Key Lime Air Corporation

Operated by Key Lime Air (per NTSB report)

Operated by Key Lime Air (per NTSB report)

The Cirrus pilot’s failure to maintain the final approach course for the assigned runway, which resulted in a collision with the Swearingen which was on final approach to the parallel runway. Contributing to the accident was the failure of the controller to issue a traffic advisory to the Swearingen pilot regarding the location of Cirrus, and the Cirrus pilot’s decision to fly higher than recommended approach speed which resulted in a larger turn radius and contributed to his overshoot of the final approach course.

Operated by Key Lime Air (per NTSB report)

The pilot's decision to initiate and continue the flight into known adverse weather conditions, which resulted spatial disorientation, a loss of airplane control, and a subsequent in-flight breakup.

Operated by KEY LIME AIR CORPORATION (per NTSB report)

The uncontained engine failure due to the fatigue failure of the second-stage turbine rotor disk.

Operated by Key Lime Air (per NTSB report)

The pilot's improper fuel management and failure to conduct the engine failure emergency procedures and his improper conduct of the forced landing, which resulted in fuel starvation, a total loss of engine power, and the subsequent high-energy impact with power lines and terrain. Contributing to the accident was pilot fatigue.

Operated by KEY LIME AIR CORPORATION (per NTSB report)

The loss of power to the right engine for reasons that could not be determined during postaccident examination and teardown and the pilot’s failure to properly configure the airplane for single-engine flight.

Operated by KEY LIME AIR CORPORATION (per NTSB report)

The failure of the landing gear to extend due to the failure of a hydraulic line.

Operated by Key Lime Air, Inc. (per NTSB report)

The pilot's failure to extend the landing gear.

Operated by Key Lime Air (per NTSB report)

The probable cause of the incident was the Key Lime Air flight 4216 pilot's inadvertant entry onto the active runway. A contributing factor to the incident was the failure of the Denver tower ground and local controllers to detect the aircraft on the airport movement area safety system (ASDE) display and issue a go-around instruction to the arrival flight crew.

Operated by Key Lime Air, Inc. — On-demand air taxi (135) Operator Does Business As: same (per NTSB report)

wind shear.

Operated by Key Lime Air — None Operator Does Business As: (per NTSB report)

the pilot's failure to maintain directional control during the landing roll. Contributing factors include the pilot's improper in-flight planning/decision, the icy, snow covered runway and the snow bank.

Operated by KEY LIME AIR (per NTSB report)

The partial loss of engine power to both engines for undetermined reasons, and the pilot's improper in-flight decision to not land at the nearest available airport.

Operated by Key Lime Air (per NTSB report)

the failure of the dual student to verify that the landing gear was down and locked, and the failure of the flight instructor to adequately supervise the dual student.

Operated by KEY LIME AIR (per NTSB report)

the flight crews' intentional low altitude flight, and failure to maintain obstacle clearance.

Operated by KEY LIME AIR, INC. (per NTSB report)

the flight instructor's failure to maintain aircraft control while practicing stall maneuvers, which resulted in an inadvertent spin.

Sanction: $25,073 · case closed 2015-05-13

Sanction: $150,000 · case closed 2008-04-14

Sanction: $25,000 · case closed 2005-06-30

Sanction: $10,000 · case closed 2005-05-10

Sanction: $4,750 · case closed 2006-04-04

Part: TRANSFER TUBE — OCCLUDED (ENGINE OIL) · airframe 32,551 hrs · 54,061 cycles

DURING LANDING ROLLOUT, THE ENGINE LOST OIL PRESSURE, RESULTING IN A LOSS OF POWER AND ENGINE SHUTDOWN. TROUBLESHOOTING IDENTIFIED AN OCCLUDED MAIN SHAFT OIL TRANSFER TUBE. CLEANED THE MAIN SHAFT OIL TRANSFER TUBE IN ACCORDANCE WITH TPE331-11 MM 72-00-25, CHAPTER 72-10-14. GROUND OPS CHECK GOOD.

