# N421MQ: Aerospatiale/Aeritalia ATR 42-300, registration cancelled 1998-06-11 - Type: Cancelled registration (FAA registry, deregistered aircraft) - Cancelled: June 11, 1998 - Exported to: France - Status when cancelled: Valid registration - Airframe: [Aerospatiale/Aeritalia ATR 42-300](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-300) (registry code 8680920) - Data sheets: [TCDS A53EU](https://openairdocs.org/tcds/A53EU) (OpenAirDocs) - Serial number: 014 - Type of aircraft: Fixed wing multi engine - Certificate issued: May 11, 1998 - Last registry action: May 11, 1998 - Mode S code: A50078 - Owner when cancelled: [American Eagle Airlines Inc](https://openairdocs.org/faa-owner/AMERICAN%20EAGLE%20AIRLINES%20INC) - Location: [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth) - Owner type: Corporation - Owner's area on the map: 32.8240° N, 97.0491° W: Placed by OpenAirDocs at the center of ZIP code 76155, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based - The mark today: https://openairdocs.org/aircraft/N421MQ - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=421MQ - Page: https://openairdocs.org/deregistered/N421MQ-1998-06-11 From the FAA registry file of October 29, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe. ADs and bulletins for the Aerospatiale/Aeritalia ATR 42-300: https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-300.md ## Service difficulty reports (17) Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. - [SDR SIMA973421](https://openairdocs.org/sdr/SIMA973421), Dec 8, 1997: RESISTOR. FAILED. ORD - FLT 4366 - SIX FLOOR EMERGENCY LIGHTS OUT. RAI BURNED RESISTOR ON EMERGENCY POWER SUPPLY ON 29WL, OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE. (M) - [SDR SIMA9701903](https://openairdocs.org/sdr/SIMA9701903), Jul 9, 1997: FUSES. BLOWN. ORD - FLT 4082 - THREE EMERGENCY EXIT FLOOR PROXIMITY LIGHTS IN REAR OF CABIN ARE INOPERABLE. MEL 33-22 CAT C AUTH NR 070122. MEL'D SYSTEM PER 33-22, AND RETURN - [SDR SIMA971591](https://openairdocs.org/sdr/SIMA971591), Jun 8, 1997: BATTERY. DISCHARGED. ORD - FLT 4088 - FORWARD LOWER EMERGENCY EXIT LIGHT INOP. REPLACED BATTERY FOR EMERGENCY LIGHT AT SEAT 1AB (3WL) PERFORMED OPS CHECK. AIRCRAFT WAS RETURN TO SER - [SDR SIMA9701521](https://openairdocs.org/sdr/SIMA9701521), Jun 1, 1997: BULB. FAILED. ORD - FLT 4389 - TWO LIGHT BULBS THE THIRD FROM THE LAST AND THE LAST EMERGENCY FLOOR LIGHT STRIP INOP. ENTERED INTO MEL. AIRCRAFT RETURNED TO SERVICE. MEL WAS - [SDR SIMA971251](https://openairdocs.org/sdr/SIMA971251), May 5, 1997: BEARING. SEIZED. ORD - FLT 4304 - AFTER LANDING, THE CREW NOTED THAT THE HOT BRAKE WARNING LIGHT ILLUMINATED, THE AIRCRAFT WAS STOPPED TO INVESTIGATE AND FOUND THAT THE NR 1 MAI - [SDR SIMA9700161](https://openairdocs.org/sdr/SIMA9700161), Jan 16, 1997: LANDING LIGHT. FAILED. ORD - FLT 4162 - ON SHORT FINAL FOR LANDING IN ORD, THE RIGHT LANDING LIGHT CB TRIPPED FOLLOWED BY NOISE OF RELAY, CHATTERING AND A HOT ELECTRICAL ODOR IN THE C - [SDR SIMA960942](https://openairdocs.org/sdr/SIMA960942), Apr 3, 1996: LANDING GEAR. FAILED. TVC - FLT 4245 - AFTER LANDING AT TVC, DURING ROLL OUT TO TAXI WAY, AIRCRAFT LT MLG FAILED. CREW COMPLIED WITH ENGINE SHUTDOWN AND EMERGENCY EVACUATION OF PASSE - [SDR SIMA960631](https://openairdocs.org/sdr/SIMA960631), Mar 3, 1996: WIRE. BROKEN. ORD - FLT 4164 - WIRE FOR ENTRANCE EMERGENCY LIGHT BROKEN BY PASSENGER. MAINTENANCE REPAIRED BROKEN WIRE. AIRCRAFT RETURNED TO SERVICE. (X) - [SDR SIMA960332](https://openairdocs.org/sdr/SIMA960332), Feb 2, 1996: BATTERY PACK. DISCHARGED. CMI - EMERGENCY LIGHTS FOR BATTERY PACK POSITION 10WL INOPERATIVE AND EMERGENCY LIGHTS AT POSITION 3WL WILL NOT GO OUT. RAI'D BATTERY PACKS AT 10WL AND 3WL. AIR - [SDR 96ZZZM257](https://openairdocs.org/sdr/96ZZZM257), Feb 2, 1996: BATTERY PACK. DISCHARGED. CMI - EMERGENCY LIGHTS FOR BATTERY PACK POSITION 10WL INOPERATIVE AND EMERGENCY LIGHTS AT POSITION 3WL WILL NOT GO OUT. RAI'D BATTERY PACKS AT 10WL AND 3WL. AIR - [SDR SIMA953271](https://openairdocs.org/sdr/SIMA953271), Nov 