Minor Investigation Closed

SY252 - Sun Country Airlines Boeing 737-800 Pressurization Issue

Friday, June 13, 2025 at 12:35 PM (GMT-4)
737-800
Sun Country Airlines
Boston Logan International Airport

Sun Country Airlines Flight 252, operated by a Boeing 737-800, departed Boston Logan International Airport (BOS) bound for Minneapolis-St. Paul International Airport (MSP) on June 13, 2025. During the flight, the crew reported a pressurization issue and declared the situation to air traffic control. Following standard operating procedures for pressurization emergencies, the crew initiated a return to the departure airport. The aircraft executed a safe landing at Boston Logan Airport at approximately 12:35 PM Eastern Time. All passengers and crew members were safely evacuated with no injuries reported. The aircraft was grounded for inspection and repair of the pressurization system. The FAA was notified as per standard incident reporting requirements.

Aircraft & Operator Information

Aircraft
Model737-800
ManufacturerBoeing
Operator
NameSun Country Airlines
IATASY
Technical
RegistrationUnder investigation
Manufactured2010
Additional
CountryUnited States
Fleet Size60 aircraft

Incident Location

Departure
Destination
Incident Site
Route
Displayed routes are geodesic arcs that show the shortest route between destinations. The arc does not reflect a flight's actual flight path.
Departure
AirportBOS
NameBoston Logan International Airport
Destination
AirportMSP
NameMinneapolis–Saint Paul International Airport
Incident Site
Boston Logan International Airport
Emergency Landing
StatusNot Available

Weather Conditions (METAR)

Raw METAR KBOS 131654Z 13010KT 10SM FEW060 FEW160 FEW250 19/11 A3015 RMK AO2 SLP210 T01890111
AirportKBOS
Time4:54 PM (GMT+0)
Temperature19.0°C
Dewpoint11.0°C
Wind130° at 10 knots
Visibility 16093 m
Cloud Layer 1Few (FEW) 6,000ft AGL
Cloud Layer 2Few (FEW) 16,000ft AGL
Cloud Layer 3Few (FEW) 25,000ft AGL
Pressure30.15 inHg
KBOS
4:54 PM (GMT+0)
Atmospheric
Temperature19.0°C
Dewpoint11.0°C
Pressure30.15 inHg
Wind & Visibility
Wind130° at 10 knots
Visibility 16093 m
Clouds
Layers Few (FEW) 6,000ft AGL
  Few (FEW) 16,000ft AGL
  Few (FEW) 25,000ft AGL

References

Highlighted METAR entries relate to weather conditions within 30 minutes of the incident time.

Casualty Information

Casualty Information

Casualty information has not been reported.

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