Part: RIB — CRACKED (ZONE 400) · airframe 47,323 hrs · 38,927 cycles

DURING A SCHEDULED C-CHECK, FOLLOWING REMOVAL OF BOTH ENGINES, A VISUAL INSPECTION IDENTIFIED FOUR APPROXIMATELY 1.5-INCH CRACKS, TWO ON EACH SIDE OF THE AIRCRAFT, IN THE RIB FIREPROOF PYLON SKIN, P/N 145-21430-402 SAME ON BOTH SIDES. PROPOSED REPAIR HAS BEEN SUBMITTED TO EMBRAER FOR ENGINEERING REVIEW AND APPROVAL.

Part: RELAY — FAULTED · airframe 41,972 hrs · 56,210 cycles

FLIGHT IDLE UNLOCKS NOT RELEASING UPON TOUCHDOWN AND NO LIGHT ILLUMINATION. R&R RELAY 204 & 205 IAW EMB120 76-10-00 RTS CK C/W

Part: DOOR — INFLT SEPARATION (ZONE 800) · airframe 34,072 hrs · 30,183 cycles

FLIGHT CREW REPORTED SERVICING DOOR MISSING DURING POST FLIGHT INSPECTION. UPON INVESTIGATION, IT WAS DISCOVERED THAT APU OIL WAS SERVICED PRIOR TO THE FLIGHT. MECHANIC CONFIRMED THAT THE DOOR WAS LATCHED AND SECURE PRIOR TO FLIGHT. INVESTIGATION REVEALED THAT OTHER EMB 145 OPERATORS HAVE MODIFIED THIS DOOR THROUGH THEIR ENGINEERING PROCESS TO ADD ADDITIONAL FASTENERS DUE TO LOSS OF THE DOORS DURING FLT WHEN SUCH LOSSES CANNOT BE ATTRIBUTED TO MAINT ERROR. THE DOOR AND LATCH DESIGN DO NOT APPEAR TO BE TOLERANT TO NORMAL MECHANICAL & HUMAN VARIANCE. IN PARTICULAR, THE UPPER MOST FORWARD LATCH APPEARS TO BE MORE CRITICAL THAN THE OTHER LATCHES AND IS OF A DESIGN WHICH IS NOT TOLERANT OF NORMAL WEAR.

Part: CONTROLLER — FAULTED (ZONE 100) · airframe 42,608 hrs · 45,566 cycles

SMOKE IN CABIN, A/C BLOWING EXTREMELY HOT AIR. EMERGENCY DECLARED AND AIRCRAFT RETURNED TO FIELD. R & R RH FLOW CONTROL VALVE IAW SA227 MM 21-10-20, R+R LH+RH MIXING VALVES IAW SA227 MM 21-40-00, R+R CABIN TEMP CONTROLLER IAW SA227 MM 21-60-00, OPS + LEAK CHECKS GOOD. RTS CHECK C/W

Part: BRAKE SYS — CONTAMINATED (ZONE 700) · airframe 34,874 hrs · 52,425 cycles

BRAKES INEFFECTIVE INSUFFICIENT TO MAINTAIN DIRECTIONAL CONTROL. BLED BRAKES IAW AMM 32-41-00 OPS CHECKED GOOD

Part: POWERPACK — LEAKING (HYD SYS) · airframe 36,436 hrs · 40,315 cycles

GEAR FAILURE/E1 HYDRAULIC LEAK EMERGENCY GEAR EXTENSION. R & R MAIN HYDRAULIC PACK IAW MM 29-10-10 FCF SATISFACTORY

Part: POWERPACK — LEAKING (HYD SYS) · airframe 36,486 hrs · 70,315 cycles

GEAR FAILURE/ E1 HYDRAULIC LEAK. R&R MAIN HYD PACK IAW SA 227 CC MM 29-10-10. KLA CONTROL # L3905

Part: BRAKE — WEAK (ZONE 700) · airframe 34,872 hrs · 52,422 cycles

BRAKES WEAK, INSUFFICIENT TO MAINTAIN DIRECTIONAL CONTROL. SERVICED BRAKE SYSTEM IAW SA227 MM CH 32-41-00. TAXI/ENGINE RUN CHECK SATISFACTORY

Part: BRAKE SYS — WEAK (ZONE 700) · airframe 34,872 hrs · 52,422 cycles

BRAKES WEAK, INSUFFICIENT TO MAINTAIN DIRECTIONAL CONTROL; SERVICED BRAKE SYSTEM IAW SA227 MM CH 32-41-00 TAXI/ENGINE RUN CHECK SAT. C/W RTS

