# Service difficulty reports: Viking DHC-6-400 A list on [Viking DHC-6-400](https://openairdocs.org/model/viking-dhc-6-400.md). Newest first. General aviation reporting is voluntary. - [SDR G7HA202307130001](https://openairdocs.org/sdr/G7HA202307130001.md): Distribution Vlv · burned · Jul 13, 2023 · N814SS · Vikair DHC6400 · Airfoil Anti/De-ice System > ON TEN OCCASIONS SINCE 2020, PILOTS REPORTED THE UNCOMMANDED INFLATION OF ALL THEIR DEICE BOOTS AT ONCE DURING TAKE-OFF. ON EVERY OCCASION, THEY WERE ABLE TO RESET THE SYSTEM AND RESTORE THE PROPER OPERATION OF THE BOOTS. THE SYSTEM RESUMED PROPER SEQUENTIAL I - [SDR 8G9R705D](https://openairdocs.org/sdr/8G9R705D.md): Switch · inoperative · May 23, 2022 · N419BT · Vikair DHC6400 · Landing Gear Retraction/Extension System > AIRCRAFT NLG DID NOT RETRACT AFTER TAKEOFF. ABLE TO LAND WITHOUT INCIDENT. UPON INSPECTION, TECHNICIANS FOUND CENTERING SWITCH OUT OF ADJUSTMENT. TECHNICIANS CORRECTED SWITCH. AIRCRAFT MAY HAVE EXPERIENCED A LANDING GEAR OVERSPEED CONDITION SO AN INSPECTION WA - [SDR 2021F00206](https://openairdocs.org/sdr/2021F00206.md): Circuit Card · shorted · Jul 22, 2021 · N600MH · Vikair DHC6400 · Electrical Power System Wiring > ON JULY 22, 2021 AT APPROXIMATELY 0920, INFLIGHT AND IN IMC WHILE PERFORMING THE RNAV RWY 5 APPROACH INTO PAAD THE CREW EXPERIENCED A TEMPORARY LOSS OF VERTICAL AND LATERAL COURSE GUIDANCE AND A CASCADING PRESENTATION OF CAS MESSAGES INCLUDING AMBER: AGM 2 FA - [SDR CA190808010](https://openairdocs.org/sdr/CA190808010.md): Screw · wrong part · Aug 8, 2019 · Vikair DHC6400 · Control Column Section > (CAN) DEFECT DESCRIPTION DWG: C6CF1225 REV U. IN ASSY 3, 6 AN526-632R4 SCREWS WERE FOUND NONCONFORMING, NOT IN SAFETY OF THE ANCHOR NUT ON THE C6CF1244-3 FWD COVER OF THE C6CF1225-S7 CONTROL COLUMN CONTAIN ACTION WAS CARRIED OUT IN YYJ ON MSN AIRCRAFT NUMBER - [SDR CA190807008](https://openairdocs.org/sdr/CA190807008.md): Rod End · corroded · Aug 6, 2019 · Vikair DHC6400 · Fuel Control/Reciprocating Engines > (CAN) MSN 974 LEFT ENGINE FAILED TO RETURN TO LOWER POWER SETTING DURING TAXI THIS MORNING. WHEN L/H POWER LEVER RETURN TO IDLE POSITION THE NG STILL 68%, R/H IS NORMAL. AFTER REMOVE THE FCU CONTROL ROD, CORROSION IS FOUND ON ROD END BEARING. THEN WE HAVE RE - [SDR CA190528017](https://openairdocs.org/sdr/CA190528017.md): Washer · missing · May 28, 2019 · Vikair DHC6400 · Power Lever > (CAN) QTY 2 COTTER PINS MS24665-132 AND QTY 2 WASHERS AN960PD316L WERE NOT INSTALLED AS SHOWN IN MANUFACTURING DRAWINGS. VIKING IS CONTINUING TO INVESTIGATE (TC# 20190528017) - [SDR 2019FA0000164](https://openairdocs.org/sdr/2019FA0000164.md): Control Quadrant · loose · May 27, 2019 · N153QS · Vikair DHC6400 · Rudder Control System > THE QUADRANT ON RUDDER TORQUE TUBE WAS FOUND TO HAVE MOVEMENT BETWEEN THE TUBE AND THE