# Service difficulty reports: N494BC A list on [N494BC](https://openairdocs.org/aircraft/N494BC.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR HYIA20250627001](https://openairdocs.org/sdr/HYIA20250627001.md): Crossbeam · cracked · Jun 24, 2025 · N494BC · Cessna 402C · Nacelle/Pylon, Main Frame > DURING INSPECTION A CRACK WAS VISUALLY NOTED ON THE LEFT HAND CROSSOVER BEAM (OEM 5654104-11). THIS CRACK IS LOCATED ON THE AFT FACE OF THE BEAM AT APPROXIMATE LWS 81.62. THE CRACK IS APPROXIMATELY.500 INCHES LONG AND.250 INCHES DOWN FROM THE TOP EDGE OF TH - [SDR HYIA20250515001](https://openairdocs.org/sdr/HYIA20250515001.md): Wire · shorted · May 12, 2025 · N494BC · Cessna 402C · Electrical Power System Wiring > PILOT REPORTED LEFT ENGINE CYLINDER TEMP INDICATIONS WERE IN THE RED ON TAXI OUT. MAINTENANCE INSPECTED AND FOUND THE POSITIVE WIRE TO THE ALTERNATOR SHORTED INTO THE ADEL CLAMP AT THE CROSSOVER BEAM. THIS CAUSED DAMAGE TO THE SURROUNDING WIRE HARNESS AND HOSE - [SDR HYIA20210817001](https://openairdocs.org/sdr/HYIA20210817001.md): Attach Fitting · corroded · Aug 16, 2021 · N494BC · Cessna 402C · Wing, Attach Fittings > DURING MAINTENANCE A SPOT OF CORROSION WAS VISUALLY IDENTIFIED ON THE LEFT HAND UPPER FORWARD WING ATTACH FITTING. IT IS LOCATED ON THE BOTTOM FACE OF THE UPPER HORIZONTAL LEG OF THE FITTING AND MEASURES APPROXIMATELY.555 INCHES LONG,.300 INCHES WIDE, AND.0 - [SDR HYIA20210611002](https://openairdocs.org/sdr/HYIA20210611002.md): Line · cracked · May 28, 2021 · N494BC · Cessna 402C · Hydraulic System, Main > NOSE GEAR LIGHT DID NOT ILLUMINATE ON EXTENSION, AIRCRAFT LANDED WITH GEAR UNLOCKED, GEAR COLLAPSED ON LANDING. NO INJURIES. INSPECTED AIRCRAFT AND FOUND HYDRAULIC PRESSURE LINE IN RIGHT WING CRACKED AND BLOWDOWN BOTTLE DID NOT DISCHARGE. - [SDR HYIA20190925001](https://openairdocs.org/sdr/HYIA20190925001.md): Beam · cracked · Sep 25, 2019 · N494BC · Cessna 402C · Nacelle/Pylon, Main Frame > DURING MAINTENANCE A CRACK WAS VISUALLY IDENTIFIED ON THE AFT SIDE OF THE RIGHT NACELLE CROSSOVER BEAM (P/N: 5654104-12). THIS CRACK MEASURES APPROXIMATELY 1.302 INCHES IN LENGTH, AND BEGINS AT THE OUTBOARD TURBO BRACKET MOUNTING HOLE ON THE AFT FACE OF THE BE - [SDR HYIA20190920001](https://openairdocs.org/sdr/HYIA20190920001.md): Beam · cracked · Sep 19, 2019 · N494BC · Cessna 402C · Nacelle/Pylon, Main Frame > DURING X-RAY INSPECTION OF THE RIGHT HAND INBOARD ENGINE BEAM TO SATISFY THE REQUIREMENT OF AD 97-26-16, A CRACK WAS IDENTIFIED TRAVELING IN A DIRECTION TRANSVERSE TO THE LENGTH OF THE BEAM ACROSS THE TOP OF THE ENGINE BEAM ASSEMBLY. THIS CRACK IS LOCATED APPR - [SDR HYIA20170828009](https://openairdocs.org/sdr/HYIA20170828009.md): Fitting · cracked · Apr 14, 2017 · N494BC · Cessna 402C · Nacelle/Pylon, Attach Fittings > DURING A ROUTINE INSPECTION, A CRACK WAS DISCOVERED IN THE RT OUTBOARD NACELLE FITTING. THE CRACK WAS FOUND ON THE INBOARD SIDE OF THE FITTING, JUST FORWARD OF THE SPAR STRAP. THE CRACK MEASURED.098 