Part: SERVO VALVE — FAULTED (ZONE 700) · airframe 36,422 hrs · 40,297 cycles

GEAR WOULD NOT COME DOWN - EMERGENCY GEAR DOWN PROCEDURE USED. R & R GEAR SERVO VALVE ON HYDRAULIC POWERPACK IAW MM 29-10-10. GEAR SWING OPS CHECKED GOOD. ORIGINAL SUBMISSION DATE: 06/29/2026

Part: PEDAL — BROKEN (ZONE 200) · airframe 21,298 hrs · 23,414 cycles

RIGHT BRAKE PEDAL CAPT. SIDE BROKE; R&R BOTH CAPTAIN SIDE RUDDER PEDAL BRAKE RODS IAW SA227 AMM 27-20-10 RTS CHECKS COMPLETE.

Part: PUSH-PULL ROD — BROKEN (RUDDER PEDALS) · airframe 21,298 hrs · 23,414 cycles

RIGHT BRAKE PEDAL CAPT. SIDE BROKEN. R&R BOTH CAPTAIN SIDE RUDDER PEDAL BRAKE RODS IAW AMM 27-20-10 RTS. CHECKS COMPLETE.

Part: WARNING LIGHT — ILLUMINATED (ZONE 800) · airframe 32,841 hrs · 29,831 cycles

CARGO DOOR PRIMARY & SECONDARY LIGHTS ILLUMINATED IN TAKEOFF ROLL; ON WORK ORDER # 40582, WAITING FOR FINAL REPAIR REPORT DUE ON 05/17/2026

Part: SENSOR — DIRTY (ZONE 800) · airframe 36,289 hrs · 40,152 cycles

CARGO DOOR PRIMARY & SECONDARY LIGHTS ILLUMINATED IN TAKEOFF ROLL; CLEANED AND LUBED WITH LPS2; OPS CHECKED GOOD IAW CH 52-30-20

Part: BRUSH BLOCK — FAULTED · airframe 34,820 hrs · 52,367 cycles

L PROP SHOWS ZERO AMPS. R & R BRUSH BLOCK IAW SA227 MM 50-60-10 OPS CHECK GOOD RTS CHECK COMPLETE

Part: PROXIMITY SWITCH — LACK OF LUBE (ZONE 700) · airframe 37,724 hrs · 46,718 cycles

GEAR DOOR POSITION INDICATOR INTERMITTENTLY FLASHING. CLEANED & LUBED GEAR DOOR POSITION SWITCHES, NO DEFECTS FOUND.

Part: SPRING — FAULTY (SEAT) · airframe 35,112 hrs · 33,105 cycles

CA SEAT SLIDES BACK ON TAKE OFF ROLL // R&R SPRING IAW ZODIAC SEATS CMM 25-11-71 + 20-003-A01 AND RE-INSTALLED CA SEAT IAW EMB AMM 25-11-01

Part: WING — NO DISCREPANCY (ZONE 600) · airframe 37,636 hrs · 34,470 cycles

BIRD STRIKE AFTER TAKEOFF, BIRD MADE CONTACT WITH R WING. CLEANED THE REMAINS & PREFORMED BIRD STRIKE INSPECTION IAW FMB145 AMM 05-50-08 NO DAMAGE C\W RTS CHECK

Part: DRAG LINK — FRACTURED (ZONE 700) · airframe 38,175 hrs · 50,987 cycles

AIRCRAFT DEPARTED KLBF FOR KDEN. PILOT REPORTED LT MLG FAILED TO INDICATE UP AFTER TAKEOFF. PILOT CYCLED GEAR SEVERAL TIMES, LT MAIN NEVER RETRACTED, SHOWED IN TRANSIT THROUGH REST OF FLIGHT. EMERGENCY GEAR EXTENSION WAS ATTEMPTED, NOSE AND RH GEAR LOCKED DOWN, LH INDICATED IN TRANSIT. AIRCRAFT LANDED RWY 35L AT KDEN. LH MAIN GEAR COLLASPED.

