# Service difficulty reports: N846EX, cancelled May 12, 2010

A list on [N846EX, cancelled May 12, 2010](https://openairdocs.org/deregistered/N846EX-2010-05-12.md).

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

- [SDR HNAA2009091600289](https://openairdocs.org/sdr/HNAA2009091600289.md): Pcu · out of adjust · Sep 15, 2009 · N846EX · Dhav DHC8102 · Propeller Controlling System
  > ON TAKE OFF ROLL NR 2 PROP AT 1215 RPM AT 86 PERCENT TORQUE. ADJUSTED NR 2 PCU SPEEDER SCREW IAW MANUAL 61-22-00. GROUND RAN IAW MAINTENANCE RUN UP MANUAL. OPS CHECK GOOD.
- [SDR HNAA2009060100164](https://openairdocs.org/sdr/HNAA2009060100164.md): Acm · malfunctioned · May 29, 2009 · N846EX · Dhav DHC8102 · Cabin Cooling System
  > UPON TAXI AT LGA, A BURNING SMELL IN THE FLIGHT DECK. A FERRY FLIGHT WAS ISSUED FOR THE PLANE TO RELOCATE TO ROA. IN ROA AN AIR CYCLE MACHINE (ACM) WAS REMOVED AND REPLACED, WITH NO FURTHER BURNING SMELLS IN THE FLIGHT DECK.
- [SDR HNAA2009042900138](https://openairdocs.org/sdr/HNAA2009042900138.md): Terminal · loose · Apr 28, 2009 · N846EX · Dhav DHC8102 · Ice/Rain Protection System Wiring
  > CAPTAINS SIDE WINDOW HEAT PRODUCES ELECTRICAL SMELL. FOUND WIRE TERMINAL END LOOSE (L2) ON CAPTAIN SIDE WINDOW TERMINAL BLOCK. REPLACED TERMINAL END AND TIGHTENED OPS CHECK WINDOW HEAT SYSTEM IN REFERENCE TO MAINTENANCE MANUAL 30-41-02. OPS CHECK GOOD.
- [SDR HNAA2008120700340](https://openairdocs.org/sdr/HNAA2008120700340.md): Regulator · failed · Dec 7, 2008 · N846EX · Dhav DHC8102 · Hydraulic Pressure Regulator, Main
  > JUST AFTER TAKEOFF, THE 'RUDDER FULL PRESSURE', 'RUDDER PRESSURE', AND 'NR 2 RUDDER HYDRAULIC' CAUTION LIGHTS CAME ON. HYDRAULIC QUANTITIES WERE NORMAL. THE AIRCRAFT WAS RETURNED TO THE FIELD. MAINTENANCE REPLACED THE DUAL PRESSURE REGULATOR. LEAK AND OPS
- [SDR HNAA2008120200329](https://openairdocs.org/sdr/HNAA2008120200329.md): Battery Pack · discharged · Nov 23, 2008 · N846EX · Dhav DHC8102 · Emergency Lighting
  > UPON ARRIVAL TO A/C, F/A FOUND EMERGENCY LIGHT TO HAVE BEEN LEFT ON. EMERGENCY LIGHTS DO NOT ILLUMINATE. REMOVED AND REPLACED CABIN EMERGENCY LIGHT BATTERIES, CABIN NUMBER S 3, 4, 5 AND 6 IAW 33-50-05R, OPS CHECK GOOD IAW 33-50-03Q BATTERY S/N SBY-75, SBY-1
- [SDR HNA2008F00020](https://openairdocs.org/sdr/HNA2008F00020.md): Light · malfunctioned · Jul 2, 2008 · N846EX · Dhav DHC8102 · Emergency Lighting
  > 3 OCCURRENCES IN A ROW OF EMERGENCY LIGHTS GOING ON IN FLIGHT. NR 1 FLT 4577 CLT, NR 2 4276 GSP, NR 3 4196 MDT. CREW REPORTED: NR 1 REMOVED AND REPLACED EMERGENCY LIGHTS CONTROL BOX AC RELEASED FOR SERVICE. FAILED AGAIN, SAME PROBLEM NR 2 FLIGHT, F/A PANEL E
- [SDR HNAA0800153](https://openairdocs.org/sdr/HNAA0800153.md): Adi · false indication · May 9, 2008 · N846EX · Dhav DHC8102 · Attitude and Direction Data System
  > CAPT'S ADI DURING CLIMB TWITCHED OFF AND ON WITH ROLL MISMATCH AND ATT FLAG. AFTER LEVELING OFF, ADI INDICATED 15 DEG LEFT AND 2 DEG NOSE DOWN.