IN LENGTH. - [SDR HYIA20170828008](https://openairdocs.org/sdr/HYIA20170828008.md): Fitting · cracked · Mar 28, 2017 · N494BC · Cessna 402C · Nacelle/Pylon, Attach Fittings > DURING A ROUTINE INSPECTION, THREE CRACKS WERE FOUND ON THE LT OUTBOARD NACELLE FITTING. THESE CRACKS WERE DISCOVERED ON THE INBOARD SIDE OF THE FITTING, JUST FORWARD OF THE SPAR STRAP. THE CRACKS MEASURED.088,.097, AND.155 IN LENGTH. - [SDR HYIA20160913161](https://openairdocs.org/sdr/HYIA20160913161.md): Exhaust Valve · damaged · Sep 28, 2016 · N494BC · Cessna 402C · Reciprocating Engine Cylinder Section > CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION; EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE. - [SDR HYIA20150918002](https://openairdocs.org/sdr/HYIA20150918002.md): Door · open · Sep 15, 2015 · N494BC · Cessna 402C · Wing, Plate/Skin > PILOT REPORTED THE LT WING LOCKER OPENED DURING FLIGHT. INSPECTED THE LT WING LOCKER DOOR & LATCH ASSEMBLY WITH NO DEFECT NOTED. OPERATIONS CHECKED GOOD. - [SDR HYIA20150804001](https://openairdocs.org/sdr/HYIA20150804001.md): Fluid · low · Jul 29, 2015 · N494BC · Cessna 402C · Master Cylinder/Brake Valve > LOST BRAKING FOR A FEW SECONDS ON LANDING ROLLOUT. FIRST ON CO-PILOT SIDE THEN ON PILOT SIDE. INSPECTED BRAKE LINING & PADS ON LT & RT SIDE. INSPECTED FOR LEAKS, NO DEFECTS NOTED, SERVICED BOTH BRAKE MASTER CYLINDERS WITH FLUID. OPERATIONS CHECKED GOOD. - [SDR HYIA20150624002](https://openairdocs.org/sdr/HYIA20150624002.md): Linkage · unsecure · Jun 19, 2015 · N494BC · Cessna 402C · Propeller Controlling System > PILOT REPORTED RPM LOSS ON THE RT ENG DROPPED FROM 2300 TO 2000 RPM. WOULD NOT CHANGE WHEN MOVING PROP LEVER. SECURED PROP LINKAGE IAW MM CH 61-20-00. OPERATIONALLY CHECKED GOOD. - [SDR HYIA201504130001](https://openairdocs.org/sdr/HYIA201504130001.md): Spar · chafed · Apr 10, 2015 · N494BC · Cessna 402C · Wing Spar > UPON REMOVAL OF LT MLG HYD EXTEND & RETRACT ACTUATOR TO FACILITATE OTHER MAINTENANCE, A HOLE WAS DISCOVERED IN THE LT WING FWD SPAR WEB. THE HOLE IS LOCATED AT APPROX LT WS 91.62 & WAS CREATED WHEN COTTER PIN USED TO SAFETY HARDWARE STACK UP AT UPPER MLG ACTU - [SDR HYIA20121003004](https://openairdocs.org/sdr/HYIA20121003004.md): Spark Plug · worn · Sep 29, 2012 · N494BC · Cessna 402C · Spark Plug/Igniter > PILOT REPORTED THAT AFTER TAKEOFF, A VIBRATION WAS FELT THROUGHOUT THE AIRFRAME. ELECTED TO RETURN TO DEPARTURE. ALL PANELS AND DOORS WERE INSPECTED FOR SAFETY AND SECURITY AS A PROBABLE CAUSE OF VIBRATION, NO DEFECTS NOTED. INSPECTED ENGINES. RT ENGINE - [SDR HYIA20140415079](https://openairdocs.org/sdr/HYIA20140415079.md): Drag Brace · cracked · Aug 30, 2012 · N494BC · Cessna 402C · Landing Gear Retraction/Extension System > AT SCHEDULED INSPECTION, NLG DRAG BRACE, PN 5142002-5, WAS FOUND TO BE CRACKED IN THE AREA OF NLG ACTUATOR ATTACH POINT. METHOD OF INSPECTION WAS DYE PENETRANT. THIS CRACK WAS FOUND TO BE WITHIN ALLOWABLE LIMIT OF MEB91-11R1. THIS UNIT HAS BEEN