Part: WHEEL — VIBRATION (ZONE 700) · airframe 20,800 hrs · 22,910 cycles

SEVERE NOSE WHEEL SHIMMY ON TAXI. REPLACED BOTH NOSE GEAR TIRES AS REQUIRED. REF MM 32-40-50. INSP VISUAL, NO OBVIOUS DEFECTS NOTED.

Part: SKIN — CORRODED · airframe 24,030 hrs · 25,219 cycles

CORROSION WAS FOUND AT THE FWD TIP OF THE LH FUSELAGE SKIN. REPAIRED PER EO-53-034

Part: DOWNLOCK SWITCH — DIRTY (ZONE 700) · airframe 20,800 hrs · 22,910 cycles

ON APPROACH CYCLED GEAR 3 TIMES FOR NOSE GEAR GREEN. CLEANED & LUBRICATED DOWN LOCK SWITCHES, PERFORMED 15 GEAR SWINGS IAW MM 32-00-00 OPS CHECK GOOD C/W RTS CHECKS

Part: ENGINE — OVERTEMP (NR 2) · airframe 23,989 hrs · 25,177 cycles

N677DC E2 ITT EXCEEDANCE: ITT TEMP@ 925* WITH PWR LEVER AT MAX CLIMB, 85* HOTTER THEN E1 @ MAX CRUSE; STILL 80* HOTTER THEN E1. CAUSE IS STILL UNDER INVESTIGATION AT THIS TIME.

Part: HYDRAULIC LINE — LEAKING (FLAP ACTUATOR) · airframe 39,711 hrs · 46,659 cycles

FLAP ACTUATOR HYDRAULIC LINE LEAK. REMOVED & REPLACED THE FLAP ACTUATOR HYD LINE IAW SA227 MM 27-50-00 WPB AM C/W RTS CHECK.

Part: COOLING TURBINE — FUMES · airframe 39,659 hrs · 42,406 cycles

AIRCRAFT SMOKY WHEN IN FULL HOT. DRAINED 0IL OUT OF COOLING TURBINE REF SA227 MM CH 21-50-00

Part: WIRE — DEFECTIVE (FIRE DETECTOR) · airframe 35,774 hrs · 39,618 cycles

E1 ENG FIRE LIGHT ON. REPAIRED DEFECTIVE WIRING TO ENG FIRE DETECTOR DT 1003 IAW SA227DC WM 26-20-00 OPS CHECK GOOD ON GRD

Part: UNKNOWN — SMOKE (COCKPIT) · airframe 31,119 hrs · 38,227 cycles

SMOKE IN COCKPIT / NWS / PITCH TRIM. CLEANED BOTH WATERSOCKS FOR SMOKE IN THE COCKPIT, ALL PANELS HAVE BEEN CLOSED, IAW SA227 MM 21-70-10.

Part: COALESCER BAG — ODOR (ZONE 100) · airframe 31,119 hrs · 38,227 cycles

SMOKE IN COCKPIT FROM BLEEDS. TEMP CONTROLLER WAS IN AUTO AND MOSTLY TOWARDS HOT. CLEANED L & R WATERSOCKS GRD RUN'S OPS CHECK GOOD NO SMOKE IN CABIN IAW MM 21-40-00 RTS.

Part: BUSHING — WORN (MLG DOOR HINGE) · airframe 20,592 hrs · 22,697 cycles

RIGHT MAIN GEAR INNER DOOR OPENS ON EVERY LANDING. # 3 MLG DOOR HINGE BUSHINGS FOUND TO BE WORN. R&R ALL ASSOCIATED BUSHING AND ADJUSTED #3 MLG DOOR IAW SA227 66 MM 52-80-10 RTS GOOD.

Part: RELAY — FAULTED (AUTOFEATHER SYS) · airframe 41,709 hrs · 55,711 cycles

AUTO FEATHER AURAL WARNING ALERT ON TAKEOFF WITH AUTO FEATHER ON. REMOVED & REPLACED RELAY K0161 IAW EMB120 WM 20-20-00 OPS CHECK GOOD IAW EMB120 MM 61-23-20 WPB RTC CHECK GOOD.

