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| Date: | Tuesday 27 February 2024 |
| Time: | c. 11:41 LT |
| Type: |  Boeing 737-8AL (WL) |
| Owner/operator: | MIAT - Mongolian Airlines |
| Registration: | JU-1088 |
| MSN: | 37961/3847 |
| Year of manufacture: | 2011 |
| Engine model: | CFMI CFM56-7B |
| Fatalities: | Fatalities: 0 / Occupants: 141 |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Category: | Incident |
| Location: | near Xinyang -
 China
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Hong Kong-Chek Lap Kok International Airport (HKG/VHHH) |
| Ulaanbaatar-Chinggis Khaan International Airport (UBN/ZMCK) | |
| Investigating agency: | AAIB Mongolia |
| Confidence Rating: |  Accident investigation report completed and information captured |
A B737-800, JU-1088, at11 hours local time 41 minutes 50 seconds /UTC 04:41:50/. UTC to 05:14:25, or 33 minutes after the aircraft took off the height of the flight has been maintained at 34835ft. While cruising the “Cabin Altitude Warning Horn” sounded.
The cabin crew noticed the 2R seal around the door was making a noise, the flight crew then asked the passengers about the noise and she said, "Well, you know, you know, you're going to be there." Some passengers said they could also hear the sound. The Passengers in the 20th row of seats said they heard the sound the loudest.
The Cockpit Voice Recorder (CVR) recorded “Cabin Altitude Warning Horn” for 1 minute 40 seconds after reaching 35494ft, and ended after 18 minutes after the aircraft had descended to 8000 ft, so the passengers were safe. The crew decided to divert to Beijing.
Accident investigation:
 |
|
Sources:
https://www.aaib.gov.mn/uploads/71faebfb6c10d9af4132d8c2cc13f946.pdf
https://www.jetphotos.com/photo/11277507 (Photo)
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Sep-2025 20:57 | Justanormalperson | Added |
| 24-Sep-2025 20:59 | Justanormalperson | Updated |
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