- [SDR HNA2008F00008](https://openairdocs.org/sdr/HNA2008F00008.md): Floorbeam · cracked · Mar 16, 2008 · N846EX · Dhav DHC8102 · Fuselage Main, Floor Beam
  > FOUND FLOORBEAM CRACKED AT FUSE STA 253 APPROX, IN FRONT OF RT EMERGENCY EXIT DOOR. REPLACED WITH NEW PART NR 85320471111 AND INSTALLED WITH SOLID RIVETS IAW SRM 51-40-00. (K)
- [SDR HNA2008F00006](https://openairdocs.org/sdr/HNA2008F00006.md): Bracket · cracked · Mar 9, 2008 · N846EX · Dhav DHC8102 · Wing, Center Box
  > IN WING BOX, UNDER ACCESS PANEL 261 FT BRACKET ANGLE BETWEEN LT STRINGER 2 AND WING BOX FRAME AT FS 369.511 FOUND CRACKED. REPLACED WITH NEW PN 85350270-101 IAW SRM 51-40-00 CRACK MINOR IN NATURE, NON STRUCTURAL IN TYPE. (K)
- [SDR HNA2008F00007](https://openairdocs.org/sdr/HNA2008F00007.md): Seat Track · corroded · Mar 4, 2008 · N846EX · Dhav DHC8102 · Fuselage, Seat/Cargo Attach Fittings
  > SEAT TRACK CORRODED IN AREA OF LAV AND GALLEY, SEAT TRACK REPAIRED IAW EA08-53-08-3097. (K)
- [SDR HNAA0800023](https://openairdocs.org/sdr/HNAA0800023.md): Lamp · burned out · Jan 4, 2008 · N846EX · Dhav DHC8102 · Emergency Lighting
  > 2 FLOOR EMERGENCY ESCAPE PATH LIGHTS ARE INOP IN FORWARD CABIN. RELAMPED AND TESTED GOOD.
- [SDR HNAA0700099](https://openairdocs.org/sdr/HNAA0700099.md): Indicator · malfunctioned · Jun 1, 2007 · N846EX · Dhav DHC8102 · Hydraulic Quantity Indicator
  > DURING NR 2 HYD SYS SERVICE BOTH INDICATORS MOVED TO.5 QT AND STOPPED WHILE SYS CONTINUED TO ACCEPT APPROX 3.5 QTS OF FLUID UNTIL SPILLED INTO OVER SPILL CANISTER. FERRY TO MDT. DURING TAXI OUT CREW REPORTED QTY GAUGE CORRECTED AFTER OPS OF FLT CONTROL SYS
- [SDR HNAA0700083](https://openairdocs.org/sdr/HNAA0700083.md): Socket · burned · May 7, 2007 · N846EX · Dhav DHC8102 · Passenger Compartment Lighting
  > ELECTRICAL ODOR NOTICED AT ROW 3 RIGHT HAND SIDE. PERFORMED HIDDEN DAMAGE INSPECTION, REPLACED LIGHT SOCKET AT 3 AC, OPS CHECK GOOD.
- [SDR HNAA0700035](https://openairdocs.org/sdr/HNAA0700035.md): Garlock Seal · leaking · Feb 9, 2007 · N846EX · Dhav DHC8102 · Turbine Engine Oil System
  > NR 2 ENGINE OIL PRESSURE FLUCTUATED FROM 40 TO 60 PSI IN FLIGHT. ENGINE WAS SERVICED WITH 6 QUARTS OF OIL TO BRING TO BOTTOM OF SIGHT GAUGE. FOUND STARTER GENERATOR GARLOCK SEAL LEAKING. REPLACED ENGINE.
