIN AND FRAME 2 IN ACCORDANCE WI
- [SDR SIMA200925402](https://openairdocs.org/sdr/SIMA200925402.md): Skin · damaged · Sep 6, 2009 · N721HS · Emb EMB135LR · Fuselage Main, Plate/Skin
  > DURING MAINTENANCE INSPECTION THE RIGHT FUSELAGE SKIN WAS REPLACED FROM FRAME 1A TO 3. THE REPAIR WAS DUE TO FRAME NR 2 REPAIR OF IMPROPERLY BUCKED RIVETS. THE AIRCRAFT WAS REMOVED FROM SERVICE. REPLACED SKIN AND FRAME NR 2 IAW EMB SRM 51-40-02. AIRCRAFT R
- [SDR SIMA200925207](https://openairdocs.org/sdr/SIMA200925207.md): Skin · damaged · Sep 6, 2009 · N721HS · Emb EMB135LR · Fuselage Main, Plate/Skin
  > DURING MAINTENANCE CHECK THE RIGHT FUSELAGE SKIN WAS DAMAGED DURING REPAIR. IT WAS DAMAGED AT FRAME 2. AIRCRAFT WAS REMOVED FROM SERVICE. REPLACED SKIN AND FRAME NUMBER 2 IAW EMBRAER SRM 51-40-02. AIRCRAFT WAS RETURNED TO SERVICE.
- [SDR SIMA200925206](https://openairdocs.org/sdr/SIMA200925206.md): Floor Support · corroded · Sep 6, 2009 · N721HS · Emb EMB135LR · Fuselage Miscellaneous Structure
  > DURING MAINTENANCE CHECK THE CENTER OMEGA BEAM WAS FOUND TO BE CORRODED AT FRAME 33. REMOVED FROM SERVICE. REPLACED THE OMEGA BEAM IAW EMB SRM 51-40-02. AIRCRAFT RETURNED TO SERVICE.
- [SDR SIMA200925205](https://openairdocs.org/sdr/SIMA200925205.md): Floor Support · corroded · Sep 6, 2009 · N721HS · Emb EMB135LR · Fuselage Miscellaneous Structure
  > DURING MAINTENANCE CHECK THE LEFT OMEGA BEAM AT FRAME 33 WAS FOUND TO BE CORRODED. AIRCRAFT REMOVED FROM SERVICE. REPAIRED THE LEFT OMEGA BEAM AT FRAME 33 IAW SRM 53-00-10. AIRCRAFT RETURNED TO SERVICE.
- [SDR SIMA200910701](https://openairdocs.org/sdr/SIMA200910701.md): Smoke Detector · false activation · Apr 14, 2009 · N721HS · Emb EMB135LR · Smoke Detection
  > ON FLIGHT 4840, DURING CRUISE CREW RECEIVED A BAG SMOKE ON EICAS AND RED ANNUNCIATION BAG EXT ON OVERHEAD FA DIDN`T NOTICE ANY SMOKE OR FLAMES CREW DECLARE EMERGENCY AND DIVERT TO CMH AND LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND RE
- [SDR SIMA200909901](https://openairdocs.org/sdr/SIMA200909901.md): Smoke Detector · false indication · Mar 31, 2009 · N721HS · Emb EMB135LR · Smoke Detection
  > ON FLIGHT 4920, DURING DESCENT CREW RECEIVED BAGGAGE FIRE WARN MESSAGE. CREW FOLLOWED AOM AND BLEW BOTTLES AND F/O INSPECTED AND FOUND NO FIRE. EMERGENCY DECLARED AND LANDED SAFELY IN YUL. INSPECTED CARGO AND NO EVIDENCE OF FIRE NOTED. ISSUED MEL 26-03 AND
- [SDR SIMA200824605](https://openairdocs.org/sdr/SIMA200824605.md): Engine · malfunctioned · Aug 31, 2008 · N721HS · Emb EMB135LR · Engine (Turbine/Turboprop)
  > ON FLIGHT 4782 CREW REPORTED DURING TAXIING THAT THEY NOTED A STRONG ODOR OF BURN-ENGINE OIL IN COCKPIT AND CABIN. ACFT REMOVED FROM SERVICE. ACFT PULLS TO THE LT WHILE TAXIING WITH BOTH ENGINES RUNNING. R&R LT ENGINE. IAW EMB WORK CARD NR 71-000-00. OPS C
- [SDR SIMA200812901](https://openairdocs.org/sdr/SIMA200812901.md): Ballast · malfunctioned · May 6, 2008 · N721HS · Emb EMB135LR · Passenger Compartment Lighting
  > ON FLIGHT 4742, CREW REPORTED ELECTRICAL SMELL IN GALLEY AREA DURING BOARDING. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED BOTH BALLASTS ON GALLEY LIGHT IAW EMB-135 AMM 33-21-05. OPERATIONAL CHECK OK AIRCRAFT RETURN TO SERVICE.