Part: CONTROL UNIT — FAULTED (FIRE DETECTION) · airframe 16,525 hrs · 16,145 cycles

E2 FIRE LIGHT ON WITH NO FIRE. R&R E2 FIRE DETECTION CONTROL UNIT IAW DO328-300 MM 36-11-00 & 26-11-02

Part: BRAKE — FAILED (NR 1) · airframe 36,630 hrs · 54,545 cycles

LH BRAKE UNRESPONSIVE. R&R #1 BRAKE IAW SA227 MM 32-40-00 BRAKE CHECK GOOD

Part: CABIN PRESSURE — MALFUNCTIONED · airframe 37,034 hrs · 33,666 cycles

UNCONTROLLABLE CABIN PRESSURIZATION IN FLIGHT - BOTH IN AUTO & MANUAL MODES.

Part: BRAKE — WEAK (ZONE 700) · airframe 36,593 hrs · 54,517 cycles

LEFT BRAKE SPONGEY, WILL GO ALL THE WAY TO THE FLOOR. BLED & SERVICED BRAKE SYSTEM IAW SA277 MM CH 32-41-00. RTS CHECKS COMPLETED

Part: STICK PUSHER — MALFUNCTIONED · airframe 37,907 hrs · 50,677 cycles

STICK PUSHER MOMENTARILY ENGAGED ON FINAL AT ABOUT 1,200 FT. AGL. FLAPS WERE FULL AND LANDING GEAR DOWN ON 09/15/2025 08:06PM

Part: DOOR — LOOSE (ZONE 800) · airframe 34,268 hrs · 33,486 cycles

RH MAIN GEAR NO TRANSIT INDICATION OR DOWN LOCKED FOR 2 CYCLES; TIGHTENED LOOSE HARDWARE ON RH MLG INBD DOOR PER SA227 MM CH 52-80-10 C/W RTS CHECK

Part: LANDING GEAR — MALFUNCTIONED (ZONE 700) · airframe 23,122 hrs · 79,030 cycles

LEFT MAIN GEAR SHOWS STOWED ON INDICATOR, BUT CONTINUES UP ACTUATION. CYCLED GEAR IN ACCORDANCE WITH MX CONTROL B. NILHAS 01339 NO DEFECTS NOTED.

Part: CONTROL UNIT — NOT REPORTED (RT GENERATOR) · airframe 37,886 hrs · 50,647 cycles

REPLACED RH GENERATOR CONTROL UNIT C0303 P# 51509-002B SN 15239A

Part: WIRE — DAMAGED (FIRE DETECTOR) · airframe 35,371 hrs · 39,188 cycles

LEFT ENGINE FIRE LIGHT ERRONEOUSLY ON DURING SHORT FINAL FOR 3 SECONDS & AGAIN DURING TAXI FOR 3 SECONDS. REPAIRED WIRING TO LH ENGINE FIRE DETECTOR OPS CHECK GOOD PER SA227 AMM CH 26-10-10 RTS CHECK COMPLETED. F7536

Part: CONTROL UNIT — FAILED (TE FLAPS) · airframe 34,077 hrs · 30,722 cycles

FLAP LOW SPEED MESSAGE IN FLIGHT. FLAP FAILED WHEN PUTTING FLAPS DOWN. REPLACED FLAP ELECTRONIC CONTROL UNIT. IAW 27-53-02 OGC.

Part: SKIN — CORRODED (ZONE 100) · airframe 41,293 hrs · 44,202 cycles

A/B/E CHECK FOUND BELLY CORROSION

Part: GAUGE — INTERMITTENT (HYD SYSTEM) · airframe 33,824 hrs · 50,559 cycles

L & R HYDRO PRESS ANNUNCIATORS AS WELL AS ZERO ON HYDRO PRESSURE GAUGE INTERMITTENT.

Part: CHECK VALVE — FAULTED (NR 1 ENGINE) · airframe 18,481 hrs · 19,365 cycles

E1 POPPING/BANGING DURING POWER REDUCTION FOR LANDING. ENGINE OIL PRESSURE FLUCTUATING NO RWP LIGHT OR TEMP CHANGE. REPLACED CHECK VALVE ON E1 BLEED AIR LINE FOR HIGH PRESSURE LINE. IAW PW306B MM 75-00-00 GROUND RUNS / OPS CHECK GOOD.