- [SDR HNAA0600060](https://openairdocs.org/sdr/HNAA0600060.md): Sensor · out of adjust · Jun 29, 2006 · N846EX · Dhav DHC8102 · Landing Gear Position and Warning
  > ON GEAR RETRACTION NOSE UNSAFE LIGHT AND SELECT HANDLE LIGHT ILLUMINATED MOMENTARILY 2 TIMES FOLLOWED BY THUMPING NOISE IN GEAR WELL. INSPECTED AND FOUND UPLOCK SENSOR GAP AT.050, ADJUSTED GAP TO.045 IAW WORKCARD 32-20-11R. PERFORMED TARGET NEAR FAR TEST A
- [SDR HNAA0500092](https://openairdocs.org/sdr/HNAA0500092.md): Inverter · warning light · Oct 11, 2005 · N846EX · Dhav DHC8102 · Electrical Power System
  > CLIMBING THROUGH 4000 FEET ON CLIMB-OUT L26AC, R26AC, PRIMARY, SECONDARY AND AUX INVERTER CAUTION LIGHTS WITH TERRAIN INOP AND GPWS CAUTION LIGHTS ILLUMINATED. DURING CHECKLIST UPON SWITCHING AUX INVERTER TO RIGHT AFTER 45 SECONDS ALL LIGHTS EXTINGUISHED. R
- [SDR HNAA0500012](https://openairdocs.org/sdr/HNAA0500012.md): Elec Connector · contaminated · Feb 17, 2005 · N846EX · Dhav DHC8102 · Turbine Engine System Wiring
  > MASTER WARNING LIGHT FLICKERED ON/OFF IN FLT FOLLOWED BY NR 2 ENG OIL PRESSURE WARNING LIGHT ILLUMINATED F/O STATED THAT HE DID SEE PRE FLUX NR 2 ENG OIL PRESS BUT IT DID NOT GO BELOW 45 PSI. CLEANED NR 2 ENGINE LOW OIL PRESSURE CONNECTOR SERVICED OIL LEVEL T
- [SDR HNAA0400126](https://openairdocs.org/sdr/HNAA0400126.md): Ecu · faulty · Oct 19, 2004 · N846EX · Dhav DHC8102 · Fuel Controlling System
  > FLIGHT NR 3937 OUT OF SWF REPORTED, THE NR 1 ENGINE CONTROL UNIT FAILING AND THE TORQUE DROPPING TO 49 PERCENT AS THEY WERE CLIMBING THROUGH 5000 FT. CREW BEGAN THE ABNORMAL CHECKLIST AS THE TORQUE CONTINUED TO DROP TO ZERO. THE NR 1 ENGINE WAS SHUTDOWN, AN
- [SDR HNAA0400125](https://openairdocs.org/sdr/HNAA0400125.md): Warning Light · illuminated · Oct 11, 2004 · N846EX · Dhav DHC8102 · Turbine Engine Accessory Drive
  > FLIGHT NR 3842 REPORTED THE NR 2 ENGINE OIL PRESSURE WARNING LIGHT ILLUMINATING ON TAKEOFF CLIMB. THE NR 2 OIL OIL PRESSURE ALSO FLUCTUATED WITHIN THE SAFE ZONE AND STABILIZED WHEN POWER WAS REDUCED. FLIGHT RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAI
- [SDR HNAA0400122](https://openairdocs.org/sdr/HNAA0400122.md): Inverter · faulty · Sep 22, 2004 · N846EX · Dhav DHC8102 · AC Inverter
  > FLIGHT 3893 REPORTED AUXILLARY INVERTER CAUTION LIGHT ILLUMINATED ALONG WITH A STRONG FISH ODOR AND CIRCUIT BREAKER D-8 POPPING. MAINTENANCE REPLACED THE AUXILLARY INVERTER AND ALL OPERATIONAL CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE.