- [SDR SIMA200806302](https://openairdocs.org/sdr/SIMA200806302.md): Electronic Unit · malfunctioned · Feb 29, 2008 · N721HS · Emb EMB135LR · Landing Gear Retraction/Extension System
  > ON FLIGHT 4569, CREW REPORTED DURING TAKEOFF GEAR HANDLE WENT UP BUT THE GEAR DIDN'T. MSG WAS LANDING GEAR LEVER DISAGREE. RETURN TO FIELD. DESCENT RATE AT 100 FT P MIN. LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. PERFORMED FIM TASK 32-32-00-
- [SDR SIMA200719005](https://openairdocs.org/sdr/SIMA200719005.md): Position Sensor · failed · Jul 8, 2007 · N721HS · Emb EMB135LR · Trailing Flap Position Indicating System
  > "SUP" FLAPS SELECTED TO THE UP POSITION FOLLOWED BY FLAP FAIL AND SPS ADVANCE MESSAGE, FLAPS STUCK AT 9 DEGREES, RETURNED TO DFW. REMOVED AND REPLACED LEFT FLAP SPEED SENSOR AND FLAP BRAKE IAW EMB AMM. OPERATIONAL CHECK GOOD. RETURNED AIRCRAFT TO SERVICE.
- [SDR SIMA200719004](https://openairdocs.org/sdr/SIMA200719004.md): Flap System · stuck · Jul 8, 2007 · N721HS · Emb EMB135LR · Trailing Edge Flap Control System
  > FLAPS SELECTED TO THE UP POSITION FOLLOWED BY FLAP FAIL AND SPS ADVANCE MESSAGE, FLAPS STUCK AT 9 DEGREES.
- [SDR SIMA200720508](https://openairdocs.org/sdr/SIMA200720508.md): Shear Tie · chafed · Jul 2, 2007 · N721HS · Emb EMB135LR · Fuselage Internal Mounting Structure
  > FOUND SHEAR CLIP AT FRAME 15 CHAFED. REMOVED 26 INCH SECTION, FABRICATED AND INSTALLED NEW SHEAR CLIP IAW EMB IC2007-145/04376, DATED JUNE 28, 2007. AIRCRAFT RETURNED TO SERVICE.
- [SDR SIMA200600904](https://openairdocs.org/sdr/SIMA200600904.md): Floor Support · corroded · Jan 4, 2006 · N721HS · Emb EMB135LR · Fuselage Miscellaneous Structure
  > THE LT OMEGA BEAM WAS FOUND CORRODED AT FRAME 25. BLENDED THE CORRODED AREA TO REMOVE THE DAMAGE. FABRICATED A REPAIR DOUBLER. REPAIR DONE IAW SRM. (K)
- [SDR SIMA200600503](https://openairdocs.org/sdr/SIMA200600503.md): Floor Support · corroded · Jan 4, 2006 · N721HS · Emb EMB135LR · Fuselage Miscellaneous Structure
  > A PREVIOUS REPAIR ON THE LT OMEGA BEAM WAS FOUND TO BE CORRODED AT FRAME 20. REMOVED THE CORRODED REPAIR. PREPARED A DOUBLER, FILLER, PLATE AND 2 SHIMS. REPAIR DONE IAW SRM. (K)
- [SDR SIMA200600506](https://openairdocs.org/sdr/SIMA200600506.md): Sill · corroded · Jan 2, 2006 · N721HS · Emb EMB135LR · Fuselage Miscellaneous Structure
  > THE SERVICE DOOR CENTER SILL WAS FOUND TO BE CORRODED. REMOVED THE CORRODED CENTER SILL. INSTALLED SERVICEABLE CENTER SILL IAW SRM. (K)
- [SDR SIMA200600507](https://openairdocs.org/sdr/SIMA200600507.md): Floorbeam · corroded · Jan 2, 2006 · N721HS · Emb EMB135LR · Fuselage Main, Floor Beam
  > THE GALLEY FORWARD DIGITAL WAS FOUND TO BE CORRODED. REMOVED THE CORROSION BY MAKING CUT OUT. FABRICATED A DOUBLER. REPAIR DONE IAW SRM. (K)
- [SDR SIMA200600505](https://openairdocs.org/sdr/SIMA200600505.md): Beam · corroded · Jan 2, 2006 · N721HS · Emb EMB135LR · Fuselage Miscellaneous Structure
  > THE CENTER BEAM WAS FOUND TO BE CORRODED AT FRAME 20. REMOVED THE CORROSION BY MAKING A CUT OUT. FABRICATED A DOUBLER. REPAIR DONE IAW SRM.
