# Service difficulty reports: N421MA A list on [N421MA](https://openairdocs.org/aircraft/N421MA.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR JIKA2026070901](https://openairdocs.org/sdr/JIKA2026070901.md): Hydraulic Line · failed · Jul 6, 2026 · N421MA · Swrngn SA227AC · Hydraulic System, Main > THE FLIGHT CREW REPORTED THAT THEY EXPERIENCED A LOSS OF HYDRAULIC PRESSURE IN FLIGHT AND THAT AN EMERGENCY LANDING GEAR EXTENSION WAS PERFORMED. THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. BUR MAINTENANCE FOUND THE HYDRAULIC LINE TO THE #1 FLAP FAILED AND T - [SDR JIKA201609060001](https://openairdocs.org/sdr/JIKA201609060001.md): Governor · leaking · Sep 6, 2016 · N421MA · Swrngn SA227AC · Propeller Governor > THE PILOT WAS EN-ROUTE AND WAS ACQUIRING TEND MONITORING DATA AND NOTICED THAT THE RT ENGINE HAD EXCESSIVELY HIGH OIL TEMPERATURE. THE PILOT FOLLOWED THE ABNORMAL PROCEDURES CHECKLIST AND PERFORMED AN IN-FLIGHT SHUTDOWN OF THE RT ENGINE. HE RETURNED TO DEPAR - [SDR JIKA20030005](https://openairdocs.org/sdr/JIKA20030005.md): Frame · cracked · Dec 10, 2003 · N421MA · Swrngn SA227AC · Fuselage Main, Frame > CRACKS FOUND ON LT AND RT SIDES OF FUSELAGE FRAME, P/N 27-22109-017, DURING LETTER CHECK E AT FS 422.271. - [SDR JIKA20030004](https://openairdocs.org/sdr/JIKA20030004.md): Frame · cracked · Dec 10, 2003 · N421MA · Swrngn SA227AC · Fuselage Main, Frame > CRACKS FOUND ON LT AND RT SIDES OF FUSELAGE FRAME, DURING LETTER CHECK E AT FS 407.271. - [SDR JIKA200300003](https://openairdocs.org/sdr/JIKA200300003.md): Frame · cracked · Dec 9, 2003 · N421MA · Swrngn SA227AC · Fuselage Main, Frame > CRACKS FOUND ON LT AND RT SIDES OF FUSELAGE FRAME, P/N 27-22104-046, DURING LETTER CHECK E AT FS 392.271. - [SDR MALA975333](https://openairdocs.org/sdr/MALA975333.md): Sas Servo · failed · Feb 26, 1997 · N421MA · Swrngn SA227AC · Stall Warning System > FLT 3482 - DURING TAXI, ELEVATOR JAMMED WHILE CREW PERFORMED FLIGHT CONTROL CHECK. TAKEOFF ABORTED. MAINTENANCE REMOVED AND REPLACED SAS SERVO. OPS CHECK GOOD. (M) - [SDR MALA975315](https://openairdocs.org/sdr/MALA975315.md): Actuator · failed · Feb 7, 1997 · N421MA · Swrngn SA227AC · Landing Gear Actuator > FLT 3479 - ON APPROACH INTO DTW, RIGHT MAIN GEAR DID NOT INDICATE DOWN AND LOCKED. CREW CYCLED GEAR TWICE AND DID GET DOWN AND LOCKED INDICATION. AIRCRAFT LANDED IN DTW WITH NO INCIDENT. MAINTENANCE REPLACED RIGHT OUTBOARD MAIN LANDING GEAR ACTUATOR. (M) - [SDR MALA975290](https://openairdocs.org/sdr/MALA975290.md): Downlock Switch · failed · Jan 17, 1997 · N421MA · Swrngn SA227AC · Landing Gear Position and Warning > FLT 3038 - ON APPROACH INTO STC, GEAR WAS CYCLED SIX TIMES TO GET GREEN DOWN INDICATION ON RIGHT SIDE. MAINTENANCE REPLACED MAIN LANDING GEAR DOWN LOCK SWITCH. (M) - [SDR MALA965249](https://openairdocs.org/sdr/MALA965249.md): Rib · chafed · Dec 19, 1996 · N421MA · Swrngn SA227AC · Wing, Rib/Bulkhead > DURING A SCHEDULED INSPECTION IN MSP, THE LEFT WS 27 AFT FLAP WELL RIB P/N 27-31080 WAS FOUND CHAFFED BY THE FLAP SWING LINK. BLENDED OUT CHAF DAMAGE AND INSTALLED A REPAIR DOUBLER AS PER EA 01-96132, AND LAR 92-MALA-107. (M) - [SDR MALA965116](https://openairdocs.org/sdr/MALA965116.md): Warning Light · illuminated · Sep 6, 1996 · N421MA · Swrngn SA227AC · Door Warning System > FLT 3451 - IN CRUISE FLIGHT TO AZO, THE CABIN DOOR LIGHT ILLUMINATED IN