23, 1995: BELL CRANK ASSY. WORN BEARING. ORD - DURING ACCOMPLISHMENT OF EO E9-2700-001 INSP OF AILERON CONTROL SYS, FOUND PENDULAR LEVER ASSY AT LT WING RIB STA NRS 16, 14, 13, AND 8, RT WING RIB STA N - [SDR 95ZZZX6625](https://openairdocs.org/sdr/95ZZZX6625), Nov 23, 1995: CRANK ASSY. WORN BEARING. ORD - DURING ACCOMPLISHMENT OF EO E9-2700-001 INSP OF AILERON CONTROL SYS, FOUND PENDULAR LEVER ASSY AT LT WING RIB STA NRS 16, 14, 13, AND 8, RT WING RIB STA N - [SDR 95ZZZX6624](https://openairdocs.org/sdr/95ZZZX6624), Nov 23, 1995: CRANK ASSY. WORN BEARING. ORD - DURING ACCOMPLISHMENT OF EO E9-2700-001 INSP OF AILERON CONTROL SYS, FOUND PENDULAR LEVER ASSY AT LT WING RIB STA NRS 16, 14, 13, AND 8, RT WING RIB STA N - [SDR 95ZZZX6623](https://openairdocs.org/sdr/95ZZZX6623), Nov 23, 1995: ROD ASSY. BENT. ORD - DURING ACCOMPLISHMENT OF EO E9-2700-001 INSP OF AILERON CONTROL SYS, FOUND PENDULAR LEVER ASSY AT LT WING RIB STA NRS 16, 14, 13, AND 8, RT WING RIB STA N - [SDR SIMA952922](https://openairdocs.org/sdr/SIMA952922), Oct 19, 1995: EEL POWER SUPPLY. DEFECTIVE. CVG - FLT 4020 - EMERGENCY BATTERY SUPPLY WILL NOT POWER EMERGENCY EXIT LIGHTS OVER EXITS AND FLOOR LIGHTING. RAI BATTERY PACKS AT 3WL AND 18WL, S/N 2456 AND 29 - [SDR SIMA950942](https://openairdocs.org/sdr/SIMA950942), Apr 4, 1995: WINDOW FRAME. CRACKED. SAT - DURING A 24,000 CYCLE INSPECTION, EDDY CURRENT INSPECTION REVEALED A .25 INCH CRACK IN THE VERTICAL PLANE OF NODE 5 RIGHT WINDOW FRAME. MAINTENANCE BLENDE - [SDR SIMA950941](https://openairdocs.org/sdr/SIMA950941), Apr 4, 1995: WINDOW FRAME. CRACKED. SAT - DURING A 24,000 CYCLE INSPECTION, EDDY CURRENT INSPECTION REVEALED A .25 INCH CRACK ON THE VERTICAL PLANE OF THE NODE 5 LEFT WINDOW FRAME. MAINTENANCE BLE ## NTSB investigations (2) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB CHI96IA125](https://openairdocs.org/ntsb/CHI96IA125), Apr 3, 1996: ATR 42 (N421MQ), Traverse City, MI, incident, minor damage. Probable cause: improper use of procedures by maintenance personnel at an overhaul facility during overhaul of the landing gear, allowing corrosion to occur on the barrel lugs of the landing gear, which subsequently… - [NTSB CHI88IA045](https://openairdocs.org/ntsb/CHI88IA045), Jan 19, 1988: Aerospatiale ATR-42 (N421MQ), Waterloo, IA, incident, minor damage ## FAA accident and incident reports (5) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Incident 19970505012409I](https://openairdocs.org/incident/19970505012409I), May 5, 1997: Aerosp ATR42300 (N421MQ), Chicago, IL, Minor damage. Narrative: an aerospatiale ATR-42, aircraft serial number 014, registration number N421MQ, operating as American eagle flight 4304, landed at o'Hare airport,… - [Incident 19960521018209I](https://openairdocs.org/incident/19960521018209I), May 21, 1996: Aerosp ATR42300 (N421MQ), Marquette, MI. Narrative: aircraft N421MQ departed mqt on flight 4140 and enroute to cwa the lt. main landing gear unlock indicator showed unsafe indication. The aircraft… - [Incident 19960403009959I](https://openairdocs.org/incident/19960403009959I), Apr 3, 1996: Aerosp ATR42300 (N421MQ), Traverse City, MI, Minor damage. Narrative: during roll out to taxiway, aircraft lt. MLG failed. Aircraft stopped approximately 600 ft from departure end after sliding 250 ft. investigation… - [Incident 19900807043099I](https://openairdocs.org/incident/19900807043099I), Aug 7, 1990: Aerosp ATR42300 (N421MQ), Cedar Rapids, IA, Minor damage. Cabin window cracked en route. Pressurization held. Descended and continued to destination. - [Incident 19880117001109I](https://openairdocs.org/incident/19880117001109I), Jan 17, 1988: Aerosp ATR42300 (N421MQ), Waterloo, IA, Minor damage. Engine fire warning light came on. Returned. Found burnt wires, caused by leaking secondary fuel nozzles. ## Other aircraft with N421MQ - [Registered now](https://openairdocs.org/aircraft/N421MQ): Diamond Aircraft Ind DA 42 NG, S/N 42.N439, built 2021 --- 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.