QUADRANT. UPON LAST INSTALLATION A INDEX LINE WAS PLACED ON THE TUBE AND QUADRANT. WITH THE GUST LOCK ON AND THE RUDDER PEDALS MOVED BY AN INDIVIDUAL THERE WAS MOVEMENT OF T - [SDR 2019FA0000163](https://openairdocs.org/sdr/2019FA0000163.md): Control Quadrant · loose · May 27, 2019 · N153QS · Vikair DHC6400 · Rudder Control System > THE QUADRANT ON RUDDER TORQUE TUBE WAS FOUND TO HAVE MOVEMENT BETWEEN THE TUBE AND THE QUADRANT. UPON LAST INSTALLATION A INDEX LINE WAS PLACED ON THE TUBE AND QUADRANT. WITH THE GUST LOCK ON AND THE RUDDER PEDALS MOVED BY AN INDIVIDUAL THERE WAS MOVEMENT OF T - [SDR 2019FA0000162](https://openairdocs.org/sdr/2019FA0000162.md): Control Quadrant · loose · May 27, 2019 · N153QS · Vikair DHC6400 · Rudder Control System > THE QUADRANT ON RUDDER TORQUE TUBE WAS FOUND TO HAVE MOVEMENT BETWEEN THE TUBE AND THE QUADRANT. UPON LAST INSTALLATION A INDEX LINE WAS PLACED ON THE TUBE AND QUADRANT. WITH THE GUST LOCK ON AND THE RUDDER PEDALS MOVED BY AN INDIVIDUAL THERE WAS MOVEMENT OF T - [SDR 2019FA0000161](https://openairdocs.org/sdr/2019FA0000161.md): Control Quadrant · loose · May 27, 2019 · N153QS · Vikair DHC6400 · Rudder Control System > THE QUADRANT ON RUDDER TORQUE TUBE WAS FOUND TO HAVE MOVEMENT BETWEEN THE TUBE AND THE QUADRANT. UPON LAST INSTALLATION A INDEX LINE WAS PLACED ON THE TUBE AND QUADRANT. WITH THE GUST LOCK ON AND THE RUDDER PEDALS MOVED BY AN INDIVIDUAL THERE WAS MOVEMENT OF T - [SDR 2019FA0000160](https://openairdocs.org/sdr/2019FA0000160.md): Control Quadrant · loose · May 27, 2019 · N153QS · Vikair DHC6400 · Rudder Control System > THE QUADRANT ON RUDDER TORQUE TUBE WAS FOUND TO HAVE MOVEMENT BETWEEN THE TUBE AND THE QUADRANT. UPON LAST INSTALLATION A INDEX LINE WAS PLACED ON THE TUBE AND QUADRANT. WITH THE GUST LOCK ON AND THE RUDDER PEDALS MOVED BY AN INDIVIDUAL THERE WAS MOVEMENT OF T - [SDR CA190522024](https://openairdocs.org/sdr/CA190522024.md): Control Rod · damaged · May 9, 2019 · Vikair DHC6400 · Passenger/Crew Doors > (CAN) ON THE 9TH OF MAY DURING PRE-FLIGHT CHECKS ON DQ-FLA (MSN: 968) THE CONTROL ROD ASSY (PN: C6FS5018 3) ON THE DOOR AIRSTAIR CABIN WAS FOUND DAMAGED. UPON FURTHER INVESTIGATION, IT WAS FOUND THAT THE CONTROL ROD ASSEMBLY FAILED DUE TO EXCESSIVE CORROSION - [SDR CA190528016](https://openairdocs.org/sdr/CA190528016.md): Sump · malfunctioned · May 8, 2019 · Vikair DHC6400 · Fuel Storage > (CAN) SEVERAL SUMPS DISPLAYED VARIOUS DEGREES OF FUEL SEEPAGE DURING THE PAINT INSPECTION AT SPOKANE ON APRIL 15. THE SUMPS WERE CLEANED AND DRIED AT THAT TIME TO BE RE-EVALUATED AT YYJ. THE AIRCRAFT WAS LEFT WITH 660 LBS. OF FUEL IN THE FWD TANK AND 805 LBS. - [SDR CA190528018](https://openairdocs.org/sdr/CA190528018.md): Rod End · damaged · Apr 26, 2019 · Vikair DHC6400 · Engine Controls > (CAN) VSC30-3A ROD ENDS MAY HAVE