Part: LANDING GEAR — FAULTED · airframe 31,775 hrs · 42,478 cycles

STANDARD TRAINING FLIGHT AND FINAL LANDING FOR THE DAY. VFR RULES THE WHOLE DAY. FLIGHT INSTRUCTOR TOOK T HE CONTROLS AND HEADED BACK TO KORK AIRPORT TO LAND. WE CONTINUED AS NORMAL MAKING A RIGHT DOWNWIND FOR RUNWAY 23, BEING FULLY CONFIGURED FOR LANDING ON FINAL BACKING THIS UP WITH OUR CHECKLISTS. WE LANDED ON THE NUMBERS WITH FULL FLAPS, AND GEAR DOWN AND LOCKED VERIFIED BY THREE GREEN LIGHTS. WE TOUCHED DOWN WITH OUR RIGHT MAIN MAKING CONTACT FIRST, VERIFIED BY TIRE MARKS ON THE RUNWAY. FOLLOWED BY OUR LEFT MAIN MAKING CONTACT ALMOST SIMULTANEOUSLY AS OUR NOSE WHEEL. IT FELT AND LOOKED AS IF OUR LEFT MAIN GEAR FAILED UPON MAKING CONTACT WITH THE RUNWAY. WE IMMEDIATELY STARTED TO VEER OF THE RUNWAY TO THE LEFT, AND AFTER TALKING TO PILOT NO CONTROL INPUTS HAD ANY EFFECT ON OUR TRAJECTORY. ROUGHLY 800 FEET AFTER TOUCHDOWN, JUST PRIOR TO THE 1000 FOOT MARKINGS, OUR LEFT WING/ENGINE/TIRE SEEMS TO HAVE MADE CONTACT WITH THE DIRT AND PULLED US FURTHER MORE TO THE LEFT, AT THIS TIME PILOT STOP AND FEATHERED THE ENGINES. WE CONTINUED TO VEER LEFT WHERE WE EVENTUALLY LANDED IN AN EMBANKMENT ROUGHLY 1400 FEET FROM THE RUNWAY MARKING NUMBER 23 IN A STRAIGHT LINE DISTANCE

Part: BRAKE ASSY — SMOKE (ZONE 700) · airframe 9,818 hrs · 7,849 cycles

LH BRAKE SMOKING. R & R #18Z WHEEL ASSY IAW FRS145 ASSY 32-59-648 #1 BRAKE IAW 32-49-03-04 006

Part: HYDRAULIC LINE — LEAKING (ZONE 100) · airframe 41,484 hrs · 55,654 cycles

LOST HYDRAULIC FLUID FROM GREEN SYSTEM. REPAIRED E1 HYDRAULIC LINE RESERVOIR TO HYD PUMP RETURN LINE. IAW EMB STANDARD PRACTICE CH 20-10-04 GROUND RUN OPS / LEAK CHECK GOOD. E1 CLEANED / INSPECTED ENGINE ASSY, TIGHTEN OIL LINE RH SIDE OF ENGINE. GROUND RUN NO LEAKS FOUND. SERVICED GREEN HYDRAULIC SYSTEM WITH HYD FLUID IAW EMB120 MM 12-13-13.

Part: HOSE — FAILED (HYD SYSTEM) · airframe 37,722 hrs · 5,040 cycles

L & R HYDRO FAILURE IN FLIGHT. R & R E2 HYDRAULIC PUMP PRESSURE RIGID LINE W/FLEXIBLE HOSE IAW SA227 MM CH 29.00.00 & SA227 SB 227-71-005, NO LEAKS NOTED. FERRY FLIGHT TERMINATED @ KDEN.

Part: WINDSHIELD — CRACKED (ZONE 200) · airframe 33,997 hrs · 30,653 cycles

RIGHT CRACKED WINDSHIELD. REMOVED AND REPLACED RIGHT WINDSHIELD W/ SERVICEABLE WINDOW. OPS CHECKED GOOD IAW EMB145 MM CH 56-10-01.

Part: DAMPER — FAULTED (ZONE 300) · airframe 60,823 hrs · 43,744 cycles

REMOVED AND SERVICED ELEVATOR DAMPER AND REINSTALLED PER SA227 MM CH 27-30-10 PERFORMED CABLE TENSION INSPECTION PER SA22X TC 27.920