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The Boeing 737 MAX 9 aircraft has a persistent fish/urine smell in its cabin and cargo areas, which passengers are complaining about.

Airline HygieneAircraft MaintenancePublic SafetyApr 20, 2026score 0.353 posts · 0 replies across 3 instances
Multiple users report a strong fish/urine smell in the cabin and cargo of a Boeing 737 MAX 9 aircraft, with passengers complaining and the issue being worse on the ground. The situation requires deep cleaning of the carpet, indicating a hygiene and maintenance concern.

Claims

The Boeing 737 MAX 9 aircraft has a persistent fish/urine smell in its cabin and cargo areas, which passengers are complaining about.
Parent: Aircraft MaintenanceEntity: Boeing 737 MAX 9Impact: negativeDate: Apr 20, 2026 - Apr 21, 2026Target: The Boeing 737 MAX 9 aircraft's maintenance and hygiene standards

Source posts

@[email protected]
Air to Ground Message: VERY STRONG FISH/URINE SMELL IN CABIN AND CARGO PAX COMPLAINING. WORSE ON GROUND. NEEDS DEEP CLEANING CARPET TOO. IN THE BOOK AGAIN Area: Portland, OR, USA Type: Boeing 737 MAX 9 A: #a33bf395b57 F: #f62b2d234b0 #acars #vdlm2
0 boosts · 1 favs · 0 replies · Apr 20, 2026
#a33bf395b57#f62b2d234b0#acars#vdlm2
@[email protected]
Air to Ground Message: FAS ARE IN PHONE CONTACT WITH MEDLINK Area: Virginia, USA Type: Boeing 737 MAX 9 A: #a4949ff5903 F: #f2b75965c61 #acars #vdlm2
0 boosts · 0 favs · 1 replies · Apr 20, 2026
#a4949ff5903#f2b75965c61#acars#vdlm2
@[email protected]
Air to Ground Message: THANKS FOR THE GREAT SUPPORT Area: Philadelphia, PA, USA Type: Boeing 737 MAX 9 A: #a4949ff5903 F: #f2b75965c61 #acars #vdlm2
0 boosts · 0 favs · 0 replies · Apr 20, 2026
#a4949ff5903#f2b75965c61#acars#vdlm2
@[email protected]
Air to Ground Message: FYI HAVE MEDICAL. FEMALE PAX. NURSE ONBOARD ATTENDING. FA IS CALLING MEDLINK. PLEASE HAVE EMTS UPON ARRIVAL WAITING TO HEAR FROM MEDLINK STILL Area: Virginia, USA Type: Boeing 737 MAX 9 A: #a4949ff5903 F: #f2b75965c61 #acars #vdlm2
0 boosts · 0 favs · 1 replies · Apr 20, 2026
#a4949ff5903#f2b75965c61#acars#vdlm2
@[email protected]
Air to Ground Message: CAME DOWN TO FL330 FOR RIDE. ANY TURB AHEAD FOR US. OUR WIFI ISNT PLAYING NICE Area: Phoenix, AZ, USA Type: Boeing 737 MAX 9 A: #a6126aa6815 F: #f3c1a0a1b8c #acars #vdlm2
0 boosts · 0 favs · 0 replies · Apr 21, 2026
#a6126aa6815#f3c1a0a1b8c#acars#vdlm2
@[email protected]
Air to Ground Message: MEDLINK IS GOOD WITH LANDING AT EWR. WILL NOT BE DECLARING MED EMERGENCY AT THIS TIME BUT WILL DEFINITELY NEED EMTS. PLEASE LET OPS KNOW TOO Area: Gaithersburg, MD, USA Type: Boeing 737 MAX 9 A: #a4949ff5903 F: #f2b75965c61 #acars #vdlm2
0 boosts · 0 favs · 1 replies · Apr 20, 2026
#a4949ff5903#f2b75965c61#acars#vdlm2
@[email protected]