- [SDR PCAA0406225](https://openairdocs.org/sdr/PCAA0406225.md): Proximity Sensor · maladjustment · Jun 20, 2004 · N846EX · Dhav DHC8102 · Landing Gear Position and Warning
  > FLIGHT 3720 HAD TO RETURN TO FIELD DUE TO HAVING THE RIGHT AND LEFT MAIN GEAR UNSAFE LIGHTS ILLUMINATE AFTER THE GEAR WAS RETRACTED. THE CREW USED THE ALTERNATE EXTENSION AND LANDED WITHOUT INCIDENT. MAINTENANCE WAS ABLE TO DUPLICATE THE CONDITION. IT WAS F
- [SDR PCAA0406220](https://openairdocs.org/sdr/PCAA0406220.md): Wire · chafed · Jun 9, 2004 · N846EX · Dhav DHC8102 · Landing Gear System Wiring
  > FLIGHT 4096 REPORTED THE RIGHT MAIN GEAR DOOR LIGHT ILLUMINATING DURING TAXI. MAINTENANCE IN PITTSBURGH WAS UNABLE TO REPAIR, AND A FERRY PERMIT ISSUED TO MIDDLETOWN. MAINTENANCE FOUND A CHAFED WIRE BETWEEN PROXIMITY SENSOR CONTROL UNIT CANNON PLUG PIN 36 AN
- [SDR PCAA0403183](https://openairdocs.org/sdr/PCAA0403183.md): Seal · loose · Mar 18, 2004 · N846EX · Dhav DHC8102 · Vertical Stabilizer, Plate/Skin
  > REPORTED A VIBRATION IN CRUISE FLT. THE CREW ELECTED TO MAKE A PRECAUTIONARY LANDING AT WILLIAMSPORT DUE TO BEING OVERHEAD THE AIRPORT AT THE TIME. MAINTENANCE FOUND THE SEAL ON THE LEFT HAND SIDE OF THE VERTICAL STABILIZER TO HORIZONTAL STABILZER LOOSE. THE S
- [SDR PCAA0310125](https://openairdocs.org/sdr/PCAA0310125.md): Connector · dirty · Oct 18, 2003 · N846EX · Dhav DHC8102 · Fuel Controlling System
  > WHILE ON TAKEOFF ROLL IN DCA, FLIGHT NR 3516 HAD NR 2 ENGINE CONTROL MANUAL LIGHT COME ON, PROPS DROPPING TO 650 RPM. CONNECTOR ON ELECTRONIC ENGINE CONTROL AND TORQUE SIGNAL CONDITION UNIT WERE CLEANED AND AIRCRAFT WAS GROUND RUN AND OPERATIONAL CHECKS WERE G
- [SDR PCAA0310121](https://openairdocs.org/sdr/PCAA0310121.md): Valve · sticking · Oct 10, 2003 · N846EX · Dhav DHC8102 · Compressor Bleed Valve
  > CREW REPORTED THAT WHILE IN CRUISE FLIGHT THE NR 2 ENGINE HAD CAUSED A VIBRATION AND THE OIL PRESSURE DROPPED TO 40 PSI. THE NR 2 ENGINE WAS SHUT DOWN, AND AN EMERGENCY WAS DECLARED. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPAIRED A STICKING P
- [SDR PCAA0308103](https://openairdocs.org/sdr/PCAA0308103.md): Handle · inoperative · Aug 29, 2003 · N846EX · Dhav DHC8102 · Landing Gear Selector
  > CREW REPORTED THAT DURING APPROACH, WHEN SELECTING GEAR HANDLE DOWN GEAR DID NOT EXTEND. MANUAL EXTENSION WAS PERFORMED AND EMERGENCY WAS DECLARED. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE GEAR HANDLE AND USED A HYDRAULIC MULE FOR
- [SDR PCAA0308090](https://openairdocs.org/sdr/PCAA0308090.md): Generator · lightning strike · Aug 3, 2003 · N846EX · Dhav DHC8102 · DC Generator-Alternator
  > 20 MINUTES PRIOR TO LANDING AT BDL A/C EXPERIENCED A LIGHTNING STRIKE. BOTH DC GEN WENT OFF LINE. ONE GEN WAS ABLE TO RESET. FLT CONTINUED TO BDL & LANDED WITHOUT FURTHER INCIDENCE. MAINT PERFORMED A LIGHTNING STRIKE INSPECTION IAW DEHAV DASH 8 MM, PWA MM, & H
- [SDR PCAA0307085](https://openairdocs.org/sdr/PCAA0307085.md): Light · inoperative · Jul 24, 2003 · N846EX · Dhav DHC8102 · Emergency Lighting
  > DURING A ROUTINE MAINTENANCE VISIT 2 AFT FLOOR EMERGENCY LIGHTS WERE FOUND TO BE INOPERATIVE. LIGHT ASSEMBLY PART NUMBER 10-1307-9 WAS REPLACED. AIRCRAFT RETURNED TO SERVICE.