REPAIRED IAW - [SDR HYIA20140414006](https://openairdocs.org/sdr/HYIA20140414006.md): Drag Brace · cracked · Aug 11, 2011 · N494BC · Cessna 402C · Landing Gear Retraction/Extension System > AT SCHEDULED INSPECTION, NLG DRAG BRACE, PN 5142002-5, WAS FOUND TO BE CRACKED IN THE AREA OF NLG ACTUATOR ATTACH POINT. METHOD OF INSPECTION WAS DYE PENETRANT. THIS CRACK WAS FOUND TO BE BEYOND LIMIT ALLOWABLE OF MEB91-11R1. THIS UNIT HAS BEEN SCRAPPED & A - [SDR HYIA01](https://openairdocs.org/sdr/HYIA01.md): Nut · cracked · Jun 23, 2011 · N494BC · Cessna 402C · Reciprocating Engine Cylinder Section > THE NR 3 CYLINDER OF THE RIGHT ENGINE HAD A CRACKED HOLD DOWN NUT. - [SDR HYIA20140415007](https://openairdocs.org/sdr/HYIA20140415007.md): Drag Brace · cracked · Jan 21, 2011 · N494BC · Cessna 402C · Landing Gear Retraction/Extension System > AT SCHEDULED INSPECTION, NLG DRAG BRAC OEM PN 5142002-5 WAS FOUND TO BE CRACKED IN THE AREA OF NLG ACTUATOR ATTACH POINT. METHOD OF INSPECTION WAS DYE PENETRANT. THIS CRACK WAS FOUND TO BE WITHIN ALLOWABLE LIMIT. THIS UNIT HAS BEEN REPAIRED IAW PROCEDURE OU - [SDR HYIA494BCRTENG](https://openairdocs.org/sdr/HYIA494BCRTENG.md): Fuel Control · out of adjust · Dec 7, 2010 · N494BC · Cessna 402C · Fuel Controlling System > CREW REPORTED, WHILE PERFORMING "IN RANGE" CHECKLIST, RT ENGINE QUIT. CREW PERFORMED ENGINE FAILURE CHECKLIST, AND WHEN AUXILARY FUEL PUMP WAS TURNED ON HIGH POSITION, ENGINE POWER WAS RESTORED. EMERGENCY WAS DECLARED, AND CREW ELECTED TO DIVERT BECAUSE OF BET - [SDR HYIA494BCKG102](https://openairdocs.org/sdr/HYIA494BCKG102.md): Gyro · failed · Aug 25, 2010 · N494BC · Cessna 402C · Directional Gyro and Indicating System > CREW REPORTED HSI FAILED (FROZEN) DURING CLIMB IN HEAVY RAIN AND MODERATE TURBULENCE. EMERGENCY DECLARED, DIVERTED. LANDING WAS UNEVENTFUL. MX FOUND REMOTE GRYO CIRCUIT BREAKER POPPED. R & R REMOTE GYRO. ACFT RELEASED BACK TO SERVICE. - [SDR HYIA404BCNGEAR](https://openairdocs.org/sdr/HYIA404BCNGEAR.md): Line · split · Nov 21, 2009 · N494BC · Cessna 402C · Hydraulic System, Main > WHILE EN ROUTE, THE RT HYD FLOW LIGHT BEGAN TO FLICKER, FOLLOWED SHORTLY THEREAFTER BY THE LT HYD FLOW LIGHT. COMPLETED HYD FLOW "LIGHT ILLUMINATED IN FLIGHT" CHECKLIST. ON DESCENT, LOWERED LANDING GEAR; GREEN NOSE WHEEL GEAR INDICATION LIGHT DID NOT ILLUMINAT - [SDR HYIA494BC](https://openairdocs.org/sdr/HYIA494BC.md): Master Switch · inoperative · Jun 21, 2009 · N494BC · Cessna 402C · Electrical Power System > CREW REPORTED AVIONIC MASTER SWITCH INOPERATIVE. MX REMOVED AND REPLACED SWITCH, AND RETURNED ACFT TO SERVICE. - [SDR GNB2005F00004](https://openairdocs.org/sdr/GNB2005F00004.md): Valve · warped · Jun 8, 2005 · N494BC · Cessna 402C · Exhaust Turbocharger > WARPED VALUE. (K) ## 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 = 'N494BC' AND registry_match = 'registration' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/aircraft/N494BC/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.