Air to Ground Message: VERY STRONG FISH/URINE SMELL IN CABIN AND CARGO PAX COMPLAINING. WORSE ON GROUND. NEEDS DEEP CLEANING CARPET TOO. IN THE BOOK AGAIN Area: Portland, OR, USA Type: Boeing 737 MAX 9 A: #a33bf395b57 F: #f62b2d234b0 #acars #vdlm2
0 boosts · 0 favs · 0 replies · Apr 20, 2026
#a33bf395b57#f62b2d234b0#acars#vdlm2
@[email protected]
Air to Ground Message: FYI HAVE MEDICAL. FEMALE PAX. NURSE ONBOARD ATTENDING. FA IS CALLING MEDLINK. PLEASE HAVE EMTS UPON ARRIVAL WAITING TO HEAR FROM MEDLINK STILL Area: Virginia, USA Type: Boeing 737 MAX 9 A: #a4949ff5903 F: #f2b75965c61 #acars #vdlm2
0 boosts · 0 favs · 1 replies · Apr 20, 2026
#a4949ff5903#f2b75965c61#acars#vdlm2
@[email protected]
Air to Ground Message: 3HI 2 CABIN SNAGS LAV V EXT DOOR ASHTRAY IS BROKEN. ALSO SEAT 16B IFE U/S. THANKS Area: Portland, OR, USA Type: Boeing 737 MAX 8 A: #aab40fc08ae F: #f501283b399 #acars #vdlm2
0 boosts · 0 favs · 0 replies · Apr 21, 2026
#aab40fc08ae#f501283b399#acars#vdlm2
@[email protected]
Air to Ground Message: OUR FLT PLAN IS 2 MLBEC. SFO LANDING 28S. CAN U CHECK IF SFO IS USING BDEGA4 ARRIVAL Area: Portland, OR, USA Type: Boeing 737 MAX 9 A: #ac78bec64bb F: #f325416879d #acars #vdlm2
0 boosts · 0 favs · 0 replies · Apr 21, 2026
#ac78bec64bb#f325416879d#acars#vdlm2
@[email protected]
Air to Ground Message: SMOOTH INDICATIONS AHEAD TRYING FL360 WE WILL LET U KNOW Area: Valparaiso, IN, USA Type: Boeing 737 MAX 9 A: #ac57aee8c47 F: #faa6696e46c #acars #vdlm2
0 boosts · 0 favs · 0 replies · Apr 19, 2026
#ac57aee8c47#faa6696e46c#acars#vdlm2
@[email protected]
Air to Ground Message: MEDLINK IS GOOD WITH LANDING AT EWR. WILL NOT BE DECLARING MED EMERGENCY AT THIS TIME BUT WILL DEFINITELY NEED EMTS. PLEASE LET OPS KNOW TOO Area: Gaithersburg, MD, USA Type: Boeing 737 MAX 9 A: #a4949ff5903 F: #f2b75965c61 #acars #vdlm2
0 boosts · 0 favs · 0 replies · Apr 20, 2026
#a4949ff5903#f2b75965c61#acars#vdlm2
@[email protected]
Air to Ground Message: IT LOOKS LIKE MEDLINK IS OK WITH GOING TO BOS BUT THEY WILL REQUEST EMT MEET THE AIRCRAFT WOULD YOU PLEASE MAKE SURE THAT HAS BEEN DONE ONCE WE GET A BIT CLOSER THANKS Area: Valparaiso, IN, USA Type: Boeing 737 MAX 9 A: #a5d66b5c666 F: #fc12c19bb7d #acars #vdlm2
0 boosts · 0 favs · 0 replies · Apr 21, 2026
#a5d66b5c666#fc12c19bb7d#acars#vdlm2
@[email protected]
Air to Ground Message: THANKS XXXXX TAKE CARE Area: Virginia, USA Type: Boeing 737 MAX 9 A: #a37aff9e0ae F: #f9308ad9f6f #acars #vdlm2
0 boosts · 0 favs · 0 replies · Apr 21, 2026
#a37aff9e0ae#f9308ad9f6f#acars#vdlm2
@[email protected]
Air to Ground Message: THANKS FOR YOUR HELP W/ THIS. CAN YOU ASK SEA TO HAVE A CSA SUPRVSR MEET US TO REASSURE THE PAX ABOUT HIS BAG AND ALSO SO HE CAN EXPLAIN THE SERVICE FAIL IN BOS Area: Blaine, MN, USA Type: Boeing 737 MAX 9 A: #ab9ad7f025f F: #f710b09377a #acars #vdlm2
0 boosts · 0 favs · 1 replies · Apr 21, 2026
#ab9ad7f025f#f710b09377a#acars#vdlm2