# Service difficulty reports: N120PC A list on [N120PC](https://openairdocs.org/aircraft/N120PC.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR HYIA20220701002](https://openairdocs.org/sdr/HYIA20220701002.md): Fitting · cracked · Jul 1, 2022 · N120PC · Cessna 402C · Fuselage Main, Structure > WHILE PERFORMING THE LIGHTED BORESCOPE PROCEDURE AS OUTLINED IN TEXTRON MEL-54-02 R2 TO SATISFY AD2017-10-19, A CRACK WAS IDENTIFIED ON THE OUTBOARD SIDE OF THE LEFT HAND OUTBOARD FITTING. THIS CRACK MEASURES.129 IN LENGTH, AND IT'S LOCATION IS CONSISTENT WI - [SDR HYIA20200508003](https://openairdocs.org/sdr/HYIA20200508003.md): Fitting · corroded · May 7, 2020 · N120PC · Cessna 402C · Nacelle/Pylon Miscellaneous Structure > WHILE PERFORMING LIGHTED BOROSCOPE INSPECTION PROCEDURE AS OUTLINED IN TEXTRON MEL-54-02R2 TO SATISFY AD2017-10-09, A SPOT OF CORROSION WAS IDENTIFIED ON THE RIGHT HAND OUTBOARD NACELLE FITTING (P/N: 5292029-24). THIS CORROSION IS LOCATED ON THE BOTTOM OF THE - [SDR HYIA20200521002](https://openairdocs.org/sdr/HYIA20200521002.md): Cylinder · low pressure · May 6, 2020 · N120PC · Cessna 402C · Reciprocating Engine Cylinder Section > PILOT REPORTED ROUGH RUNNING ENGINE. MAINTENANCE INSPECTED AND FOUND RIGHT #5 CYLINDER NO COMPRESSION. REMOVED AND REPLACED ENGINE WITH NO FURTHER DEFECT NOTED, AS WAS SCHEDULED FOR REMOVAL WITHIN 87 HOURS. - [SDR HYIA20190731001](https://openairdocs.org/sdr/HYIA20190731001.md): Fitting · corroded · Jul 31, 2019 · N120PC · Cessna 402C · Wing, Attach Fittings > DURING MAINTENANCE, TWO AREAS OF CORROSION WERE DISCOVERED ON THE HORIZONTAL FLANGE OF THE UPPER LEFT HAND AFT WING FITTING (P/N 0822550-45.) THESE AREAS OF CORROSION MEASURED.750 BY.250 WITH A DEPTH OF.042, AND.400 BY.250 WITH A DEPTH OF.031. THIS FITTI - [SDR HYIA20190724001](https://openairdocs.org/sdr/HYIA20190724001.md): Spar Cap · corroded · Jul 24, 2019 · N120PC · Cessna 402C · Wing Spar > DURING MAINTENANCE CORROSION WAS DISCOVERED ON THE LEFT HAND LOWER AFT SPAR CAP P/N: 5122041-23. THIS CORROSION IS LOCATED IN THE FORWARD RADIUS OF THE HORIZONTAL AND VERTICAL LEGS OF THE CAP AT APPROXIMATE LWS 228.71. THIS CORROSION HAS A DEPTH OF APPROXIMATE - [SDR HYIA20190718001](https://openairdocs.org/sdr/HYIA20190718001.md): Spar Cap · corroded · Jul 16, 2019 · N120PC · Cessna 402C · Wing Spar > DURING MAINTENANCE AN AREA OF CORROSION WAS IDENTIFIED ON THE HORIZONTAL LEG OF THE LEFT HAND UPPER OUTBOARD SPAR CAP (P/N: 5122041-21). THIS CORROSION IS LOCATED AT APPROXIMATE LEFT WING STATION 197.71 AND MEASURES APPROXIMATELY.022 INCHES DEEP. THIS IS IN E - [SDR HYIA20161010171](https://openairdocs.org/sdr/HYIA20161010171.md): Exhaust Valve · damaged · Oct 10, 2016 · N120PC · Cessna 402C · Reciprocating Engine Cylinder Section > CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION; EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE. - [SDR HYIA20160815073](https://openairdocs.org/sdr/HYIA20160815073.md): Exhaust Valve · damaged · Aug 14, 2016 · N120PC · Cessna 402C · Reciprocating Engine Cylinder Section > CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION; EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE. - [SDR HYIA20160520002](https://openairdocs.org/sdr/HYIA20160520002.md): Selector · out of rig · May 14, 2016 · N120PC · Cessna 402C · Fuel Selector/Shut-Off Valve > LEFT ENG FUEL FLOW WENT TO 0 IN FLIGHT. FOUND FUEL SELECTOR OUT OF RIG & RIGGED & RELEASED ACFT FOR FLIGHT CHECK. INSPECTED FUEL BOWL AS PRECAUTION. - [SDR HYIA20141231001](https://openairdocs.org/sdr/HYIA20141231001.md): Fan · malfunctioned · Dec 28, 2014 · N120PC · Cessna 402C · Air Distribution Fan > THE LT ANNUNCIATOR INTERMITTENT & AN ELEC SMELL IN CABIN. INSPECTED, R & R LT ALTERNATOR OUT SENSOR IAW MM CH 34-30-0. OPERATIONS CHECKED GOOD. THE SMELL WAS DETERMINED TO BE THE CABIN VENT FAN WHICH WAS PLACED ON MEL. NO FURTHER DEFECTS NOTED. - [SDR HYIA20140606001](https://openairdocs.org/sdr/HYIA20140606001.md): Sight Tube · split · May 14, 2014 · N120PC · Cessna 402C · Hydraulic Quantity Indicator > PILOT REPORTED AFTER DEPARTURE FROM MAZ & DURING TRANSITION FROM CLIMB TO CRUISE SMOKE & FUMES WERE DETECTED COMING FROM DEFROST VENT. PILOT CLOSED DEFROST, RAM AIR & CABIN AIR VENT VLVS. UPON CLOSING CABIN VENTILATION VLVS, PILOT REPORTS SMOKE & FUMES NO LO - [SDR HYIA20120910003](https://openairdocs.org/sdr/HYIA20120910003.md): Spar · corroded · Sep 10, 2012 · N120PC · Cessna 402C · Wing Main, Frame Structure > DURING A REGULARLY SCHEDULED MX, DAMAGE WAS DISCOVERED TO THE RT SPAR STRAP. DAMAGE WAS A MISDRILL AND INTERGRANULAR CORROSION. BASED ON THE DAMAGE NOTED, REMOVED DAMAGED PART AND INSTALLED NEW PART. - [SDR HYIA20120910002](https://openairdocs.org/sdr/HYIA20120910002.md): Spar · cracked · Sep 10, 2012 · N120PC · Cessna 402C · Fuselage Main, Structure > DURING REGULARLY SCHEDULED MX INSPECTION, DAMAGE WAS NOTED TO THE AFT CARRY THROUGH SPAR ASSY UPPER FORWARD AND AFT WEB FLANGES. FLANGES WERE FOUND TO BE CRACKED AT FLOOR SUPPORT MOUNT LOCATIONS. OPEN - [SDR HYIA201205170001](https://openairdocs.org/sdr/HYIA201205170001.md): Spar · damaged · May 16, 2012 · N120PC · Cessna 402C · Wing Spar > DURING A SCHEDULED MX EVENT, IT WAS NOTED THAT THE RT SPAR STRAP HAD PREVIOUSLY SUSTAINED DAMAGE. UPON NOTING THIS DISCREPANCY, A WO WAS SUBMITTED TO MRO FOR REMOVAL AND REPLACEMENT OF THE RT SPAR STRAP. THE ACFT IS GROUNDED AWAITING THE REQUIRED REPAIRS. - [SDR HYIA201203198521](https://openairdocs.org/sdr/HYIA201203198521.md): Indication Sys · inaccurate · Mar 19, 2012 · N120PC · Cessna 