- [SDR SIMA200207905](https://openairdocs.org/sdr/SIMA200207905.md): Cap · corroded · Mar 19, 2002 · N721HS · Emb EMB135LR · Nose/Tail Landing Gear Strut/Axle
  > ABI - THIS IS A LEVEL 2 FINDING. LEFT NOSE LANDING GEAR STRUT LOWER BEARING CAP CORRODED. REPLACED STRUT LOWER BEARING CAP IAW EMB 135 AMM 32-20-01. (M)
- [SDR SIMA200207904](https://openairdocs.org/sdr/SIMA200207904.md): Cap · corroded · Mar 19, 2002 · N721HS · Emb EMB135LR · Main Landing Gear
  > ABI - THIS IS A LEVEL 2 FINDING. LEFT MAIN LANDING GEAR FORWARD BEARING CAP CORRODED. REMOVED AND REPLACED LEFT FORWARD BEARING CAP IAW EMB 135 AMM 32-10-01. (M)
- [SDR SIMA200208303](https://openairdocs.org/sdr/SIMA200208303.md): Sill · corroded · Mar 18, 2002 · N721HS · Emb EMB135LR · Fuselage Miscellaneous Structure
  > ABI - THIS IS A LEVEL 2 FINDING. CORROSION ON SERVICE DOOR CENTER SILL. RESTORED PROTECTIVE COATING, DAMAGE ACCEPTED AS IS IAW EMB GST 0636/02. (M)
- [SDR SIMA200208707](https://openairdocs.org/sdr/SIMA200208707.md): Gusset · corroded · Mar 18, 2002 · N721HS · Emb EMB135LR · Fuselage Miscellaneous Structure
  > ABI - THIS IS A LEVEL 2 FINDING. FORWARD DIAMOND GUSSET IS CORRODED AT FRAME 20. REPLACED SERVICEABLE FORWARD DIAMOND GUSSET IAW EMB 135 SRM 51-40-06, 51-40-02. (M)
- [SDR SIMA200208708](https://openairdocs.org/sdr/SIMA200208708.md): Sill · corroded · Mar 18, 2002 · N721HS · Emb EMB135LR · Fuselage Miscellaneous Structure
  > ABI - THIS IS A LEVEL 2 FINDING. SERVICE DOOR SILL CORRODED AROUND NUTPLATE AT FRAME 20. BLENDED AND TREATED CORROSION, ACCEPTED AS IS IAW GST-0925/02. (M)
- [SDR SIMA200208709](https://openairdocs.org/sdr/SIMA200208709.md): Sill · corroded · Mar 18, 2002 · N721HS · Emb EMB135LR · Fuselage Miscellaneous Structure
  > ABI - THIS IS A LEVEL 2 FINDING. RIGHT FORWARD SILL IS CORRODED AROUND THE NUTPLATES AT FRAME 18 AND 20. BLENDED AND TREATED FOR CORROSION IAW GST-0925/02. (M)
- [SDR SIMA200208710](https://openairdocs.org/sdr/SIMA200208710.md): Gusset · corroded · Mar 18, 2002 · N721HS · Emb EMB135LR · Fuselage Miscellaneous Structure
  > ABI - THIS IS A LEVEL 2 FINDING. CENTER BEAM GUSSET IS CORRODED AT FRAMES SO AND 22. BLENDED AND TREATED FOR CORROSION, ACCEPTED AS IS IAW GST-0725/02. (M)
- [SDR SIMA200129001](https://openairdocs.org/sdr/SIMA200129001.md): Windshield · cracked · Oct 14, 2001 · N721HS · Emb EMB135LR · Flight Compartment Windows
  > ORD 0 FLT 4019 - FIRST OFFICERS WINDSHIELD CRACKED IN FLIGHT. AIRCRAFT RETURNED TO FIELD. REMOVED AND REPLACED FIRST OFFICERS WINDSHIELD IAW EMB 135 AMM. OPERATIONALLY CHECKED GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)
- [SDR SIMA200036204](https://openairdocs.org/sdr/SIMA200036204.md): Control Unit · malfunctioned · Dec 27, 2000 · N721HS · Emb EMB135LR · Stabilizer Control System
  > ORD - FLT 4230 - DURING CLIMB, CREW WAS NOT ABLE TO BRING NOSE DOWN WITH CAPTAIN, F/O OR STANDBY PITCH TRIM BEFORE GETTING PITCH TRIM FAIL ON EICAS. CREW DECLARED EMERGENCY AND RETURNED TO ORD AND LANDED SUCCESSFULLY. MAINTENANCE REMOVED AND REPLACED HORIZON

## 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 = 'N721HS' AND deregistration_id = 'N721HS-2025-07-25'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/deregistered/N721HS-2025-07-25/reports

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