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| Date: | Tuesday 17 January 2012 |
| Time: | 16:30 |
| Type: |  Boeing 747-4B5ERF |
| Owner/operator: | Korean Air Cargo |
| Registration: | HL7601 |
| MSN: | 33946/1350 |
| Year of manufacture: | 2004 |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Over the Irish Sea -
 Atlantic Ocean
|
| Phase: | En route |
| Nature: | Cargo |
| Departure airport: | Chicago-O'Hare International Airport, IL (ORD/KORD) |
| Brussel-Zaventem Airport (BRU/EBBR) | |
| Investigating agency: | AAIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The aircraft was operating a commercial air transport (cargo) flight from Chicago O’Hare Airport to Brussels National Airport carrying 390 cows on the main deck. The aircraft was cruising at FL340 over the Irish Sea when the crew received a fire mn dk aft warning. A crew member went onto the main deck but saw no sign of smoke or fire. The crew suspected that the warning was false but decided to carry out the procedure in the Quick Reference Handbook for ‘Main Deck Cargo Compartment Suppression’, which involved donning oxygen masks and initiating a controlled cabin depressurisation and rapid descent. Following the descent, the crew made an uneventful landing at London Heathrow airport where emergency services attending the aircraft found no evidence of smoke or fire.
The pilot believed that the presence of the cattle led to higher than normal levels of humidity and that this was the cause of the warning.
Accident investigation:
 |
|
Sources:
https://assets.publishing.service.gov.uk/media/5422f46a40f0b61342000485/Boeing_747-4B5F_HL-7601_07-12.pdf
https://www.jetphotos.com/photo/7375613 (Photo)
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-Mar-2025 12:25 | Justanormalperson | Added |
| 08-Mar-2025 12:25 | ASN | Updated [Accident report, ] |
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