- [SDR PCAA0301027](https://openairdocs.org/sdr/PCAA0301027.md): Switch · stuck · Jan 30, 2003 · N846EX · Dhav DHC8102 · Propeller Feathering/Reversing
  > PIT-FLIGHT#3989. CREW REPORTED #1 GROUND RANGE LIGHT CYCLES WITH POWER LEVER IN DISC. MAINTENANCE REPLACED POWER LEVER SWITCH 6141 S3 AND SWITCH 6121 S11 FOUND TO BE OUT OF ADJUSTMENT. REMOVED AND REPLACED SWITCHES IN ACCORDANCE WITH DASH 8 MAINTENANCE MANUAL
- [SDR PCAA0301013](https://openairdocs.org/sdr/PCAA0301013.md): Engine · leaking · Jan 12, 2003 · N846EX · Dhav DHC8102 · Engine Oil Indicating System
  > ELM-PIT FLIGHT#3856. CREW REPORTED LEFT ENGINE BELOW 40 PSI.WHILE ON APPROACH INTO PIT. ENGINE SHUT DOWN, EMERGENCY DECLARED. MAINTENANCE COMPLIED WITH UNSCHEDULED MAINTENANCE INSPECTION IN ACCORDANCE WITH PRATT AND WHITNEY MAINTENANCE MANUAL 05-50-00. NO DEFE
- [SDR PCAA0301006](https://openairdocs.org/sdr/PCAA0301006.md): Hydraulic Line · cracked · Jan 3, 2003 · N846EX · Dhav DHC8102 · Hydraulic System, Main
  > PIT- FLIGHT#3847. CREW REPORTED #2 HYDRAULIC ISOLATION VALVE CAUTION LIGHT ILLUMINATED ON GROUND.FLUID LOSS ON #2 SIDE, DOWN TO 3/4 OF A QUART. MAINTENANCE FOUND HYDRAULIC LINE PART NUMBER 82950010-351 CRACKED. INTERIM FLEX LINE INSTALLED AND SECURED. LEAK CHE
- [SDR PCAA0211141](https://openairdocs.org/sdr/PCAA0211141.md): Structure · bird strike · Nov 27, 2002 · N846EX · Dhav DHC8102 · Wing Main, Frame Structure
  > MDT-FLIGHT 3800 CREW REPORTED LARGE BIRD STRIKE ON RIGHT WING. DAMAGE CURRENTLY BEING EVALUATED. MAINTENANCE REPAIRED RIGHT WING IN ACCORDANCE WITH DEHAVILLAND REPAIR DRAWINGS RD8-57-2481, RD8-57-2482, RD8-53-2483, RD8-57-2484. WORK ACCOMPLISHED BY BOMBARDI
- [SDR PCAA0210126](https://openairdocs.org/sdr/PCAA0210126.md): Wire · loose · Oct 24, 2002 · N846EX · Dhav DHC8102 · Light System Wiring
  > DURING ROUTINE MAINTENANCE VISIT 5 LAMPS FOR EMERGENCY PATH FLOOR LIGHTS FOUND INOPERATIVE. WIRING WAS RESECURED. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.
- [SDR PCAA0210125](https://openairdocs.org/sdr/PCAA0210125.md): Control Box · inoperative · Oct 23, 2002 · N846EX · Dhav DHC8102 · Emergency Lighting
  > SCE FLIGHT#3836. CREW REPORTED EMERGENCY LIGHTS CAME ON WHEN CYCLED OFF WITH EXTERNAL POWER APPLIED. LIGHTS WORK NORMALLY WITH BATTERY POWER. MAINTENANCE REPLACED THE EMERGENCY LIGHTS CONTROL BOX. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.
- [SDR PCAA0210121](https://openairdocs.org/sdr/PCAA0210121.md): Battery · burned out · Oct 11, 2002 · N846EX · Dhav DHC8102 · Emergency Lighting
  > DURING ROUTINE MAINTENANCE VISIT RIGHT SIDE FUSELAGE AFT EMERGENCY LIGHT FOUND INOPERATIVE. EMERGENCY LIGHT BATTERY AT POSITION 600 REPLACED. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.
- [SDR PCAA0012080](https://openairdocs.org/sdr/PCAA0012080.md): Wire Rope · jammed · Dec 6, 2000 · N846EX · Dhav DHC8102 · Passenger/Crew Doors
  > PHL-FLIGHT 3571 PAX DOOR CABLE JAMMED. MAINTENANCE INSPECTED PAX DOOR ASSEMBLY.REMOVED CABLE FROM OUTER SUPPORT PULLEY.REINSTALLED CABLE ON OUTER SUPPORT PULLEY IN ACCORDANCE WITH DEHAVILLAND DASH 8 MAINTENANCE MANUAL 52-10-00. OPS CHECKS GOOD NO DEFECTS NOTED

## 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 = 'N846EX' AND deregistration_id = 'N846EX-2010-05-12'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/deregistered/N846EX-2010-05-12/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.