FLIGHT. THE AIRCRAFT DIVERTED TO AZO. MAINTENANCE INSPECTED THE CABIN DOOR SWITCHES AND BAYONETS. NO DISCREPANCIES NOTED. MAINTENANCE WAS UNABLE TO DUPLICATE THE DISCREPANCY. ALL CHEC - [SDR MALA965114](https://openairdocs.org/sdr/MALA965114.md): Angle · cracked · Aug 31, 1996 · N421MA · Swrngn SA227AC · Wing Miscellaneous Structure > DURING A SCHEDULED INSPECTION IN MSP, MAINTENANCE FOUND THE RIGHT INBOARD LOWER WING TO NACELLE ATTACH ANGLE CRACKED. COMPLETED REPAIR TO ATTACH ANGLE BY FABRICATING AND INSTALLING REPAIR ANGLE IAW FAIRCHILD ARP 54-20-9101 REV B. (M) - [SDR MALA965113](https://openairdocs.org/sdr/MALA965113.md): Door Frame · damaged · Aug 31, 1996 · N421MA · Swrngn SA227AC · Fuselage Miscellaneous Structure > DURING A SCHEDULED INSPECTION IN MSP, MAINTENANCE PERFORMED A REPAIR TO THE CARGO DOOR FRAME, P/N 27-22085, AT FS 491.00 BY REMOVING DAMAGED GAS STRUT MOUNT HOLE (1.625 BY 1.825). FABRICATED, PREPPED AND INSTALLED A REPAIR ANGLE, REPAIR PLATE, AND FILLER IAW - [SDR MALA965112](https://openairdocs.org/sdr/MALA965112.md): Frame · cracked · Aug 31, 1996 · N421MA · Swrngn SA227AC · Fuselage Main, Frame > DURING A SCHEDULED INSPECTION IN MSP, MAINTENANCE FOUND RELIEF RADIUS CRACKED AT LOWER RIGHT SIDE OF BELT FRAME AT FS 147. COMPLETED REPAIR TO BELT FRAME 147 RIGHT SIDE BY STOP DRILLING CRACK, FABRICATING AND INSTALLING REPAIR DOUBLER IAW FAC SRM 53-90-20 PAG - [SDR MALA965111](https://openairdocs.org/sdr/MALA965111.md): Angle · cracked · Aug 31, 1996 · N421MA · Swrngn SA227AC · Wing Miscellaneous Structure > DURING A SCHEDULED INSPECTION IN MSP, MAINTENANCE FOUND THE RIGHT OUTBOARD UPPER WING TO NACELLE ATTACH ANGLE CRACKED IN TWO LOCATIONS. FABRICATED NEW ANGLE USING LIKE MATERIAL AND THICKNESS. INSTALLED ANGLE IAW FAIRCHILD SRM 51-00-00 PAGE 4 'PART FOR PART R - [SDR MALA965110](https://openairdocs.org/sdr/MALA965110.md): Rib · cracked · Aug 31, 1996 · N421MA · Swrngn SA227AC · Wing, Rib/Bulkhead > DURING A SCHEDULED INSPECTION IN MSP, MAINTENANCE FOUND AT WS 27.03 RIGHT AFT WING RIB TRAILING EDGE (P/N 27-31523), A.25 INCH CRACK. COMPLETED REPAIR PER FAC SRM 57-90-10 PAGES 3-6, REV NOV 1/94 BY INSTALLING A 4 INCH BY 2.5 INCH REPAIR DOUBLER TO AFFECTED - [SDR MALA965019](https://openairdocs.org/sdr/MALA965019.md): Compensator · malfunctioned · Jun 8, 1996 · N421MA · Swrngn SA227AC · Trailing Edge Flap Control System > FLT 3140 - ON CLIMB-OUT FROM DTW, THE SAS FAULT LIGHT ILLUMINATED. THE AIRCRAFT RETURNED TO DTW. MAINTENANCE REPLACED THE SAS FLAP COMPENSATOR AND THE ANNUNCIATOR PANEL. (M) - [SDR MALA964946](https://openairdocs.org/sdr/MALA964946.md): Skin · dented · Apr 12, 1996 · N421MA · Swrngn SA227AC · Fuselage Main, Plate/Skin > DURING AN INSPECTION IN MSP, FOUND FUSELAGE SKIN DENTED AFT OF CARGO DOOR BETWEEN FS 512 AND FS 530.810, JUST BELOW WL 75. DENTED AREA DIMENSIONS 8 INCHES BY.375 INCHES. FABRICATED A REPAIR DOUBLER (13 INCHES BY 5.25 INCHES) AND INSTALLED IAW FAIRCHILD SRM - [SDR MALA964945](https://openairdocs.org/sdr/MALA964945.md): Door Frame · cracked · Apr 12, 1996 · N421MA · Swrngn SA227AC · Fuselage Miscellaneous Structure > MSP - DURING AN INSPECTION, FOUND AN APPROXIMATE.575 INCH CRACK IN THE CARGO DOOR FRAME PN 27-22085 AT FS 438.060. REPAIRED DAMAGE BY REMOVING DAMAGED GAS STRUT MOUNT HOLE (1.625 INCH BY 1.825 INCH), FABRICATING, TREATING, AND INSTALLING A REPAIR ANGLE, REPA - [SDR MALA964905](https://openairdocs.org/sdr/MALA964905.md): Switch · dirty · Mar 8, 1996 · N421MA · Swrngn SA227AC · Landing Gear Position and Warning > FLT NR 3369 - DURING APPROACH TO DTW, THE NOSE GEAR DOWN AND LOCKED LIGHT DID NOT ILLUMINATE UPON GEAR EXTENSION. THE CREW RECYCLED THE GEAR TWICE AND THE LIGHT ILLUMINATED. THE AIRCRAFT CONTINUED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE PERSONNEL CL - [SDR MALA954755](https://openairdocs.org/sdr/MALA954755.md): Dnlock Spring · worn · Dec 15, 1995 · N421MA · Swrngn SA227AC · Landing Gear Retraction/Extension System > FLT NR 3236 - DURING APPROACH TO MSP, THE RIGHT MAIN LANDING GEAR GREEN DOWN AND LOCKED LIGHT DID NOT ILLUMINATE FOR 30 SECONDS AFTER THE GEAR WAS SELECTED DOWN. MAINTENANCE PERSONNEL WERE UNABLE TO DUPLICATE THE DISCREPANCY, BUT REPLACED THE DOWNLOCK SPRINGS - [SDR MALA954664](https://openairdocs.org/sdr/MALA954664.md): Corner · cracked · Oct 14, 1995 · N421MA · Swrngn SA227AC · Passenger/Crew Doors > DURING A SCHEDULED INSPECTION IN MSP, MAINTENANCE NOTED A CRACK IN THE PASSENGER DOOR AT THE LEFT CORNER AT THE NUT PLATE FOR THE HAND RAIL BRACKET. REPAIRS WERE COMPLETED BY REPLACING THE CORNER, P/N 27-24044-010 IAW FAC SRM 51-00-00 PG 4 AND 51-40-01. (M) - [SDR MALA954453](https://openairdocs.org/sdr/MALA954453.md): Doubler · worn · May 14, 1995 · N421MA · Swrngn SA227AC · Wing Miscellaneous Structure > DURING SCHEDULED MAINTENANCE IN MSP, THE RIGHT FLAP WALKING BEAM ROLLER DOUBLER, LOCATED AT WS 27.0 WAS FOUND TO BE WORN. REPAIRS WERE COMPLETED BY REPLACING THE DOUBLER, P/N 27-31141, IAW FAC SRM 57-90-10 PAGES 45 AND 46, AND FAC ARP 57-20-9424. (W) - [SDR MALA954299](https://openairdocs.org/sdr/MALA954299.md): Wire · defective · Feb 7, 1995 · N421MA · Swrngn SA227AC · Landing Gear System Wiring > FLT 3065 - DURING THE LANDING ROLL IN DTW, AT APPROXIMATELY 40 KNOTS, THE AIRCRAFT VEERED TO THE RIGHT WITH THE NOSE WHEEL STEERING BUTTON PUSHED. THE AIRCRAFT CONTINUED TO THE GATE. MAINTENANCE REPAIRED A DEFECTIVE WIRING SECTION. SYSTEM OPERATED SATISFACT - [SDR MALA954277](https://openairdocs.org/sdr/MALA954277.md): Servo Valve · failed · Jan 26, 1995 · N421MA · Swrngn SA227AC · Landing Gear Steering System > FLT 3398 - DURING THE LANDING ROLL IN LEX, BELOW 90 KTS, THE AIRCRAFT VEERED TO THE RIGHT. MAINTENANCE REPLACED THE NOSE WHEEL STEERING SERVO. SYSTEM OPERATED SATISFACTORILY. (W) - [SDR MALA954231](https://openairdocs.org/sdr/MALA954231.md): Upper Frame · dented · Jan 7, 1995 · N421MA · Swrngn SA227AC · Cargo/Baggage Doors > DURING ROUTINE MAINTENANCE IN MSP, MAINTENANCE FOUND THE CARGO DOOR UPPER FRAME DENTED. REMOVED FRAME AND INSTALLED NEW FRAME. WORK COMPLETED IAW FAIRCHILD SRM 51-00-00 PG 4 FOR PART REPLACEMENT. (W) - [SDR MALA954229](https://openairdocs.org/sdr/MALA954229.md): Rpm Gauge · malfunctioned · Jan 5, 1995 · N421MA · Swrngn SA227AC · Engine RPM Indicating System > LNK - FLT 3222 - IN CRUISE, THE LT RPM GAUGE BEGAN TO FLUCTUATE. NO OTHER ENGINE FLUCTUATIONS NOTED. THE ACFT RETURNED TO MSP. MAINTENANCE WAS UNABLE TO DUPLICATE THE DISCREPANCY. THE SYSTEM OPERATED SATISFACTORILY DURING A TEST FLIGHT. (W) ## 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 = 'N421MA' AND registry_match = 'registration' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/aircraft/N421MA/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.