402C · Fuel Indicating System > DURING CRUISE, LEFT ENGINE STARTED TO LOOSE POWER. PILOT NOTICED LT FUEL FLOW LOWER THAN 70 LBS MIN AND DECREASING. PILOT SWITCHED THE LT AUX FUEL PUMP TO HIGH AND ENGINE RAN NORMAL. AFTER 30 SECONDS, THE FUEL FLOW STARTED TO DECREASE AGAIN. THE ENGINE BEC - [SDR HYIA20140415066](https://openairdocs.org/sdr/HYIA20140415066.md): Drag Brace · cracked · Jul 13, 2011 · N120PC · 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 HYIAN120PCLITES](https://openairdocs.org/sdr/HYIAN120PCLITES.md): Dimmer · failed · Feb 22, 2010 · N120PC · Cessna 402C · Flight Compartment Lighting > CREW REPORTED BURNING ELECTRICAL ODOR FLOWED THROUGH COCKPIT. ALL NON-ESSENTIAL EQUIPMENT WAS TURNED OFF. SHORTLY AFTER, A SMALL STREAM OFF SMOKE AROSE FROM AREA JUST FWD OF THROTTLE LEVERS. IFR CLEARANCE CANCELLED, DIVERTED, AFTER COMPLYING WITH SMOKE IN THE - [SDR HYIA120PC AVMSTR](https://openairdocs.org/sdr/HYIA120PC%20AVMSTR.md): Circuit Breaker · unserviceable · Dec 26, 2009 · N120PC · Cessna 402C · DC Power Distribution System > CREW REPORTED AVIONICS MASTER SWITCH TRIPPED ONCE DURING FLIGHT. MX REMOVED AND REPLACED CIRCUIT BREAKER SWITCH. SYS CHECKS OK. ACFT RELEASED BACK TO SERVICE. - [SDR 1350516N120PC](https://openairdocs.org/sdr/1350516N120PC.md): Master Switch · defective · Jul 24, 2006 · N120PC · Cessna 402C · Alternator-Generator Drive > CREW REPORTED AVIONICS MASTER SWITCH INOP. MX CHANGED CIRCUIT BREAKER SWITCH. - [SDR HYI2003F00016](https://openairdocs.org/sdr/HYI2003F00016.md): Distributor Gear · failed · Aug 27, 2003 · N120PC · Cessna 402C · Magneto/Distributor > ON CLIMB OUT, PILOT REPORTED RIGHT ENGINE RUNNING ROUGH, RETURNED W/O INCIDENT. MECHANIC FOUND RT ENGINE/ LEFT MAGNETO DIST GEAR FAILED. REMOVED AND REPLACED MAGNETO AND RETURNED A/C TO SERVICE. - [SDR HYI2001F00011](https://openairdocs.org/sdr/HYI2001F00011.md): Drag Brace · cracked · Nov 20, 2001 · N120PC · Cessna 402C · Landing Gear Retraction/Extension System > DURING SCHEDULED INSPECTION, MECHANIC FOUND NOSE GEAR DRAG BRACE CRACKED AT ACTUATOR ATTACH LUG. REMOVED AND REPLACED DRAG BRACE AND RETURNED AIRCRAFT TO SERVICE. - [SDR 96ZZZX1248](https://openairdocs.org/sdr/96ZZZX1248.md): Switch · burned · May 8, 1995 · N120PC · Cessna 402C · DC Power Distribution System > DURING CRUISE FLIGHT, CABIN STARTED FILLING WITH SMOKE. SMOKE WAS ORIGINATING FROM AVIONICS MASTER SWITCH - UNABLE TO TURN SWITCH OFF, SO CIRCUIT BREAKERS WERE PULLED. SMOKE EVACUATION PROCEDURES WERE INITIATED AND SMOKE SUBSIDED. A NORMAL LANDING WAS MADE. ## 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 = 'N120PC' AND registry_match = 'registration' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/aircraft/N120PC/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.