CONDITIONS. MISSING HARD CHROME PLATING OF ROD END BALL AS PER VSC30 REV A. DEFECTS FOUND ON BEARING RACE SUCH AS NICKS, JAGGED EDGES, BURR`S ETC. MISSING PART MARKING AS PER NOTE 8 OF SPECLINE DWG 75E03-303A REV C. PART - [SDR CA190418011](https://openairdocs.org/sdr/CA190418011.md): Screen · corroded · Apr 15, 2019 · Vikair DHC6400 · Indicating/Recording System > (CAN) MAU COOLING FAN SCREEN FOUND CORRODED AND WITH PIECES MISSING. VIKING IS CONTINUING TO INVESTIGATE. ATA 31 (TC# 20190418011) - [SDR CA190412002](https://openairdocs.org/sdr/CA190412002.md): Rod End · failed · Apr 7, 2019 · Vikair DHC6400 · Passenger/Crew Doors > (CAN) ROD END FAILED DUE TO CORROSION. HAS REQUESTED THE PARTS TO BE RETURNED FOR INVESTIGATION. (TC# 20190412002) - [SDR CA190327025](https://openairdocs.org/sdr/CA190327025.md): Pressure Switch · intermittent · Mar 21, 2019 · Vikair DHC6400 · Hydraulic Indicating System > (CAN) HYDRAULIC PRESSURE SWITCH P/N P12M-H185 S/N 102 WAS SNAGGED FOR INTERMITTENT OPERATION PRIOR TO A/C DEPARTURE. - [SDR CA190424021](https://openairdocs.org/sdr/CA190424021.md): Hose · leaking · Nov 18, 2018 · Vikair DHC6400 · Engine Air Intake System > (CAN) HOSE SPLIT AND LEAKING. - [SDR CA180616005](https://openairdocs.org/sdr/CA180616005.md): Probe · false indication · May 28, 2018 · Vikair DHC6400 · Fuel Indicating System > (CAN) FALSE INDICATION OF AMOUNT OF FUEL ATA 28-00. (TC# 20180616005) - [SDR CA180616004](https://openairdocs.org/sdr/CA180616004.md): Pressure Switch · broken · May 28, 2018 · Vikair DHC6400 · Aircraft Fuel Distribution System > (CAN) FALSE INDICATION OF AMOUNT OF FUEL ATA 28-00. (TC# 20180616004) - [SDR CA180616003](https://openairdocs.org/sdr/CA180616003.md): Pressure Switch · fluctuates · May 12, 2018 · Vikair DHC6400 · Hydraulic Pressure Regulator, Auxiliary > (CAN) HYDRAULIC PRESSURE SWITCH PRE MOD 6/2313 DROPS TO 1220 PSI. OUTSIDE THE PERMISSIBLE LIMIT, SWITCH OPENS AT INCONSISTENT PRESSURES IN 1480, 1520,1500 PSI`S ATA 29-00. (TC# 20180616003) - [SDR CA180404016](https://openairdocs.org/sdr/CA180404016.md): Control Cable · chafed · Apr 2, 2018 · Vikair DHC6400 · Aileron Control System > (CAN) DURING THE EMMA 2 INSPECTION IT WAS DISCOVERED THAT THE LEFT HAND AILERON CABLE WAS CHAFING ON THE STEERING CABLE AT THE BASE OF THE YOKE. THE CHAFING OCCURRED AS THE YOKE WAS PULLED BACK PAST LEVEL FLIGHT. CABLES WERE INSPECTED AND FOUND TO BE UNDAMA - [SDR CA180222018](https://openairdocs.org/sdr/CA180222018.md): Pump · failed · Jan 24, 2018 · Vikair DHC6400 · Fuel Boost Pump > (CAN) FORWARD BOOT PUMP 1 FAILURE ON TAXI IN AT GLA. (TC NR 20180222018). ## 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 aircraft_model_key = 'DHC6400' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/model/viking-dhc-6-400/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.