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20250518007859I

Incident · Minor damage
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FAA incident report · Cirrus Design SR20 · Boca Raton, FL · May 18, 2025

FAA Aviation Safety Information Portal

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Date
May 18, 2025 · 10:50 local
Place
Boca Raton, FL
Phase of flight
Cruise/Level Flight
Operating rules
Pilot school (Part 141)
Damage
Minor damage
Aircraft
N654CB
Reported as
Cirrus Design SR20
Reported engine
Lycoming IO-390-C3B6
People aboard
2
Fatal injuries
0
Other injuries
0
Pilot’s certificates
Commercial pilot, flight instructor
Pilot’s flight hours
873 total
N654CBRegistered now · Cirrus Design SR20S/N 8644 · Built 2022Airframe modelCirrus Design SR20Engine modelLycoming IO-390-C3B6Reciprocating

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry 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.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

NTSB accident no.: n/a atqa : A-SO-19-25-041 sas activity no.: SO19202505010 task id:T-SO19-FY25-0793

Registration: xxxx make: Cirrus: SR20 serial number: xxxx when: 18MAY2025, at approximately 1140 hrs.

At approximately 1140 hours on may 18, 2025, nxxxx had emergency landing off airport at the L-40 canal (hillsboro canal) north of parkland, FL, at approximately lat/long 26.364667, -80.268401. The aircraft had 2 souls on board, with no injuries. The aircraft sustained minor damage. The aircraft was recovered and transported to Boca aircraft maintenance at Boca Raton airport (bct). A post incident inspection of the aircraft engine revealed no mechanical issue with the powerplant. Detailed post incident examination of the engine induction system and its constituent components revealed that half of the alternate air valve was unattached and was loose inside the engine induction housing assembly. The opposing half remained partially installed on its respective mount/actuator inside the induction tube. Based on the available information, it is likely that when the valve failed, it separated and was pulled into the induction housing, partially obstructing induction airflow and disrupting the engine’s fuel/air mixture.

P/n 21777-003. The rivets failed and the butterfly half became stuck at the entrance of the fuel control.

Probable cause: a partial loss of engine power due to the fatigue failure of the alternate air valve, which separated and partially obstructed the engine’s induction system.

This action closes this investigation into this incident.

As the FAA filed it

NTSB ACCIDENT NO.: N/A ATQA : A-SO-19-25-041 SAS ACTIVITY NO.: SO19202505010 TASK ID:T-SO19-FY25-0793

REGISTRATION: XXXX MAKE: CIRRUS: SR20 SERIAL NUMBER: XXXX WHEN: 18MAY2025, AT APPROXIMATELY 1140 HRS.

AT APPROXIMATELY 1140 HOURS ON MAY 18, 2025, NXXXX HAD EMERGENCY LANDING OFF AIRPORT AT THE L-40 CANAL (HILLSBORO CANAL) NORTH OF PARKLAND, FL, AT APPROXIMATELY LAT/LONG 26.364667, -80.268401. THE AIRCRAFT HAD 2 SOULS ON BOARD, WITH NO INJURIES. THE AIRCRAFT SUSTAINED MINOR DAMAGE. THE AIRCRAFT WAS RECOVERED AND TRANSPORTED TO BOCA AIRCRAFT MAINTENANCE AT BOCA RATON AIRPORT (BCT). A POST INCIDENT INSPECTION OF THE AIRCRAFT ENGINE REVEALED NO MECHANICAL ISSUE WITH THE POWERPLANT. DETAILED POST INCIDENT EXAMINATION OF THE ENGINE INDUCTION SYSTEM AND ITS CONSTITUENT COMPONENTS REVEALED THAT HALF OF THE ALTERNATE AIR VALVE WAS UNATTACHED AND WAS LOOSE INSIDE THE ENGINE INDUCTION HOUSING ASSEMBLY. THE OPPOSING HALF REMAINED PARTIALLY INSTALLED ON ITS RESPECTIVE MOUNT/ACTUATOR INSIDE THE INDUCTION TUBE. BASED ON THE AVAILABLE INFORMATION, IT IS LIKELY THAT WHEN THE VALVE FAILED, IT SEPARATED AND WAS PULLED INTO THE INDUCTION HOUSING, PARTIALLY OBSTRUCTING INDUCTION AIRFLOW AND DISRUPTING THE ENGINE’S FUEL/AIR MIXTURE.

P/N 21777-003. THE RIVETS FAILED AND THE BUTTERFLY HALF BECAME STUCK AT THE ENTRANCE OF THE FUEL CONTROL.

PROBABLE CAUSE: A PARTIAL LOSS OF ENGINE POWER DUE TO THE FATIGUE FAILURE OF THE ALTERNATE AIR VALVE, WHICH SEPARATED AND PARTIALLY OBSTRUCTED THE ENGINE’S INDUCTION SYSTEM.

THIS ACTION CLOSES THIS INVESTIGATION INTO THIS INCIDENT.